Hard disk, hard disk management method and storage system

Abstract

The invention discloses a hard disk, a hard disk management method and a storage system, and relates to the technical field of storage. The disks in the hard disk are slidably connected with the sleeve, and the disks can be sleeved on the sleeve in a stacked manner, so that more disks can be arranged in a single hard disk, and the storage capacity of the hard disk is improved. Moreover, in the data access process, the magnetic head extends into different discs according to the address to be accessed, so that the problem that the magnetic head cannot access data due to the fact that no gap exists between the stacked discs is solved.

Description

Technical Field

[0001] The present application relates to the field of storage technology, and in particular to a hard disk, a hard disk management method and a storage system. Background Art

[0002] With the development of storage media technology, the storage capacity of hard disks is getting larger and larger. A single hard disk can store one or more platters (platters) for storing data, which are also called disks. The hard disk also includes components such as a spindle motor, multiple heads, and a driver circuit board. In the hard disk, multiple disks are arranged at intervals along the spindle motor of the hard disk, and each disk is equipped with a head. During data access, the hard disk controls the head among multiple heads that matches the address information carried by the data access request to access the disk corresponding to the head. Since space for the heads needs to be reserved between adjacent disks, and the position of the disk in the spindle motor of the hard disk is fixed, the number of disks that can be stored in a single hard disk is limited, and thus the storage capacity in the hard disk cannot meet the growing data storage needs. Summary of the invention

[0003] The present application provides a hard disk, a hard disk management method and a storage system, which solves the problem of a small number of disks that can be stored in a single hard disk due to the fixed position of the spindle motor of the disk in the hard disk, and increases the storage capacity that a single hard disk can provide.

[0004] In a first aspect, the present application provides a hard disk. The hard disk includes: a sleeve, a plurality of discs and a magnetic head. The plurality of discs are sleeved on the sleeve, including: a first disc and a second disc adjacent to each other; the first disc is slidably connected to the sleeve, and the second disc is slidably connected to the sleeve. The magnetic head is used to extend between the first disc and the second disc to access the first disc or the second disc.

[0005] In the present application, the disks in the hard disk are slidably connected to the sleeve, and each disk can be stacked on the sleeve, so that more disks can be set in a single hard disk, thereby increasing the storage capacity of the hard disk. Moreover, during data access, the magnetic head extends between different disks according to the address to be accessed, solving the problem that the magnetic head cannot access data due to the lack of gaps between the stacked disks.

[0006] In an optional implementation, the hard disk provided in the present application further includes: a separation component, which is arranged on the inner side of the sleeve and is used to separate the first disc and the second disc, or stack the first disc and the second disc.

[0007] Exemplarily, if the separation component places the first disk and the second disk in a separation state, the magnetic head may extend into the gap between the first disk and the second disk to access data stored in the first disk or the second disk.

[0008] As another example, if the separation assembly places the first disk and the second disk in a stacked state, more disks can be arranged in the hard disk, which is beneficial to increase the storage capacity of the hard disk.

[0009] In an optional implementation, the sleeve is provided with a first hole structure, and the first hole structure penetrates the inner wall and the outer wall of the sleeve. If the first disc and the second disc are in a separated state, the projections of the first disc and the second disc in the axial direction of the sleeve are located on both sides of the first hole structure. In the present application, a hole structure is provided on the sleeve, and during the data access process, the hole structure can be used to conduct air or other gases to open the adjacent discs (change from a stacked state to a separated state), so that the magnetic head can extend into the gap between the first disc and the second disc to access the data stored in the first disc or the second disc.

[0010] In an optional implementation, the separation component includes: an inflatable structure, provided with a gas delivery port, and the gas delivery port and the first hole structure are detachably connected. If the gas delivery port and the first hole structure are in a connected state, the gas delivery port and the first hole structure are connected. And, if the gas delivery port and the hole structure of the inflatable structure are in an unconnected state, the gas delivery port and the hole structure are not connected, and the hole structure cannot conduct air or other gases, so that adjacent discs are in a stacked state.

[0011] In an optional implementation, the inflatable structure is rotatably connected to the sleeve. For example, the inflatable structure can rotate in the sleeve to connect or disconnect the gas delivery port and the hole structure in the sleeve, thereby controlling the positions of the multiple discs to be opened.

[0012] In an optional implementation, the first hole structure includes a plurality of through holes, and the plurality of through holes are arranged at intervals along the circumference of the sleeve. Since each disk is sleeved on the sleeve, a plurality of through holes are arranged in the circumference of the sleeve, and when the plurality of through holes conduct air or other gas, the disks corresponding to the positions of the plurality of through holes are opened, so that the magnetic head can extend into the gap between the first disk and the second disk to access the data stored in the first disk or the second disk.

[0013] In an optional implementation, the sleeve is further provided with a second hole structure, and the second hole structure penetrates the inner wall and the outer wall of the sleeve. The plurality of discs further include: a third disc, which is located on the side of the second disc away from the first disc and is slidably connected to the sleeve. If the second disc and the third disc are in a separated state, the projections of the third disc and the second disc in the axial direction of the sleeve are located on both sides of the second hole structure. In the present application, a hole structure is provided on the sleeve, and during the data access process, the hole structure can be used to conduct air or other gases to open the adjacent discs (change from a stacked state to a separated state), so that the magnetic head can extend into the gap between the second disc and the third disc to access the data stored in the second disc or the third disc.

[0014] In an optional implementation, the projections of the first hole structure and the second hole structure in the circumferential direction of the sleeve do not overlap. Different hole structures are arranged in the circumferential direction of the sleeve, so that the gas delivery port of the inflatable structure can be connected with different hole structures during the rotation process to open the discs at different positions on the sleeve.

[0015] In an optional implementation, the sleeve is provided with a first assembly portion. The separation assembly includes: a support member, which is detachably connected to the first assembly portion and is used to support the first disk or the second disk so that there is a gap between the first disk and the second disk. In the present application, the multiple disks stacked on the sleeve are opened by the assembly portion and the support member, so that the magnetic head can extend between adjacent disks to access the data stored in the opened disk.

[0016] In an optional implementation, the sleeve is further provided with a second assembly portion. The hard disk further includes: a fourth disc, which is located on a side of the first disc away from the second disc and is slidably connected to the sleeve. The support member is detachably connected to the second assembly portion, and is also used to support the first disc or the fourth disc, so that there is a gap between the first disc and the fourth disc. Different assembly portions correspond to gaps to be opened between different discs, so that when the support member is connected to different assembly portions, the support member can open different discs, so that the magnetic head can extend between adjacent discs to access data stored in the opened discs.

[0017] In an optional implementation, the first assembly portion includes a plurality of slots, which are spaced apart along the circumference of the sleeve. The support member includes a plurality of latches, which are spaced apart along the circumference of the sleeve, and one of the plurality of latches is detachably connected to one of the plurality of slots. Exemplarily, each latch corresponds to the slot one by one, so that when the latch is inserted into the slot, the plurality of latches can be used to support the discs so that there is a gap between adjacent discs.

[0018] In an optional implementation, the first disc includes a first disc body and a first connecting portion connected to each other; the second disc includes a second disc body and a second connecting portion connected to each other, and the first connecting portion and the second connecting portion are detachably connected. By providing a connecting portion on each disc, when the connecting portions included in adjacent discs cooperate with each other, the relative positions between the two adjacent discs are fixed, thus avoiding offset between the stacked discs and improving the reliability of the hard disk.

[0019] In an optional implementation, the first connection portion is a groove structure, and the second connection portion is a protrusion structure. Or, the second connection portion is a groove structure, and the first connection portion is a protrusion structure.

[0020] In an optional implementation, the hard disk of the present application further includes: a slide bar and a head arm. The extension direction of the slide bar is parallel to the axial direction of the sleeve; the head arm is fixedly connected to the magnetic head and slidably connected to the slide bar. In the present application, by slidably setting the head arm on the slide bar, the magnetic head can access the disks at different heights on the sleeve, and can effectively manage the data stored in each disk in the hard disk.

[0021] In an optional implementation, the hard disk of the present application further includes: a second magnetic head, which is arranged side by side with the first magnetic head along the extension direction of the aforementioned magnetic head arm. When the first magnetic head and the second magnetic head access one of the multiple disks, the first magnetic head is used to access the first track in one disk, and the second magnetic head is used to access the second track in one disk. In this way, when the magnetic head arm extends into one of the two adjacent disks, different magnetic heads can be used to access different tracks in the disk, so that the multiple magnetic heads fixed on the magnetic head arm can access more data in the disk per unit time, which is beneficial to improve the read and write bandwidth of the hard disk, thereby improving the data access performance of the hard disk.

[0022] In an optional implementation, the hard disk of the present application further includes: an auxiliary positioning structure, the extension direction of the auxiliary positioning structure is parallel to the axial direction of the sleeve, and is used to guide the magnetic head to align with the disk to be inserted.

[0023] In an optional implementation, the thickness of the hard disk is 12.5 mm-26 mm.

[0024] In a second aspect, the present application provides a storage system. The storage system includes: one or more hard disks provided in any optional manner in the first aspect, and a processor. The processor is used to access the aforementioned hard disks according to a data access request.

[0025] In a third aspect, the present application provides a storage component. The storage component includes: a sleeve, a first disc and a second disc. The sleeve is provided with a first hole structure, and the first hole structure runs through the inner wall and the outer wall of the sleeve. The first disc is sleeved on the sleeve and slidably connected to the sleeve; the second disc is sleeved on the sleeve and slidably connected to the sleeve. The projections of the first disc and the second disc in the axial direction of the sleeve are located on both sides of the first hole structure. Each disc can be sleeved on the sleeve in a stacked manner, so that a larger number of discs can be arranged on the sleeve, which is conducive to improving the storage capacity of the storage component. Moreover, a hole structure is provided on the sleeve, and during the data access process, the hole structure can be used to conduct air or other gases to open the adjacent discs (change from a stacked state to a separated state), so that the magnetic head can extend into the gap between the first disc and the second disc to access the data stored in the first disc or the second disc.

[0026] Optionally, the first hole structure includes a plurality of through holes, and the plurality of through holes are arranged at intervals along the circumference of the sleeve.

[0027] Optionally, the sleeve is further provided with a second hole structure, and the second hole structure penetrates the inner wall and the outer wall of the sleeve. The storage assembly further comprises: a third disc, which is located on a side of the second disc away from the first disc and is slidably connected to the sleeve. The projections of the third disc and the second disc in the axial direction of the sleeve are located on both sides of the second hole structure.

[0028] Optionally, projections of the first hole structure and the second hole structure in the circumferential direction of the sleeve do not overlap.

[0029] Optionally, the first disc includes a first disc body and a first connecting portion connected to each other. The second disc includes a second disc body and a second connecting portion connected to each other, and the first connecting portion and the second connecting portion are detachably connected.

[0030] Optionally, the first connection portion is a groove structure, and the second connection portion is a protrusion structure. Alternatively, the second connection portion is a groove structure, and the first connection portion is a protrusion structure.

[0031] Optionally, the storage assembly further comprises: an inflatable structure, provided with a gas delivery port, the gas delivery port and the first hole structure being detachably connected. If the gas delivery port and the first hole structure are in a connected state, the gas delivery port and the first hole structure are in communication.

[0032] Optionally, the inflatable structure is rotationally connected to the sleeve.

[0033] In a fourth aspect, the present application provides another storage component. The storage component includes: a sleeve, a first disc, a second disc and a support member. The sleeve is provided with a first assembly portion. The first disc is sleeved on the sleeve and is slidably connected to the sleeve; the second disc is sleeved on the sleeve and is slidably connected to the sleeve. The support member is detachably connected to the first assembly portion, and is used to support the first disc or the second disc, so that there is a gap between the first disc and the second disc. Each disc can be sleeved on the sleeve in a stacked manner, so that a larger number of discs can be arranged on the sleeve, which is conducive to increasing the storage capacity of the storage component; and, the multiple discs stacked on the sleeve are opened by the assembly portion and the support member, so that the magnetic head can extend between adjacent discs to access the data stored in the opened discs.

[0034] Optionally, the sleeve is further provided with a second assembly portion. The storage assembly further comprises: a third disc, which is located on a side of the second disc away from the first disc and is slidably connected to the sleeve. The support member is detachably connected to the second assembly portion and is also used to support the second disc or the third disc so that there is a gap between the second disc and the third disc.

[0035] Optionally, the first assembly portion includes a plurality of slots, which are spaced apart along the circumference of the sleeve. The support member includes a plurality of latches, which are spaced apart along the circumference of the sleeve, and one of the plurality of latches is detachably connected to one of the plurality of slots.

[0036] Optionally, the first disc includes a first disc body and a first connecting portion connected to each other. The second disc includes a second disc body and a second connecting portion connected to each other, and the first connecting portion and the second connecting portion are detachably connected.

[0037] Optionally, the first connection portion is a groove structure, and the second connection portion is a protrusion structure. Alternatively, the second connection portion is a groove structure, and the first connection portion is a protrusion structure.

[0038] In a fifth aspect, the present application provides a hard disk drive. The hard disk drive includes: a processor, and a storage component provided in any optional manner in the third aspect or the fourth aspect. The processor is used to control each component in the storage component according to an access request to access data stored in the disk.

[0039] In a sixth aspect, the present application provides a hard disk management method. The hard disk management method is applied to a hard disk, which includes: a sleeve, a plurality of discs, a magnetic head and a controller; the plurality of discs are all sleeved on the sleeve, including: adjacent first discs and second discs, the first disc is slidably connected to the sleeve, and the second disc is slidably connected to the sleeve. The hard disk management method provided by the present application includes: a controller receives a data access request, the data access request carries an address to be accessed; and the controller determines the first disc and the second disc to be opened based on the address carried by the data access request; then, the controller controls the magnetic head to extend between the first disc and the second disc to access the first disc or the second disc. In the present application, the discs in the hard disk are slidably connected to the sleeve, and each disc can be sleeved on the sleeve in a stacked manner, so that a larger number of discs can be set in a single hard disk, thereby increasing the storage capacity of the hard disk. Moreover, during the data access process, the processor controls the magnetic head to extend between different discs according to the address to be accessed, solving the problem that the magnetic head cannot access data due to the lack of gaps between the stacked discs.

[0040] In an optional implementation, the hard disk further includes: a separation component, a slide bar and a head arm, the separation component is arranged on the inner side of the sleeve, the extension direction of the slide bar is parallel to the axial direction of the sleeve, the head arm is fixedly connected to the head, and is slidably connected to the slide bar. The aforementioned controller controls the head to extend between the first disk and the second disk, including: the controller controls the separation component to open the first disk and the second disk, so that there is a gap between the first disk and the second disk; and the controller controls the head arm to slide along the extension direction of the slide bar, so that the head is aligned with the gap.

[0041] The beneficial effects of the second to sixth aspects above can be referred to the description of any optional method in the first aspect, which will not be repeated here. Based on the implementation methods provided by the above aspects, this application can also be further combined to provide more implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the structure of a general hard disk;

[0043] Figure 2 A schematic diagram of the structure of a hard disk provided in this application Figure 1 ;

[0044] Figure 3 A schematic diagram of the structure of a hard disk provided in this application Figure 2 ;

[0045] Figure 4A A schematic diagram of the structure of a disc provided for this application Figure 1 ;

[0046] Figure 4B A schematic diagram of the structure of a disc provided for this application Figure 2 ;

[0047] Figure 5A A schematic diagram of the structure of a magnetic head assembly provided in this application Figure 1 ;

[0048] Figure 5B A cross-sectional view of a magnetic head assembly provided in the present application;

[0049] Figure 6 A schematic diagram of the structure of a magnetic head assembly provided in this application Figure 2 ;

[0050] Figure 7 A schematic diagram of the structure of a magnetic head assembly provided in this application Figure 3 ;

[0051] Figure 8 for Figure 7 A cross-sectional view between a first assembly portion and a support member in a magnetic head assembly;

[0052] Fig. 9 A structural schematic diagram 4 of a magnetic head assembly provided for this application;

[0053] Fig.10 A flowchart of a hard disk management method provided in this application;

[0054] Fig.11 A comparison diagram of a hard disk provided in this application. DETAILED DESCRIPTION

[0055] The present application provides a hard disk, in which the disks are slidably connected to the sleeve, and each disk can be sleeved on the sleeve in a stacked manner, so that a larger number of disks can be arranged in a single hard disk, thereby increasing the storage capacity of the hard disk. Moreover, during data access, the magnetic head extends into the gap between different disks according to the address to be accessed, solving the problem that the magnetic head cannot access data due to the lack of gaps between the stacked disks.

[0056] The technical solutions involved in this application may be applied not only to current hard disk devices, but also to future hard disk devices, or storage systems including hard disk devices. The terms used in the implementation method section of this application are only used to explain the specific embodiments of this application, and are not intended to limit this application. The following is a brief introduction to some concepts that may be involved in this application.

[0057] Head: (header): The component that reads and writes the magnetic medium on the tape through the magnetic principle, which is divided into a write head and a read head. The write head records data by magnetizing and changing the magnetic field of the magnetic medium (such as magnetic powder), and the read head reads the data on the magnetic medium by sensing the magnetic field of the magnetic medium.

[0058] Disk: Also known as a platter, it is a round disk made of aluminum alloy or glass, coated with magnetic material, used to store data.

[0059] Spindle motor: It is the power source of the hard disk. The spindle motor drives the disk to rotate through the spindle.

[0060] In order to make the description of the following embodiments clear and concise, a brief introduction to the related technology is first given.

[0061] Figure 1 A schematic diagram of the structure of a common hard disk. Figure 1 The hard disk 100 includes: a spindle motor 110, a plurality of magnetic heads (a magnetic head 121, a magnetic head 122 and a magnetic head 123), a plurality of disks (a disk 131, a disk 132 and a disk 133) and a printed circuit board (PCB) 141.

[0062] In the hard disk 100 , multiple disks are arranged at intervals along the spindle motor 110 of the hard disk. The positions of the disks in the spindle motor 110 are fixed, and each disk is equipped with a magnetic head. For example, magnetic head 121 is used to access disk 131 , magnetic head 122 is used to access disk 132 , and magnetic head 123 is used to access disk 133 .

[0063] The disk is the core component of the hard disk 100. It is a round disk made of aluminum alloy or glass and coated with magnetic material. The magnetic head is a device for reading and writing data on the disk. The magnetic head includes a fixed magnetic head arm and a magnetic head. The spindle motor 110 is the power source of the hard disk. The spindle motor 110 drives the disk to rotate through the spindle. The PCB 141 is the control center of the hard disk 100, which is responsible for controlling the read and write operations of the hard disk 100.

[0064] During data access, the PCB 141 in the hard disk 100 controls the magnetic head among the multiple magnetic heads that matches the address information to access the disk corresponding to the magnetic head according to the address information carried in the data access request. The PCB 141 also includes a processor, such as a central processing unit (CPU) or other types of processors. In some examples, the PCB 141 may also refer to a driver circuit board.

[0065] Since space for the magnetic heads needs to be reserved between adjacent disks and the position of the disk spindle motor 110 in the hard disk is fixed, the number of disks that can be stored in a single hard disk is limited. As a result, the storage capacity of the hard disk cannot meet the growing data storage needs.

[0066] To solve the above problems, the embodiments of the present application provide a possible hard disk, such as Figure 2 As shown, Figure 2 A schematic diagram of the structure of a hard disk provided in this application Figure 1 The hard disk 200 includes a processor 210 , a memory 220 , an input output (IO) card 230 , a driver 241 , a motor 242 , a sleeve 250 , a plurality of disks, a slide bar 261 , a head arm 262 and a head 263 .

[0067] The processor 210 is the computing core and control core of the hard disk 200. The processor 210 can be a very large scale integrated circuit. An operating system and other software programs are installed in the processor 210, so that the processor 210 can access the memory and various PCIe devices. The processor 210 includes one or more processor cores. The processor core in the processor 210 is, for example, a CPU or other application specific integrated circuit (ASIC). The processor 210 can also be other general-purpose processors, digital signal processors (digital signal processing, DSP), field programmable gate arrays (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. In actual applications, the management device 130 may also include multiple processors.

[0068] The memory 220 may correspond to a storage medium for storing information such as execution information. The memory 220 may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the nonvolatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM) and direct rambus RAM (DR RAM). Memory 220 can be used to cache data to be written to a disk or data to be sent to other devices, etc.

[0069] The IO card 230 is used to receive a control request from the processor 210 and control the position of the head arm 262 on the slide bar 261 according to the control request so that the head can extend between the disks to access the data stored in the disks.

[0070] The motor 242 may also be referred to as a spindle motor of the hard disk 200 . The motor 242 is used to drive each disk to rotate by rotating the sleeve 250 .

[0071] Figure 2 The plurality of discs are all sleeved on the sleeve 250. Figure 2As shown, the plurality of discs include: adjacent first discs 251 and second discs 252. The first disc 251 is slidably connected to the sleeve 250, and the second disc 252 is slidably connected to the sleeve 250. Sliding connection refers to two objects in contact but not fixed to each other. When one object is fixed, the other object can slide along the contact surface of the two (slide left and right, slide up and down, or slide in other directions). In this embodiment, the first disc 251 can slide up and down along the axial direction of the sleeve 250, and the second disc 252 can also slide up and down along the axial direction of the sleeve 250.

[0072] The magnetic head 263 is used to extend between the first disk 251 and the second disk 252 to access the first disk 251 or the second disk 252 .

[0073] In this embodiment, the disks in the hard disk are slidably connected to the sleeve, and each disk can be stacked on the sleeve, so that more disks can be set in a single hard disk, thereby increasing the storage capacity of the hard disk. Moreover, during data access, the magnetic head extends between different disks according to the address to be accessed, solving the problem that the magnetic head cannot access data due to the lack of gaps between the stacked disks.

[0074] Please continue to see Figure 2 The extending direction of the slide bar 261 is parallel to the axial direction of the sleeve 250. The head arm 262 is fixedly connected to the head 263 and is slidably connected to the slide bar 261.

[0075] When the hard disk 200 receives a read / write IO request, the processor 210 drives the head arm 262 to slide along the slide bar 261 to the disk position corresponding to the address carried in the read / write IO request by controlling the driver 241, and the processor 210 is also used to open the disk corresponding to the aforementioned address so that the head 263 can extend into the disk to be accessed, such as the processor 210 opens the position between the first disk 251 and the second disk 252 mentioned above.

[0076] In order to more accurately control the head to access the disk corresponding to the address carried in the read and write IO request, Figure 2 Based on this, a possible implementation is provided, and an auxiliary positioning structure may also be provided in the hard disk 200, such as Figure 3 As shown, Figure 3 A schematic diagram of the structure of a hard disk provided in this application Figure 2 . Figure 3 and Figure 2 The difference is: Figure 3 A new auxiliary positioning structure 264 is added. The extension direction of the auxiliary positioning structure 264 is parallel to the axial direction of the sleeve 250, and is used to guide the magnetic head 263 to align with the disk to be inserted.

[0077] Exemplarily, the auxiliary positioning structure 264 can be a device based on laser positioning (laser positioning device), or other photoelectric detection devices that use photoelectric conversion to achieve positioning functions. Thus, the processor 210 can determine the disk position corresponding to the address to be accessed based on the laser positioning device, so that the magnetic head 263 can more accurately access the data stored in the disk and avoid errors in data reading and writing.

[0078] It is worth noting that in Figure 2 and Figure 3 In the hard disk 200 shown, except for the first disk 251 and the second disk 252 which are opened during the data access process, the other disks are overlapped (stacked) with the adjacent disks. Therefore, more disks can be arranged in the hard disk 200 to increase the storage capacity of the hard disk 200.

[0079] In the case where multiple disks are stacked in the sleeve 250, the hard disk 200 cannot move or shake. In order to keep the relative positions of the disks fixed and avoid access errors caused by the relative position changes between the disks, Figure 2 and Figure 3 Based on the first disc 251 and the second disc 252 provided, the embodiment of the present application provides a possible implementation method, such as Figure 4A As shown, Figure 4A A schematic diagram of the structure of a disc provided for this application Figure 1 .

[0080] like Figure 4A As shown, the first disc 251 includes a first disc body 251A and a first connecting portion 251B connected to each other; the second disc 252 includes a second disc body 252A and a second connecting portion 252B connected to each other.

[0081] The first connection portion 251B and the second connection portion 252B are detachably connected.

[0082] The following are Figure 4A The cases (1) and (2) in the figure are used as examples to illustrate the detachable connection of the two connecting parts.

[0083] exist Figure 4A In case (1), the first connection portion 251B is a protrusion structure, and the second connection portion 252B is a groove structure. The upper disk (first disk 251) cooperates with the groove structure included in the lower disk (second disk 252) through the protrusion structure, so that the two adjacent layers of disks are engaged, and a gap-free arrangement is achieved between adjacent disks, which is beneficial to increase the number of disks that can be installed in the hard disk and improve the storage capacity of the hard disk.

[0084] exist Figure 4AIn case (2), the first connection portion 251B is a groove structure, and the second connection portion 252B is a protrusion structure. The upper disk (first disk 251) cooperates with the protrusion structure included in the lower disk (second disk 252) through the groove structure, so that the two adjacent layers of disks are engaged, and a gap-free arrangement is achieved between adjacent disks, which is beneficial to increase the number of disks that can be installed in the hard disk and improve the storage capacity of the hard disk.

[0085] Figure 4A The specific structures of the two connecting parts (groove structure, protrusion structure) shown are only examples provided in this embodiment and should not be understood as limiting the present application. In some optional implementations, the above-mentioned connecting parts can also be other types of connecting parts, such as two connecting parts forming a mortise and tenon structure, one disc has a protruding part (or called: tenon or tenon head, etc.), and the other disc has a recessed part (or called: mortise, mortise or tenon groove). In addition, two adjacent discs can also be made into a structural design to prevent sliding friction, so as to achieve the function of fixing the relative position between multiple discs in a stacked state.

[0086] In one implementation, since each disk contains multiple tracks, in order to increase the read and write bandwidth of a single disk in a hard disk, Figures 2 to 4A Based on this, this embodiment provides a possible example, such as Figure 4B As shown, Figure 4B A schematic diagram of the structure of a disc provided for this application Figure 2 . Figure 4B The disc shown may be the aforementioned Figures 2 to 4A Any one of the discs shown in , the disc comprises: a plurality of tracks arranged along the radial direction of the disc, such as Figure 4B The first track 1, the second track 2, the third track 3, and so on. In the disk, these tracks are divided into multiple sectors for management, and each sector represents a disk block, such as sector 1. For example, the amount of data that can be stored in each sector is the same (such as the total capacity of each sector is 128×22=512 bytes), so the innermost sector has the highest data density.

[0087] Optionally, a plurality of magnetic heads are arranged side by side along the extension direction of the magnetic head arm 262 , such as a first magnetic head 2631 and a second magnetic head 2632 arranged side by side.

[0088] by Figure 4B For example, when the first head 2631 and the second head 2632 access a single disk, the first head 2631 is used to access the first track 1 in the disk, and the second head 2632 is used to access the second track 2 in the disk. Alternatively, the first head 2631 is used to access the second track 2 in the disk, and the second head 2632 is used to access the third track 3 in the disk.

[0089] It is worth noting that Figure 4B The distance between the two heads matches the gap between two adjacent tracks, but in some possible situations, the distance between the two heads can also be larger, so that the two heads can access two non-adjacent tracks in the disk at the same time. In some optional implementations, a larger number of heads can be provided on the head arm, such as n heads, where n is a positive integer greater than or equal to 3. This application does not limit the number of heads provided on the head arm, and all implementations of increasing the read and write bandwidth of the hard disk by changing the number of heads are included in the protection scope of this application.

[0090] In this way, when the head arm extends into one of the two adjacent disks, different heads can be used to access different tracks in the disk, so that the multiple heads fixed on the head arm can access more data in the disk per unit time, which is beneficial to improving the read and write bandwidth of the hard disk, thereby improving the data access performance of the hard disk.

[0091] When the hard disk 200 is in standby mode, the magnetic head 263 can be located on the upper side of the topmost disk among the multiple disks. Only when the hard disk 200 is in the process of data access, the magnetic head 263 will extend between the disks to be accessed. It should be understood that during the data access process, in addition to the magnetic head 263 extending between the disks, a certain gap should also be opened between adjacent disks. The width of the gap along the axial direction of the sleeve 250 should be greater than the height of the magnetic head along the axial direction of the sleeve 250, so as to avoid the problem of direct contact between the magnetic head 263 and the disk that does not need to be accessed, resulting in damage to the disk.

[0092] Based on this, this embodiment provides a possible implementation method. For example, the hard disk 200 mentioned above also includes a separation component, which is arranged on the inner side of the sleeve 250 for separating the first disk 251 and the second disk 252, or stacking the first disk 251 and the second disk 252.

[0093] Regarding the hardware implementation of the separation component, two possible implementation methods are provided below: 1. Separation and stacking of discs based on aerodynamics; 2. Separation (opening) and stacking of discs based on mechanical structure.

[0094] In a first possible implementation, the separation and stacking of the discs are achieved based on aerodynamics.

[0095] The following is based on Figure 2 and Figure 3 The hard disk 200 provided provides a possible embodiment, such as Figure 5A As shown, Figure 5A A schematic diagram of the structure of a magnetic head assembly provided in this application Figure 1 The magnetic head assembly comprises: Figure 2The sleeve 250 , the first disc 251 and the second disc 252 , as well as the first hole structure 271 and the inflation structure 273 are shown in FIG.

[0096] The magnetic head assembly may also include other disks ( Figure 5A not shown), Figure 5A The implementation of the separation assembly is only exemplified by taking the first disc 251 and the second disc 252 as examples.

[0097] The first hole structure 271 penetrates the inner wall and the outer wall of the sleeve 250. Exemplarily, the first hole structure 271 includes a plurality of through holes, and the plurality of through holes are arranged at intervals along the circumference of the sleeve 250. Since each disc is sleeved on the sleeve 250, a plurality of through holes (such as 2, 3, 4, 5, 6 or other numbers) are arranged in the circumference of the sleeve. When the plurality of through holes conduct air or other gas, the disc corresponding to the position of the plurality of through holes is opened, so that the magnetic head can extend into the gap between the first disc and the second disc to access the data stored in the first disc or the second disc. Moreover, the plurality of through holes can simultaneously guide the gas, so that the disc on the upper layer (such as the first disc) and the disc on the lower layer (such as the second disc) can be smoothly opened as a whole, avoiding the problem that one side of the disc on the upper layer is opened but the other side is still in contact with the disc on the lower layer, which is conducive to improving the service life of each disc in the hard disk.

[0098] If the first disk 251 and the second disk 252 are in a separated state, the axial projections of the first disk 251 and the second disk 252 in the sleeve 250 are located on both sides of the first hole structure. During data access, the hole structure can be used to conduct air or other gases to open the space between adjacent disks (change from a stacked state to a separated state), so that the magnetic head can extend into the gap between the first disk and the second disk to access the data stored in the first disk or the second disk.

[0099] Please continue to see Figure 5A The aforementioned separation component includes: an inflatable structure 273. The inflatable structure 273 is provided with a gas delivery port, and the gas delivery port is detachably connected to the first hole structure 271.

[0100] Below Figure 5A Based on Figure 5B For example, Figure 5B This is a cross-sectional view of a magnetic head assembly provided in the present application. The air filling structure 273 includes: an air delivery port 273A and a plurality of air guide tubes, one end of each air guide tube is connected to the air delivery port 273A, and the other end has an air outlet. For example, air guide tube 1 has air outlet 1, and air guide tube 2 has air outlet 2.

[0101] When the gas outlet is aligned with the hole structure on the sleeve, the hole structure can discharge gas, and the upward pressure provided by the discharged gas can open the two discs corresponding to the hole structure.

[0102] For example, if the gas delivery port of the inflatable structure 273 and the first hole structure are in a connected state, such as Figure 5B Middle outlet 1 and Figure 5A The through hole (black circle) on the left side of the first hole structure is aligned, and the air outlet 2 is aligned with the through hole (black circle) on the right side of the first hole structure, then the air supply port is connected to the first hole structure 271, and the air or other gas derived from the first hole structure 271 puts the first disc 251 and the second disc 252 in a separated state (or: open state).

[0103] As another example, if the gas delivery port of the inflatable structure 273 and the first hole structure are in an unconnected state, such as Figure 5B Middle outlet 1 and Figure 5A The through hole (black circle) on the left side of the first hole structure is not aligned, and the air outlet 2 is not aligned with the through hole (black circle) on the right side of the first hole structure, then the air delivery port and the first hole structure 271 are not connected, and the hole structure cannot conduct air or other gases, so that adjacent discs (such as the first disc 251 and the second disc 252) are in a stacked state.

[0104] In actual use, the inflatable structure may also include an air duct control component, which can control the air outlet of the air duct to slide up and down along the extension direction of the sleeve, so that the air outlet is aligned with different hole structures on the sleeve. Figure 5A and Figure 5B This is only an example provided in this embodiment. The number of air guide tubes included in the inflatable structure can be set according to the hole structure on the sleeve, such as 2, 3, 4, 5, 6 or other numbers, etc., and this application is not limited to this.

[0105] In an optional case, the above-mentioned inflatable structure 273 is rotatably connected to the sleeve 250. Exemplarily, the inflatable structure 273 can rotate in the sleeve to make the gas delivery port and the hole structure in the sleeve connected or disconnected, thereby controlling the position of the discs to be opened of the multiple discs mounted on the sleeve.

[0106] For the above-mentioned pore structure, Figure 5A Based on this, the present application also provides a possible example, such as Figure 6 As shown, Figure 6 A schematic diagram of the structure of a magnetic head assembly provided in this application Figure 2 . Figure 6 and Figure 5AThe difference is that the sleeve 250 is further provided with a second hole structure 272, and the second hole structure 272 penetrates the inner wall and the outer wall of the sleeve 250. The aforementioned plurality of discs also include: a third disc 253, which is located on a side of the second disc 252 away from the first disc 251 and is slidably connected to the sleeve 250.

[0107] If the second disc 252 and the third disc are in a separated state, the axial projections of the third disc and the second disc 252 in the sleeve 250 are located on both sides of the second hole structure.

[0108] Exemplarily, if the air delivery port of the inflatable structure 273 and the second hole structure 272 are in a connected state, the air delivery port and the second hole structure 272 are connected, and the air or other gas derived from the second hole structure 272 causes the second disc 252 and the third disc 253 to be in a separated state (or: open state).

[0109] As another example, if the gas delivery port of the inflatable structure 273 and the second hole structure 272 are in an unconnected state, the gas delivery port and the second hole structure 272 are not connected, and the hole structure cannot conduct air or other gases, so that adjacent discs (such as the second disc 252 and the third disc 253) are in a stacked state.

[0110] like Figure 6 As shown, the projections of the first hole structure 271 and the second hole structure 272 in the circumferential direction of the sleeve 250 do not overlap. Therefore, in the circumferential direction of the sleeve 250, the hole structures do not overlap, which is beneficial to improving the structural stability of the sleeve.

[0111] exist Figure 6 In the embodiment, the inflatable structure 273 is rotatably connected to the sleeve 250. Exemplarily, the inflatable structure 273 can be rotated in the sleeve to make the gas delivery port and the hole structure in the sleeve connected or disconnected, so that the disconnected hole structure does not output air or other gases, and the connected hole structure outputs air or other gases, thereby controlling the positions of the multiple discs to be opened on the sleeve.

[0112] It is worth noting that in some possible embodiments, the projections of the various hole structures on the circumference of the sleeve 250 do not overlap. Therefore, when the inflatable structure 273 rotates on the inner side of the sleeve 250, the air supply port can be aligned with the different hole structures provided on the sleeve 250. The air or other gas derived from each hole structure is used to open the different disks stacked on the sleeve 250, so as to achieve precise control of the separation or stacking of the disks in the hard disk 200.

[0113] The relative positions of the various hole structures in the circumferential direction of the sleeve 250 are determined according to the number of stacked discs.

[0114] Exemplarily, the center angle α formed between the circumferential projection of the adjacent hole structures on the sleeve 250 and the central axis of the air-filled structure 273 is 360° / N, where N is the number of disks stacked on a single sleeve in the hard disk.

[0115] For example, if the number of stacked disks in the hard disk is 90, the center angle formed by the projection of two adjacent hole structures on the circumference of the sleeve 250 and the central axis of the inflatable structure 273 is 4°. That is, the inflatable structure aligns with a layer of hole structures to release air every 4° rotation and maintains the disk on the upper layer.

[0116] For another example, if the number of stacked disks in the hard disk is 60, the center angle formed by the projection of two adjacent hole structures on the circumference of the sleeve 250 and the central axis of the inflatable structure 273 is 6°. That is, the inflatable structure aligns with a layer of hole structures to release air every 6° rotation and maintains the disk on the upper layer.

[0117] For example, if the number of stacked disks in a hard disk is 45, the center angle formed by the projection of two adjacent hole structures on the circumference of the sleeve 250 and the central axis of the inflatable structure 273 is 8°. That is, the inflatable structure aligns with a layer of hole structures to release air every 8° rotation, and maintains the disk on the upper layer.

[0118] The above three examples are only optional methods provided by this embodiment. If the number of disks mounted on a single sleeve in the hard disk is different, the center angle formed by the circumferential projection of the two adjacent hole structures on the sleeve 250 and the central axis of the inflatable structure 273 will be different, which will not be elaborated in this application. For example, the number of disks can be a positive integer greater than or equal to 2, and the maximum number of disks can be determined based on the minimum thickness of a single disk and the thickness of the hard disk frame. Based on the fact that the thickness of the thinnest glass substrate is 0.12mm and the thickness of a 3.5-inch hard disk frame is 26mm, the maximum number of disks can be (26mm-2×2mm) / (2×0.12mm)≈90, where 2mm is the thickness of the single-side shell of the hard disk frame, and 2×0.12mm is the set thickness reserved for a single disk during the manufacturing process to ensure that each disk has better data access performance.

[0119] For example, the distance between two adjacent hole structures is related to the distance between two adjacent discs. If the thickness of the disc is 0.24 mm, the distance between the centers of the two adjacent hole structures along the axial direction of the sleeve is 0.24 mm or slightly larger than 0.24 mm, such as 0.241 mm, 0.242 mm, 0.243 mm, 0.244 mm, 0.245 mm, 0.246 mm or other values.

[0120] In some other possible embodiments, the projections of the various hole structures on the circumference of the sleeve 250 overlap, and the inflatable structure 273 slides up and down along the axial direction of the sleeve 250 so that the air delivery port is aligned with the different hole structures provided on the sleeve 250. The air or other gas derived from each hole structure is used to open the different disks stacked on the sleeve 250, so as to achieve precise control of the separation or stacking of the disks in the hard disk 200.

[0121] Regarding the hardware implementation of the separation components, a second possible implementation is provided below.

[0122] In a second possible implementation, the separation (opening) and stacking of the discs are achieved based on a mechanical structure.

[0123] The following is based on Figure 2 and Figure 3 The hard disk 200 provided provides a possible embodiment, such as Figure 7 As shown, Figure 7 A schematic diagram of the structure of a magnetic head assembly provided in this application Figure 3 The magnetic head assembly comprises: Figure 2 The sleeve 250 , the first disc 251 and the second disc 252 , as well as the first fitting portion 281 and the support member 283 are shown in FIG.

[0124] The magnetic head assembly may also include other disks ( Figure 7 not shown), Figure 5A The implementation of the separation assembly is only exemplified by taking the first disc 251 and the second disc 252 as examples.

[0125] See also Figure 7 The sleeve 250 is provided with a first assembly portion 281. The aforementioned separation assembly includes: a support member 283, which is detachably connected to the first assembly portion 281. The support member 283 is used to support the first disc 251 or the second disc 252, so that there is a gap between the first disc 251 and the second disc 252.

[0126] Exemplarily, the support member 283 may be a retractable structure that can extend from the inside to the outside of the sleeve 250. For example, the support member 283 includes a plurality of latches, and the plurality of latches are arranged at intervals along the circumference of the sleeve 250.

[0127] Accordingly, the first assembly portion 281 includes a plurality of slots, which are arranged at intervals along the circumference of the sleeve 250. Figure 7 In the diagram, each slot corresponds to a black square shape.

[0128] Regarding the process of the support member 283 and the first assembly portion 281 cooperating with each other to open the disc, this embodiment provides a possible example, such as Figure 8As shown, Figure 8 for Figure 7 The support member 283 includes: a plurality of latches arranged at intervals along the axial direction of the sleeve 250, such as latches 1 to 4; the first assembly portion 281 includes: a plurality of slots arranged at intervals along the circumferential direction of the sleeve 250.

[0129] The plurality of plugs and the plurality of sockets are detachably connected in a one-to-one correspondence. For example, plug 1 corresponds to socket 1, plug 2 corresponds to socket 2, plug 3 corresponds to socket 3, and plug 4 corresponds to socket 4. When the plugs and the sockets are connected in cooperation with each other, the plurality of plugs can be used to support the disc to be opened.

[0130] For example, each latch can be made into a prismatic structure, a wedge-shaped structure (such as Figure 8 As shown in the figure, other arc-shaped structures can also be made to reduce the wear of the disc caused by the pin extending from the assembly portion or retracting into the sleeve, thereby increasing the service life of the disc. Each pin corresponds to each slot arranged along the circumference of the sleeve 250, so that when the pin extends into the slot, the multiple pins can be used to support the disc, so that there is a gap between adjacent discs.

[0131] In this example, the multiple disks stacked on the sleeve are opened by the assembly portion and the support member, so that the magnetic head can extend between adjacent disks to access the data stored in the opened disks.

[0132] It is worth noting that Figure 8 The support member includes 4 latches as an example for explanation, but in some possible examples, the support member may also include more or fewer latches, such as 2 latches, 3 latches, 5 latches or other numbers, etc., which is not limited in the present application. In this embodiment, the extension and retraction of each latch can be achieved by Figure 2 The drive member 241, motor 242 or other drive devices are used to achieve this, which will not be described in detail here.

[0133] The key point of this embodiment is to introduce a latch design for dynamically separating the disks, so that the storage capacity on the disks can be dynamically displayed temporarily for the magnetic head to read and write, thereby increasing the number of disks in the hard disk and expanding the storage capacity of the hard disk.

[0134] It should be understood that in order to open different disks in the magnetic head assembly, other assembly parts may be provided on the sleeve. Figure 7 Based on this, a possible example is provided, such as Fig. 9 As shown, Fig. 9 A fourth structural schematic diagram of a magnetic head assembly provided for this application. Fig. 9 and Figure 7The difference is that the sleeve 250 is further provided with a second assembly portion 282, and the second assembly portion 282 also includes a plurality of slots arranged along the circumference of the sleeve 250. The aforementioned plurality of discs also include: a fourth disc 254, which is located on a side of the first disc 251 away from the second disc 252 and is slidably connected to the sleeve 250.

[0135] The support member 283 is detachably connected to the second assembly portion 282 , and is further used to support the first disc 251 or the fourth disc 254 , so that there is a gap between the first disc 251 and the fourth disc 254 .

[0136] In this example, different assembly parts correspond to gaps to be opened between different disks, so that when the support member is connected to different assembly parts, the support member can open different disks, allowing the magnetic head to extend between adjacent disks to access data stored in the opened disks.

[0137] In this example, the thickness of the hard disk 200 is 12.5 mm-26 mm. For a 2.5-inch hard disk frame, the thickness of the hard disk 200 can be set to 12.5 mm, and multiple stacked disks are set in the hard disk to increase the number of disks and storage capacity that the 2.5-inch hard disk frame can accommodate. For a 3.5-inch hard disk frame, the thickness of the hard disk 200 can be set to 26 mm, and multiple stacked disks are set in the hard disk to increase the number of disks and storage capacity that the 3.5-inch hard disk frame can accommodate. Of course, the thickness of the hard disk 200 can also be 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm or other values, such as 13.5mm, 14.5mm, 15.5mm, 16.5mm, 17.5mm, 18.5mm, 19.5mm, 20.5mm, 21.5mm, 22.5mm, 23.5mm, 24.5mm, 25.5mm or other possible values, etc.

[0138] It should be understood that the storage components provided in the embodiments of the present application may exist independently or may be arranged in a hard disk, and the present application is not limited to this.

[0139] Based on the hard disks provided in the above embodiments, the present application also provides a hard disk management method, which is applied to the hard disks provided in any of the above embodiments, such as Fig.10 As shown, Fig.10 This is a flowchart of a hard disk management method provided by the present application. The hard disk management method includes the following steps S101 to S103.

[0140] S101 : The processor 210 receives a data access request.

[0141] The data access request carries the address to be accessed.

[0142] S102: The processor 210 determines a first disc and a second disc to be opened based on the address carried in the data access request.

[0143] It is worth noting that the address carried in the above data access request may also indicate other disks among the multiple disks included in the hard disk, and this application is not limited to this.

[0144] S103: The processor 210 controls the magnetic head to extend between the first disk and the second disk to access the first disk or the second disk.

[0145] In this embodiment, the disks in the hard disk are slidably connected to the sleeve, and each disk can be stacked on the sleeve, so that a larger number of disks can be arranged in a single hard disk, thereby increasing the storage capacity of the hard disk. Moreover, during data access, the processor controls the magnetic head to extend between different disks according to the address to be accessed, thereby solving the problem that the magnetic head cannot access data due to the lack of gaps between the stacked disks.

[0146] As an optional implementation method, with respect to the above step S103, this embodiment also provides a possible example: the processor 210 controls the separation component to open the first disk and the second disk so that there is a gap between the first disk and the second disk; the processor 210 controls the head arm to slide along the extension direction of the sliding rod so that the head is aligned with the gap.

[0147] It should be understood that Figure 2 Only one set of slide bar + head arm + head is shown, but more sets of access components (such as 2 sets, 3 sets, 4 sets or other numbers, etc.) can be arranged in the hard disk, each set of access components can include a head arm and a head, and these multiple sets of access components can be arranged on one slide bar, and these multiple sets of access components can be arranged on different slide bars respectively.

[0148] For more information about the hard disk management method and its beneficial effects, please refer to the above Figures 2 to 9 The description is not repeated here.

[0149] In order to further illustrate the beneficial effects of the embodiments of the present application, Fig.11 An example of a possible comparison is provided, Fig.11 A comparison diagram of a hard disk provided in this application.

[0150] Fig.11 Case (1) corresponds to the structure of a hard disk in conventional technology. The magnetic heads are fixed and spaced apart from each other, and a gap must be reserved between the magnetic heads. Only 10-13 disks can be arranged in a 3.5-inch hard disk frame, and the storage capacity of the hard disk is relatively small.

[0151] Fig.11 Case (2) corresponds to the structure of the hard disk in the present application, and the hard disk is in standby mode, the magnetic head can slide on the slide bar following the magnetic head arm, and there is no need to reserve a gap between the disks for the magnetic head.

[0152] Fig.11 Case (3) corresponds to the structure of the hard disk in the present application, and the hard disk is in use, the magnetic head can slide on the slide bar following the magnetic head arm, and the hard disk opens or closes (stacks) the disk according to the address to be accessed.

[0153] exist Fig.11 In case (2) and case (3), about 45-90 disks can be set in the 3.5-inch hard disk frame, which greatly increases the number of disks that can be set in the hard disk frame and increases the storage capacity of the hard disk frame.

[0154] The present application also provides a storage system. The storage system includes a hard disk provided by any of the aforementioned embodiments, and a controller. The hard disk is used to store data, and the controller is used to access the hard disk according to a data access request. The storage system is, for example, a centralized storage system or a distributed storage system, or a computer / server using a hard disk as a persistent storage medium.

[0155] The processor includes one or more processor cores, and the processor can be a very large scale integrated circuit. The processor is installed with an operating system and other software programs, so that the processor can access the hard disk and various peripheral component interconnect express (PCIe) devices. The processor includes one or more processor cores. The processor core in the processor is, for example, a CPU or other ASIC. The processor can also be other general-purpose processors, DSPs, ASICs, FPGAs or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. In practical applications, the storage system can also include multiple controllers.

[0156] Optionally, the storage system may also include but is not limited to other storage media: dynamic random access memory (DRAM), static random access memory (SRAM), etc., which are used to cache data from the hard disk for processing by the processor. In addition, other storage media may also be read-only memory (ROM). As for read-only memory, for example, it may be programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), etc. This embodiment does not limit the number and type of other storage media. In addition, other storage media may be configured to have a power-saving function. The power-saving function means that when the system loses power and then powers on again, the data stored in the memory will not be lost. Storage media with a power-saving function are called non-volatile memories.

[0157] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Various equivalent modifications or replacements are conceivable within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A hard disk, characterized in that: include: Sleeve; A plurality of discs are sleeved on the sleeve, including: a first disc and a second disc adjacent to each other; the first disc is slidably connected to the sleeve, and the second disc is slidably connected to the sleeve; The first magnetic head is used to extend between the first disk and the second disk to access the first disk or the second disk.

2. The hard disk according to claim 1, characterized in that: Also includes: A separation assembly is arranged on the inner side of the sleeve and is used to separate the first disc and the second disc, or to stack the first disc and the second disc.

3. The hard disk according to claim 2, characterized in that: The sleeve is provided with a first hole structure, and the first hole structure penetrates the inner wall and the outer wall of the sleeve; If the first disc and the second disc are in a separated state, the projections of the first disc and the second disc in the axial direction of the sleeve are located on both sides of the first hole structure.

4. The hard disk according to claim 3, characterized in that: The separation component comprises: An inflatable structure, provided with a gas delivery port, wherein the gas delivery port and the first hole structure are detachably connected; If the gas delivery port and the first hole structure are in a connected state, the gas delivery port and the first hole structure are in communication.

5. The hard disk according to claim 4, characterized in that: The inflatable structure is rotatably connected to the sleeve.

6. The hard disk according to any one of claims 3 to 5, characterized in that: The first hole structure includes a plurality of through holes, and the plurality of through holes are arranged at intervals along the circumference of the sleeve.

7. The hard disk according to any one of claims 3 to 6, characterized in that: The sleeve is further provided with a second hole structure, and the second hole structure penetrates the inner wall and the outer wall of the sleeve; The plurality of discs also include: a third disc, located on a side of the second disc away from the first disc and slidably connected to the sleeve; If the second disc and the third disc are in a separated state, the projections of the third disc and the second disc in the axial direction of the sleeve are located on both sides of the second hole structure.

8. The hard disk according to claim 7, characterized in that: The projections of the first hole structure and the second hole structure in the circumferential direction of the sleeve do not overlap.

9. The hard disk according to claim 2, characterized in that: The sleeve is provided with a first assembly portion; The separation assembly includes a support member, which is detachably connected to the first assembly portion and is used to support the first disc or the second disc so that a gap exists between the first disc and the second disc.

10. The hard disk according to claim 9, characterized in that: The sleeve is further provided with a second assembly portion; The hard disk also includes: a fourth disc, located on a side of the first disc away from the second disc and slidably connected to the sleeve; The support member is detachably connected to the second assembly portion, and is also used to support the first disc or the fourth disc so that there is a gap between the first disc and the fourth disc.

11. The hard disk according to claim 9 or 10, characterized in that: The first assembly portion includes a plurality of slots, and the plurality of slots are arranged at intervals along the circumference of the sleeve; The support member includes a plurality of latches, which are arranged at intervals along the circumference of the sleeve, and one of the plurality of latches is detachably connected to one of the plurality of slots.

12. The hard disk according to any one of claims 1 to 11, characterized in that: The first disc includes a first disc body and a first connecting portion connected to each other; The second disc includes a second disc body and a second connecting portion that are connected to each other, and the first connecting portion and the second connecting portion are detachably connected.

13. The hard disk according to claim 12, characterized in that: The first connection portion is a groove structure, and the second connection portion is a convex structure; Alternatively, the second connection portion is a groove structure, and the first connection portion is a protrusion structure.

14. The hard disk according to any one of claims 1 to 13, characterized in that: Also includes: A slide rod, wherein the extension direction of the slide rod is parallel to the axial direction of the sleeve; The magnetic head arm is fixedly connected to the first magnetic head and slidably connected to the sliding rod.

15. The hard disk according to claim 14, characterized in that: Also includes: A second magnetic head is arranged side by side with the first magnetic head along the extension direction of the magnetic head arm; When the first head and the second head access one disk among the multiple disks, the first head is used to access a first track in the disk, and the second head is used to access a second track in the disk.

16. The hard disk according to any one of claims 1 to 15, characterized in that: Also includes: An auxiliary positioning structure, wherein the extending direction of the auxiliary positioning structure is parallel to the axial direction of the sleeve, and is used to guide the first magnetic head to align with the disk to be inserted.

17. The hard disk according to any one of claims 1 to 16, characterized in that: The thickness of the hard disk is 12.5 mm-26 mm.

18. A hard disk management method, characterized in that: Applied to a hard disk, the hard disk comprises: a sleeve, a plurality of disks, a magnetic head and a controller; The plurality of discs are all sleeved on the sleeve, including: a first disc and a second disc adjacent to each other, the first disc is slidably connected to the sleeve, and the second disc is slidably connected to the sleeve; The method comprises: The controller receives a data access request, wherein the data access request carries an address to be accessed; The controller determines the first disc and the second disc to be opened based on the address carried by the data access request; The controller controls the magnetic head to extend between the first disk and the second disk to access the first disk or the second disk.

19. The method according to claim 18, characterized in that The hard disk further comprises: a separation component, a slide bar and a magnetic head arm, wherein the separation component is arranged inside the sleeve, the extension direction of the slide bar is parallel to the axial direction of the sleeve, and the magnetic head arm is fixedly connected to the magnetic head and slidably connected to the slide bar; The controller controls the magnetic head to extend between the first disk and the second disk, including: The controller controls the separation assembly to open the first disc and the second disc so that there is a gap between the first disc and the second disc; The controller controls the magnetic head arm to slide along the extending direction of the slide bar so that the magnetic head is aligned with the gap.

20. A storage system, characterized in that: include: One or more hard disks according to any one of claims 1 to 17; The processor is used to access the hard disk according to a data access request.

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