Hard disk, hard disk management method, and storage system

Abstract

Disclosed are a hard disk, a hard disk management method, and a storage system, relating to the technical field of storage. Platters in the hard disk are slidably connected to a sleeve, and the platters can be sleeved on the sleeve in a stacked mode, such that more platters can be arranged in a single hard disk, thereby increasing the storage capacity of the hard disk. Additionally, in a data access process, a head extends into different platters on the basis of an address to be accessed, thereby solving the problem of the head being unable to access data caused by absence of gaps between the stacked platters.

Description

Hard disk, hard disk management method and storage system

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on September 14, 2023, with application number 202311191333.2 and application name “A Hard Disk, Hard Disk Management Method and Storage System”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] 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

[0003] With the development of storage media technology, the storage capacity of hard drives is increasing. A single hard drive can store one or more platters (also known as disks) for storing data. The hard drive also includes components such as a spindle motor, multiple heads, and a driver circuit board. In a hard drive, multiple disks are spaced apart along the hard drive's spindle motor, and each disk is equipped with a head. During data access, the hard drive controls the head that matches the address information carried in the data access request to access the disk corresponding to the head. Because space must be reserved between adjacent disks for the heads, and the position of the disks in the hard drive's spindle motor is fixed, the number of disks that can be stored in a single hard drive is limited. Consequently, the storage capacity of the hard drive cannot meet the growing demand for data storage.

[0004] Summary of the Invention

[0005] 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 can be provided by a single hard disk.

[0006] In a first aspect, the present application provides a hard disk. The hard disk comprises a sleeve, multiple disks, and a magnetic head. The multiple disks are mounted on the sleeve and include a first disk and a second disk adjacent to each other. The first disk is slidably connected to the sleeve, and the second disk is slidably connected to the sleeve. The magnetic head is configured to extend between the first disk and the second disk to access the first disk or the second disk.

[0007] In this application, the disks in the hard drive are slidably connected to the sleeve, and the disks can be stacked on the sleeve, allowing a larger number of disks to be installed in a single hard drive, thereby increasing the hard drive's storage capacity. Furthermore, during data access, the magnetic head extends between different disks based on the address to be accessed, solving the problem of the magnetic head being unable to access data due to a lack of gaps between stacked disks.

[0008] 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.

[0009] For example, if the separation component places the first disk and the second disk in a separated state, the magnetic head can extend into the gap between the first disk and the second disk to access data stored in the first disk or the second disk.

[0010] For another example, if the separation assembly places the first disc and the second disc in a stacked state, more discs can be arranged in the hard disk, which is beneficial to increasing the storage capacity of the hard disk.

[0011] In an optional implementation, the sleeve is provided with a first hole structure that extends through the inner and outer walls of the sleeve. If the first disk and the second disk are in a separated state, the projections of the first disk and the second disk in the axial direction of the sleeve are located on both sides of the first hole structure. In the present application, the sleeve is provided with a hole structure that can be used to conduct air or other gas during data access to open the gap between adjacent disks (changing from a stacked state to a separated state), thereby allowing the magnetic head to extend into the gap between the first disk and the second disk to access data stored on the first disk or the second disk.

[0012] In one optional implementation, the separation assembly includes an inflatable structure having a gas inlet, the gas inlet being detachably connected to a first hole structure. When the gas inlet and the first hole structure are connected, the gas inlet and the first hole structure are in communication. Furthermore, when the gas inlet and the hole structure are disconnected, the gas inlet and the hole structure are disconnected, preventing the hole structure from conducting air or other gas, thereby allowing adjacent discs to be stacked.

[0013] In an optional implementation, the inflatable structure is rotatably connected to the sleeve. For example, the inflatable structure can rotate within the sleeve to connect or disconnect the gas delivery port and the hole structure within the sleeve, thereby controlling the position of the multiple discs mounted on the sleeve to be opened.

[0014] In an optional implementation, the first hole structure includes a plurality of through holes, which are spaced apart along the circumference of the sleeve. Since each disk is sleeved on the sleeve, the plurality of through holes are provided along the circumference of the sleeve. When air or other gas is passed through the plurality of through holes, the disks corresponding to the plurality of through holes are opened, allowing the magnetic head to extend into the gap between the first disk and the second disk to access data stored on the first disk or the second disk.

[0015] In an optional implementation, the sleeve is further provided with a second hole structure, which passes through 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 axial projections of the third disc and the second disc in 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 gas to open the gap between 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.

[0016] In an optional implementation, the projections of the first and second hole structures on the circumference of the sleeve do not overlap. Disposing different hole structures circumferentially on the sleeve allows the gas delivery port of the inflatable structure to communicate with different hole structures during rotation, thereby opening discs at different locations on the sleeve.

[0017] In one optional implementation, the sleeve is provided with a first assembly portion. The separation assembly includes a support member detachably connected to the first assembly portion and configured to support the first disk or the second disk, thereby providing a gap between the first disk and the second disk. In this application, the assembly portion and the support member are used to open multiple disks stacked on the sleeve, allowing the magnetic head to extend between adjacent disks to access data stored on the opened disks.

[0018] In an optional implementation, the sleeve is further provided with a second assembly portion. The hard disk further 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 further used to support the first disc or the fourth disc, so that a gap exists 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, allowing the magnetic head to extend between adjacent discs to access data stored in the already opened discs.

[0019] In one optional implementation, the first assembly portion includes a plurality of slots spaced apart along the circumference of the sleeve. The support member includes a plurality of pins spaced apart along the circumference of the sleeve, with one of the plurality of pins being removably connected to one of the plurality of slots. Exemplarily, each pin corresponds to a slot, such that when a pin is inserted into a slot, the plurality of pins can support the discs, providing a gap between adjacent discs.

[0020] In one optional implementation, the first disk includes a first disk body and a first connecting portion that are interconnected; the second disk includes a second disk body and a second connecting portion that are interconnected, and the first connecting portion and the second connecting portion are detachably connected. By providing a connecting portion on each disk, when the connecting portions of adjacent disks engage with each other, the relative position of the two adjacent disks is fixed, preventing offset between the stacked disks and improving the reliability of the hard drive.

[0021] In an optional implementation, the first connecting portion is a groove structure, and the second connecting portion is a protrusion structure. Alternatively, the second connecting portion is a groove structure, and the first connecting portion is a protrusion structure.

[0022] In one optional implementation, the hard drive of the present application further includes a slide bar and a head arm. The slide bar extends 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, the head arm, which is slidable on the slide bar, enables the magnetic head to access disks at different heights on the sleeve, effectively managing the data stored on each disk in the hard drive.

[0023] 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 improving the read and write bandwidth of the hard disk, thereby improving the data access performance of the hard disk.

[0024] 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.

[0025] In an optional implementation, the thickness of the hard disk is 12.5 mm-26 mm.

[0026] In a second aspect, the present application provides a storage system comprising: one or more hard disks provided in any optional manner according to the first aspect, and a processor configured to access the hard disks according to a data access request.

[0027] In a third aspect, the present application provides a storage assembly. The storage assembly includes: a sleeve, a first disc, and a second disc. The sleeve is provided with a first hole structure that extends through the inner and outer walls of the sleeve. The first disc is mounted on the sleeve and slidably connected to the sleeve; the second disc is mounted on the sleeve and slidably connected to the sleeve. The axial projections of the first disc and the second disc on the sleeve are located on either side of the first hole structure. The discs can be mounted on the sleeve in a stacked manner, allowing a larger number of discs to be mounted on the sleeve, thereby increasing the storage capacity of the storage assembly. Furthermore, the sleeve is provided with a hole structure that, during data access, can be used to conduct air or other gas, opening the gap between adjacent discs (changing from a stacked state to a separated state), thereby allowing a magnetic head to extend into the gap between the first and second discs to access data stored on the first or second disc.

[0028] 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.

[0029] Optionally, the sleeve further comprises a second hole structure extending through the inner and outer walls of the sleeve. The storage assembly further comprises a third disc located on a side of the second disc away from the first disc and slidably connected to the sleeve. The axial projections of the third disc and the second disc in the sleeve are located on either side of the second hole structure.

[0030] Optionally, projections of the first hole structure and the second hole structure in the circumferential direction of the sleeve do not overlap.

[0031] 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.

[0032] Optionally, the first connecting portion is a groove structure, and the second connecting portion is a protrusion structure. Alternatively, the second connecting portion is a groove structure, and the first connecting portion is a protrusion structure.

[0033] Optionally, the storage assembly further comprises: an inflatable structure having a gas delivery port, the gas delivery port being detachably connected to the first hole structure. 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.

[0034] Optionally, the inflatable structure is rotationally connected to the sleeve.

[0035] 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. The discs 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 beneficial 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.

[0036] Optionally, the sleeve further comprises a second mounting portion. The storage assembly further comprises a third disc located on a side of the second disc away from the first disc and slidably connected to the sleeve. The support member is detachably connected to the second mounting portion and is further configured to support the second disc or the third disc, ensuring a gap between the second disc and the third disc.

[0037] Optionally, the first assembly portion includes a plurality of slots spaced apart along the circumference of the sleeve, the support member includes a plurality of latches 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.

[0038] 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.

[0039] Optionally, the first connecting portion is a groove structure, and the second connecting portion is a protrusion structure. Alternatively, the second connecting portion is a groove structure, and the first connecting portion is a protrusion structure.

[0040] 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 according to the third aspect or the fourth aspect. The processor is configured to control components in the storage component according to an access request to access data stored on a disk.

[0041] In a sixth aspect, the present application provides a hard disk management method. This hard disk management method is applied to a hard disk, which includes: a sleeve, multiple disks, a magnetic head, and a controller. The multiple disks are mounted on the sleeve and include: a first disk and a second disk adjacent to each other, the first disk being slidably connected to the sleeve, and the second disk being slidably connected to the sleeve. The hard disk management method provided by this application includes: a controller receiving a data access request, the data access request carrying an address to be accessed; and, based on the address carried in the data access request, the controller determining the first and second disks to be opened; and then, the controller controlling the magnetic head to extend between the first and second disks to access the first or second disk. In this application, the disks in the hard disk are slidably connected to the sleeve, and the disks can be stacked on the sleeve, allowing a larger number of disks to be accommodated in a single hard disk, thereby increasing the hard disk's storage capacity. Furthermore, during data access, the processor controls the magnetic head to extend between different disks based on the address to be accessed, solving the problem of the magnetic head being unable to access data due to a lack of clearance between stacked disks.

[0042] In an optional implementation, the hard disk further includes: a separation assembly, a slide bar, and a head arm. The separation assembly is disposed inside the sleeve, the slide bar extending in a direction parallel to the axial direction of the sleeve, and the head arm is fixedly connected to the head and slidably connected to the slide bar. The controller controls the head to extend between the first and second disks, including: the controller controlling the separation assembly to open the first and second disks to create a gap between the first and second disks; and the controller controlling the head arm to slide along the extending direction of the slide bar to align the head with the gap.

[0043] Regarding the beneficial effects of the second to sixth aspects above, reference can be made to the description of any optional method in the first aspect, which will not be repeated here. Based on the implementation methods provided in the above aspects, this application can also be further combined to provide more implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] FIG1 is a schematic structural diagram of a general hard disk;

[0045] FIG2 is a structural diagram of a hard disk provided by the present application;

[0046] FIG3 is a second structural diagram of a hard disk provided by the present application;

[0047] FIG4A is a first structural diagram of a disc provided by the present application;

[0048] FIG4B is a second structural diagram of a disc provided by the present application;

[0049] FIG5A is a structural schematic diagram 1 of a magnetic head assembly provided by the present application;

[0050] FIG5B is a cross-sectional view of a magnetic head assembly provided by the present application;

[0051] FIG6 is a second structural diagram of a magnetic head assembly provided by the present application;

[0052] FIG7 is a third structural diagram of a magnetic head assembly provided by the present application;

[0053] FIG8 is a cross-sectional view between the first assembly portion and the support member in the magnetic head assembly of FIG7;

[0054] FIG9 is a fourth structural diagram of a magnetic head assembly provided by the present application;

[0055] FIG10 is a flow chart of a hard disk management method provided by the present application;

[0056] FIG11 is a comparison diagram of a hard disk provided in this application. DETAILED DESCRIPTION

[0057] This application provides a hard disk in which the disks are slidably connected to a sleeve. The disks can be stacked and mounted on the sleeve, allowing a larger number of disks to be installed in a single hard disk, thereby increasing the storage capacity of the hard disk. Furthermore, during data access, the magnetic head extends into the gaps between different disks according to the address to be accessed, thus solving the problem of the magnetic head being unable to access data due to the lack of gaps between stacked disks.

[0058] 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 methods 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.

[0059] Head: The component that reads and writes magnetic media on a tape using magnetic principles. It 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), while the read head reads the data on the magnetic medium by sensing the magnetic field of the magnetic medium.

[0060] Platter: Also known as a platter, it is a circular disk made of aluminum alloy or glass, coated with magnetic material, used to store data.

[0061] Spindle motor: It is the power source of the hard disk. The spindle motor drives the disk to rotate through the spindle.

[0062] In order to make the description of the following embodiments clear and concise, a brief introduction to the relevant technology is first given.

[0063] FIG1 is a schematic diagram of the structure of a common hard disk. Referring to FIG1 , the hard disk 100 includes a spindle motor 110 , multiple magnetic heads (magnetic heads 121 , 122 , and 123 ), multiple platters (platters 131 , 132 , and 133 ), and a printed circuit board (PCB) 141 .

[0064] In hard disk 100, multiple disks are spaced apart along the hard disk's spindle motor 110. The disks are fixed in position within the hard disk's spindle motor 110, 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.

[0065] The hard disk drive 100's core component is the disk. It's a circular disk made of materials like aluminum alloy or glass, coated with a magnetic material. The magnetic head, consisting of a fixed head arm and a magnetic head, reads and writes data from the disk. The spindle motor 110 is the hard disk's power source, rotating the disk via its spindle. The PCB 141 is the hard disk's control center, responsible for controlling read and write operations.

[0066] During data access, PCB 141 in hard disk 100 controls the head that matches the address information in the data access request to access the corresponding disk. PCB 141 also includes a processor, such as a central processing unit (CPU) or other type of processor. In some examples, PCB 141 may also refer to a driver circuit board.

[0067] 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.

[0068] To address the aforementioned issues, an embodiment of the present application provides a possible hard disk, as shown in FIG2 , which is a structural diagram of a hard disk provided by the present application. 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 , multiple platters, a slide 261 , a head arm 262 , and a head 263 .

[0069] 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. The processor 210 is installed with an operating system and other software programs, 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 gate or transistor logic devices, discrete hardware components, etc. In actual applications, the management device 130 may also include multiple processors.

[0070] 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 non-volatile memory, or may include both volatile and non-volatile memories. The non-volatile 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 and 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 DRAM (DDR SDRAM), enhanced synchronous DRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus RAM (DR RAM). Memory 220 can be used to cache data to be written to a disk or to be sent to other devices.

[0071] 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 data stored in the disks.

[0072] The motor 242 may also be referred to as a spindle motor of the hard disk 200 . The motor 242 is used to drive the disks to rotate by rotating the sleeve 250 .

[0073] In Figure 2, multiple discs are mounted on a sleeve 250. As shown in Figure 2, the multiple discs include: a first disc 251 and a second disc 252 that are adjacent to each other. The first disc 251 is slidably connected to the sleeve 250, and the second disc 251 is slidably connected to the sleeve 250. A sliding connection refers to two objects that are in contact but not fixed to each other. When one object is fixed, the other object can slide along the contact surface between the two (sliding left and right, sliding up and down, or sliding 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.

[0074] 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 .

[0075] In this embodiment, the disks in the hard drive are slidably connected to the sleeve, and the disks can be stacked and placed on the sleeve, allowing a larger number of disks to be installed in a single hard drive, thereby increasing the hard drive's storage capacity. Furthermore, during data access, the magnetic head extends between different disks based on the address to be accessed, solving the problem of the magnetic head being unable to access data due to a lack of clearance between stacked disks.

[0076] 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 magnetic head 263 and is slidably connected to the slide bar 261 .

[0077] 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. In addition, 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 when the processor 210 opens the position between the first disk 251 and the second disk 252 mentioned above.

[0078] In order to more accurately control the magnetic head to access the disk corresponding to the address carried in the read / write IO request, a possible implementation method is provided based on Figure 2. The hard disk 200 may also be provided with an auxiliary positioning structure, as shown in Figure 3. Figure 3 is a second structural schematic diagram of a hard disk provided by this application. The difference between Figure 3 and Figure 2 is that Figure 3 adds an auxiliary positioning structure 264. 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.

[0079] Exemplarily, the auxiliary positioning structure 264 can be a laser-based positioning device (a laser positioning device) or other photoelectric detection device that uses photoelectric conversion to achieve positioning. Thus, the processor 210 can determine the disk position corresponding to the address to be accessed based on the laser positioning device, allowing the magnetic head 263 to more accurately access the data stored on the disk and avoid data reading and writing errors.

[0080] It is worth noting that in the hard disk 200 shown in Figures 2 and 3, 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 set in the hard disk 200 to increase the storage capacity of the hard disk 200.

[0081] When multiple discs are stacked in the sleeve 250, the hard disk 200 must not move or shake. To keep the relative positions of the discs fixed and avoid access errors caused by changes in the relative positions of the discs, based on the first disc 251 and the second disc 252 provided in Figures 2 and 3, an embodiment of the present application provides a possible implementation method, as shown in Figure 4A. Figure 4A is a structural diagram of a disc provided by the present application.

[0082] As shown in FIG. 4A , 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.

[0083] The first connecting portion 251B and the second connecting portion 252B are detachably connected.

[0084] The detachable connection of the two connecting parts is exemplified below using Case (1) and Case (2) in FIG. 4A .

[0085] In case (1) of FIG4A , the first connecting portion 251B is a protrusion structure, and the second connecting portion 252B is a groove structure. The protrusion structure of the upper disk (first disk 251) cooperates with the groove structure of the lower disk (second disk 252) to allow the two adjacent disks to engage with each other, achieving a gap-free arrangement between adjacent disks. This helps increase the number of disks that can be installed in the hard disk and improve the storage capacity of the hard disk.

[0086] In case (2) of FIG4A , the first connecting portion 251B is a groove structure, and the second connecting portion 252B is a protrusion structure. The groove structure allows the upper disk (first disk 251) to cooperate with the protrusion structure included in the lower disk (second disk 252), so that the two adjacent disks engage with each other, achieving a gap-free arrangement between adjacent disks. This helps increase the number of disks that can be installed in the hard disk and improves the storage capacity of the hard disk.

[0087] The specific structures of the two connecting portions (groove structure and protrusion structure) shown in Figure 4A are merely examples provided in this embodiment and should not be construed as limiting the present application. In some alternative implementations, the connecting portions may also be other types of connectors, such as two connecting portions forming a mortise and tenon structure, with one disc having a protruding portion (also known as a tenon or tenon head, etc.) and the other disc having a recessed portion (also known as a mortise, tenon, or tenon groove). Furthermore, adjacent discs may also be designed to prevent sliding friction, thereby securing the relative position of multiple discs in a stacked state.

[0088] In one implementation, since each disc contains multiple tracks, in order to improve the read and write bandwidth of a single disc in a hard disk, based on Figures 2 to 4A, this embodiment provides a possible example, as shown in Figure 4B, which is a second structural schematic diagram of a disc provided by this application. The disc shown in Figure 4B can be any of the discs shown in Figures 2 to 4A above. The disc includes: multiple tracks arranged along the radial direction of the disc, such as the first track 1, the second track 2, and the third track 3 in Figure 4B, etc. In the disc, 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.

[0089] 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.

[0090] Taking FIG4B as an 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 on the disk, and the second head 2632 is used to access the second track 2 on the disk. Alternatively, the first head 2631 is used to access the second track 2 on the disk, and the second head 2632 is used to access the third track 3 on the disk.

[0091] It is worth noting that the distance between the two heads in FIG4B matches the gap between two adjacent tracks. However, in some possible scenarios, the distance between the two heads can be larger, allowing the two heads to simultaneously access two non-adjacent tracks on the disk. In some optional implementations, the head arm can be provided with a larger number of heads, such as n, 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. All implementations that increase the read and write bandwidth of the hard disk by changing the number of heads are included in the scope of protection of this application.

[0092] 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.

[0093] 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 accessing data will the magnetic head 263 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 must also be left between adjacent disks. The width of this 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 to avoid direct contact between the magnetic head 263 and the disks that do not need to be accessed, which may cause damage to the disks.

[0094] Based on this, this embodiment provides a possible implementation method, such as the above-mentioned hard disk 200 also includes a separation component, which is arranged on the inner side of the sleeve 250 and is used to separate the first disc 251 and the second disc 252, or stack the first disc 251 and the second disc 252.

[0095] Regarding the hardware implementation of the separation component, two possible implementation methods are provided below: 1. Separation and stacking of the discs based on aerodynamics; 2. Separation (opening) and stacking of the discs based on mechanical structure.

[0096] In a first possible implementation, the separation and stacking of the discs are achieved based on aerodynamics.

[0097] Based on the hard disk 200 shown in Figures 2 and 3, a possible embodiment is provided below, as shown in Figure 5A, which is a structural schematic diagram of a magnetic head assembly provided by this application. The magnetic head assembly includes: the sleeve 250 shown in Figure 2, the first disk 251 and the second disk 252, as well as the first hole structure 271 and the inflation structure 273.

[0098] The magnetic head assembly may also include other disks (not shown in FIG5A ) mounted on the sleeve 250 . FIG5A only exemplarily illustrates the implementation of the separation assembly using the first disk 251 and the second disk 252 .

[0099] The first hole structure 271 extends through the inner and outer walls of the sleeve 250. Exemplarily, the first hole structure 271 includes a plurality of through-holes, which are spaced apart along the circumference of the sleeve 250. Since each disk is sleeved on the sleeve 250, multiple through-holes (e.g., 2, 3, 4, 5, 6, or another number) are provided circumferentially around the sleeve. When air or other gas is passed through these through-holes, the disks corresponding to the locations of these through-holes open, allowing the magnetic head to extend into the gap between the first and second disks to access data stored on the first or second disks. Furthermore, the multiple through-holes can simultaneously drain gas, allowing the upper disk (e.g., the first disk) and the lower disk (e.g., the second disk) to open smoothly as a whole. This avoids the problem of one side of the upper disk being open while the other side remains in contact with the lower disk, thereby improving the service life of each disk in the hard disk.

[0100] When the first disk 251 and the second disk 252 are separated, their axial projections on the sleeve 250 are located on either side of the first hole structure. During data access, the hole structure can be used to allow air or other gas to pass through, opening the gap between the adjacent disks (changing from a stacked state to a separated state), thereby allowing the magnetic head to extend into the gap between the first and second disks to access data stored on the first or second disk.

[0101] 5A , the aforementioned separation assembly includes an inflatable structure 273 . The inflatable structure 273 is provided with a gas delivery port, which is detachably connected to the first hole structure 271 .

[0102] The following exemplary description is based on FIG5A and is combined with FIG5B , which is a cross-sectional view of a magnetic head assembly provided by this application. The inflatable structure 273 includes an air inlet 273A and multiple air ducts, each of which has one end connected to the air inlet 273A and the other end having an air outlet. For example, air duct 1 has air outlet 1, and air duct 2 has air outlet 2.

[0103] 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.

[0104] Exemplarily, if the gas delivery port of the inflatable structure 273 and the first hole structure are in a connected state, such as the gas outlet 1 in Figure 5B is aligned with the through hole (white circle) on the left side of the first hole structure in Figure 5A, and the gas outlet 2 is aligned with the through hole (white circle) on the right side of the first hole structure, then the gas delivery port is connected to the first hole structure 271, and the air or other gas discharged from the first hole structure 271 causes the first disc 251 and the second disc 252 to be in a separated state (or open state).

[0105] As another example, if the gas delivery port and the first hole structure of the inflatable structure 273 are in an unconnected state, such as the gas outlet 1 in FIG5B is not aligned with the through hole (white circle) on the left side of the first hole structure in FIG5A , and the gas outlet 2 is not aligned with the through hole (white circle) on the right side of the first hole structure, then the gas 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.

[0106] During actual use, the inflatable structure may further include an airway control assembly that can control the air outlet of the airway to slide up and down along the extension direction of the sleeve, so that the air outlet aligns with different hole structures on the sleeve. Figures 5A and 5B above are merely examples provided for this embodiment. The number of airway 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, and this application is not limited to this.

[0107] In an optional embodiment, the inflatable structure 273 is rotatably connected to the sleeve 250. For example, the inflatable structure 273 can rotate within the sleeve to connect or disconnect the gas delivery port and the hole structure within the sleeve, thereby controlling the position of the discs to be opened among the multiple discs mounted on the sleeve.

[0108] Regarding the aforementioned hole structure, based on FIG5A , this application further provides a possible example, as shown in FIG6 , which is a second structural schematic diagram of a magnetic head assembly provided by this application. The difference between FIG6 and FIG5A is that the sleeve 250 is further provided with a second hole structure 272 , which penetrates the inner and outer walls of the sleeve 250 . The aforementioned plurality of discs further includes 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 .

[0109] 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.

[0110] For example, 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 discharged 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).

[0111] As another example, if the gas supply port of the inflatable structure 273 and the second hole structure 272 are in an unconnected state, the gas supply port and the second hole structure 272 are not connected, and the hole structure cannot conduct air or other gases, causing adjacent discs (such as the second disc 252 and the third disc 253) to be in a stacked state.

[0112] As shown in Figure 6, 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.

[0113] In FIG6 , the inflatable structure 273 is rotatably connected to the sleeve 250. Exemplarily, the inflatable structure 273 can rotate within the sleeve to connect or disconnect the gas delivery port and the hole structure within the sleeve, so that the disconnected hole structure does not discharge air or other gases, while the connected hole structure discharges air, thereby controlling the position of the multiple discs mounted on the sleeve to be opened.

[0114] It is worth noting that in some possible embodiments, the circumferential projections of the various hole structures on the sleeve 250 do not overlap. Therefore, during the rotation of the inflatable structure 273 on the inner side of the sleeve 250, the air outlet 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.

[0115] The relative positions of the hole structures in the circumferential direction of the sleeve 250 are determined according to the number of stacked discs.

[0116] Illustratively, the central angle α formed between the circumferential projections of the adjacent hole structures on the sleeve 250 and the central axis of the inflatable structure 273 is 360° / N, where N is the number of disks stacked on a single sleeve in the hard disk.

[0117] For example, if there are 90 disks stacked in a hard drive, the angle between the projections 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, every 4° the inflatable structure rotates, the air is directed toward the hole structure on one layer and then released, maintaining the air on the upper disk.

[0118] For example, if there are 60 disks stacked in a hard drive, the angle between the circumferential projections of two adjacent hole structures on the sleeve 250 and the central axis of the inflatable structure 273 is 6°. That is, every 6° of rotation of the inflatable structure, the air is directed toward the hole structure of one layer and released, maintaining the air on the upper disk.

[0119] For example, if there are 45 disks stacked in a hard drive, the angle between the circumferential projections of two adjacent hole structures on the sleeve 250 and the central axis of the air-filled structure 273 is 8°. That is, every 8° of rotation of the air-filled structure, the air is directed toward the hole structure on one layer and then released, maintaining the air on the upper disk.

[0120] 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 example 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.

[0121] 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 greater 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.

[0122] In other possible embodiments, the circumferential projections of the various hole structures on 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 outlet 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.

[0123] Regarding the hardware implementation of the separated components, a second possible implementation is provided below.

[0124] In a second possible implementation, the separation (opening) and stacking of the discs are achieved based on a mechanical structure.

[0125] Based on the hard disk 200 shown in Figures 2 and 3, a possible embodiment is provided below, as shown in Figure 7, which is a third structural schematic diagram of a magnetic head assembly provided by this application. The magnetic head assembly includes: the sleeve 250 shown in Figure 2, the first disk 251 and the second disk 252, as well as the first assembly portion 281 and the support member 283.

[0126] The magnetic head assembly may also include other disks (not shown in FIG. 7 ) mounted on the sleeve 250 . FIG. 5A only exemplifies the implementation of the separation assembly using the first disk 251 and the second disk 252 .

[0127] Referring to 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 a gap is formed between the first disc 251 and the second disc 252.

[0128] For example, 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.

[0129] Accordingly, the first assembly portion 281 includes a plurality of slots, which are spaced apart along the circumference of the sleeve 250. In Figure 7, each slot corresponds to a white square figure.

[0130] Regarding the process of the support member 283 and the first assembly portion 281 cooperating to open the disk, this embodiment provides a possible example, as shown in Figure 8, which is a cross-sectional view of the first assembly portion and the support member in the head assembly of Figure 7. The support member 283 includes: a plurality of latches, such as latches 1 to 4, arranged at intervals along the axial direction of the sleeve 250; the first assembly portion 281 includes: a plurality of slots arranged at intervals along the circumference of the sleeve 250.

[0131] The plurality of latches and the plurality of sockets are detachably connected in a one-to-one correspondence. For example, latch 1 corresponds to socket 1, latch 2 corresponds to socket 2, latch 3 corresponds to socket 3, and latch 4 corresponds to socket 4. When the latches and sockets are mated and connected, the plurality of latches can be used to support a disc to be opened.

[0132] For example, each latch can be shaped like a prism, a wedge (as shown in FIG8 ), or another curved structure to reduce wear on the discs caused by the latch extending from the assembly portion into or retracting into the sleeve, thereby increasing the disc's service life. Each latch corresponds to a slot arranged along the circumference of sleeve 250 , so that when a latch is inserted into a slot, the multiple latches support the discs, creating a gap between adjacent discs.

[0133] 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 data stored in the opened disks.

[0134] It is worth noting that FIG8 illustrates an example of a support member including four latches. However, in some possible examples, the support member may include more or fewer latches, such as two latches, three latches, five latches, or other numbers, and this application is not limited thereto. In this embodiment, the extension and retraction of each latch can be achieved by the drive member 241, motor 242, or other drive device in FIG2 , which will not be described in detail here.

[0135] The key point of this embodiment is the introduction of a latch design for dynamically separating the discs, so that the storage capacity on the discs can be dynamically and temporarily displayed for the magnetic head to read and write, thereby increasing the number of discs in the hard disk and expanding the storage capacity of the hard disk.

[0136] It should be understood that in order to open different discs in the magnetic head assembly, other assembly parts can be provided on the sleeve. Based on Figure 7, a possible example is provided below, as shown in Figure 9, which is a structural schematic diagram of a magnetic head assembly provided by this application. The difference between Figure 9 and Figure 7 is that the sleeve 250 is further provided with a second assembly part 282, and the second assembly part 282 also includes a plurality of slots arranged along the circumference of the sleeve 250. The aforementioned multiple discs also include: a fourth disc 254, which is located on the side of the first disc 251 away from the second disc 252 and is slidably connected to the sleeve 250.

[0137] 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 a gap exists between the first disc 251 and the fourth disc 254 .

[0138] In this example, different assembly parts correspond to the 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 the data stored in the opened disks.

[0139] In this example, the thickness of hard disk 200 is 12.5mm-26mm. For a 2.5-inch hard disk enclosure, the thickness of hard disk 200 can be set to 12.5mm, and multiple disks can be stacked in the hard disk to increase the number of disks and storage capacity that the 2.5-inch hard disk enclosure can accommodate. For a 3.5-inch hard disk enclosure, the thickness of hard disk 200 can be set to 26mm, and multiple disks can be stacked in the hard disk to increase the number of disks and storage capacity that the 3.5-inch hard disk enclosure 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.

[0140] It should be understood that the storage components provided in the embodiments of the present application may exist independently or may be set in a hard disk, and the present application does not limit this.

[0141] Based on the hard disks provided in the above embodiments, an embodiment of the present application further provides a hard disk management method, which is applicable to the hard disks provided in any of the above embodiments, as shown in FIG10 , which is a flow chart of a hard disk management method provided in the present application. The hard disk management method includes the following steps S101 to S103.

[0142] S101 : The processor 210 receives a data access request.

[0143] The data access request carries the address to be accessed.

[0144] 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.

[0145] 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.

[0146] 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.

[0147] In this embodiment, the disks in the hard drive are slidably connected to the sleeve, and the disks can be stacked and placed on the sleeve, allowing a larger number of disks to be installed in a single hard drive, thereby increasing the hard drive's storage capacity. Furthermore, during data access, the processor controls the magnetic head to extend between different disks based on the address to be accessed, thus resolving the problem of the magnetic head being unable to access data due to a lack of clearance between stacked disks.

[0148] 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 disc and the second disc, so that there is a gap between the first disc and the second disc; the processor 210 controls the head arm to slide along the extension direction of the slide rod, so that the head is aligned with the gap.

[0149] It should be understood that Figure 2 only shows one set of slide rod + head arm + head, but the hard disk may also be provided with more sets of access components (such as 2 sets, 3 sets, 4 sets or other numbers, etc.), each set of access components may include a head arm and a head, and these multiple sets of access components may be set on one slide rod, and these multiple sets of access components may be set on different slide rods respectively.

[0150] More details about the hard disk management method and its beneficial effects can be found in the descriptions of FIG. 2 to FIG. 9 , which will not be elaborated here.

[0151] In order to further illustrate the beneficial effects of the embodiments of the present application, FIG11 provides a possible comparison example. FIG11 is a comparison diagram of a hard disk provided in the present application.

[0152] Case (1) in FIG11 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 set in a 3.5-inch hard disk frame, and the storage capacity of the hard disk is relatively small.

[0153] Case (2) of Figure 11 corresponds to the structure of the hard disk in this 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.

[0154] Case (3) of Figure 11 corresponds to the structure of the hard disk in this 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.

[0155] In case (2) and case (3) of FIG11 , 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.

[0156] The present application also provides a storage system. The storage system includes the hard disk provided in 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 based on data access requests. The storage system may be, for example, a centralized storage system or a distributed storage system, or a computer / server that uses a hard disk as a persistent storage medium.

[0157] 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, which enable the processor to 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 gate or transistor logic devices, discrete hardware components, etc. In actual applications, the storage system can also include multiple controllers.

[0158] 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 can 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. A storage medium with a power-saving function is called a non-volatile memory.

[0159] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Various equivalent modifications or replacements are contemplated within the technical scope disclosed in this application, and such modifications or replacements should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection 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 comprises 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 sliding rod, wherein the extending direction of the sliding 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 being slidably connected to the sleeve, and the second disc being 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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