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

A hard disk, a hard disk management method, and a storage system

[0001] This application claims priority to Chinese Patent Application No. 202311191333.2, filed on September 14, 2023, entitled "A Hard Disk, a Hard Disk Management Method and a Storage System", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This 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 Technology

[0003] With the advancement of storage media technology, hard drive storage capacity has increased dramatically. A single hard drive can hold one or more platters for data storage; these platters are also called disks. Hard drives also include components such as a spindle motor, multiple read / write heads, and a drive circuit board. In a hard drive, multiple platters are spaced apart along the spindle motor, and each platter is equipped with one read / write head. During data access, the hard drive uses the address information carried in the data access request to control the read / write head that matches that address to access the corresponding platter. Because space needs to be reserved between adjacent platters for the read / write heads, and the position of the platters on the spindle motor is fixed, the number of platters that can be stored in a single hard drive is limited. Consequently, the storage capacity of a hard drive cannot meet the ever-increasing demand for data storage.

[0004] Summary of the Invention

[0005] This application provides a hard disk, a hard disk management method, and a storage system, which solves the problem that the number of platters that can be stored in a single hard disk is limited due to the fixed position of the spindle motor in the hard disk, thereby increasing the storage capacity that a single hard disk can provide.

[0006] In a first aspect, this application provides a hard disk. The hard disk includes a sleeve, multiple platters, and a read / write head. The multiple platters are all mounted on the sleeve, including adjacent first and second platters; the first platter is slidably connected to the sleeve, and the second platter is slidably connected to the sleeve. The read / write head is used to extend between the first and second platters to access either the first or second platter.

[0007] In this application, the platters in the hard disk are slidably connected to the sleeve, and the platters can be stacked on the sleeve, allowing a larger number of platters to be placed in a single hard disk, thereby increasing the storage capacity of the hard disk. Moreover, during data access, the read / write head extends between different platters according to the address to be accessed, solving the problem that the read / write head cannot access data due to the lack of gaps between stacked platters.

[0008] In one alternative implementation, the hard disk provided in this application further includes: a separation component disposed inside the sleeve for separating the first platter and the second platter, or stacking the first platter and the second platter.

[0009] For example, if the separation component separates the first and second platters, the read / write head can be inserted into the gap between the first and second platters to access the data stored on the first or second platters.

[0010] For example, if the separation component places the first and second platters in a stacked state, more platters can be placed inside the hard drive, which helps to increase the storage capacity of the hard drive.

[0011] In one alternative implementation, the sleeve has a first hole structure that penetrates both the inner and outer walls of the sleeve. If the first and second platters are in a separated state, their axial projections on the sleeve are located on opposite sides of the first hole structure. In this application, the sleeve has a hole structure that, during data access, can be used to allow air or other gases to pass through, opening the gap between adjacent platters (changing from a stacked state to a separated state). This allows the read / write head to extend into the gap between the first and second platters to access the data stored on either the first or second platter.

[0012] In one alternative implementation, the separation component includes: an inflation structure with an air inlet, the air inlet and a first hole structure being detachably connected. If the air inlet and the first hole structure are connected, they communicate with each other. Furthermore, if the air inlet and the hole structure are not connected, they are not communicating, and the hole structure cannot conduct air or other gases, allowing adjacent discs to be stacked.

[0013] In one alternative implementation, the inflation structure is rotatably connected to the sleeve. For example, the inflation structure can rotate within the sleeve to either connect or disconnect the air inlet and the perforated structure within the sleeve, thereby controlling the position of the multiple discs mounted on the sleeve to be opened.

[0014] In one alternative implementation, the first hole structure includes multiple through holes spaced apart circumferentially along the sleeve. Since each platter is fitted onto the sleeve, the multiple through holes circumferentially allow air or other gases to pass through them. This causes the platter corresponding to the position of the through holes to open, allowing the read / write head to extend into the gap between the first and second platters to access the data stored on either the first or second platter.

[0015] In one alternative implementation, the sleeve further includes a second hole structure that penetrates both the inner and outer walls of the sleeve. The multiple platters also include a third platter located on the side of the second platter away from the first platter and slidably connected to the sleeve. If the second and third platters are in a separated state, the projections of the third and second platters along the sleeve's axial direction are located on opposite sides of the second hole structure. In this application, the sleeve has a hole structure that, during data access, can be used to allow air or other gases to pass through, opening the gap between adjacent platters (changing from a stacked state to a separated state), thereby allowing the read / write head to extend into the gap between the second and third platters to access the data stored on either the second or third platter.

[0016] In one alternative implementation, the projections of the first and second hole structures onto the circumferential direction of the sleeve do not overlap. Different hole structures are arranged circumferentially on the sleeve, allowing the air inlet of the inflation structure to communicate with different hole structures during rotation, thereby opening discs at different positions on the sleeve.

[0017] In one alternative implementation, the sleeve has a first mounting portion. The separation assembly includes a support member detachably connected to the first mounting portion for supporting a first or second disc, creating a gap between the first and second discs. In this application, multiple discs stacked on the sleeve are opened using the mounting portion and the support member, allowing the read / write head to reach between adjacent discs to access data stored on the opened discs.

[0018] In one alternative implementation, the sleeve further includes a second mounting portion. The hard disk also includes a fourth platter located on the side of the first platter away from the second platter and slidably connected to the sleeve. The support member is detachably connected to the second mounting portion and also supports either the first or fourth platter, creating a gap between the first and fourth platters. Different mounting portions correspond to different gaps between platters to be opened, allowing the support member to open different platters when connected to different mounting portions, enabling the read / write head to reach between adjacent platters to access data stored on the opened platters.

[0019] In one alternative implementation, the first assembly includes a plurality of slots spaced circumferentially along the sleeve. The support includes a plurality of pins spaced circumferentially along the sleeve, one of which is detachably connected to one of the slots. Exemplarily, each pin and slot corresponds one-to-one, such that when a pin is inserted into a slot, the pins can be used to support a disc, creating a gap between adjacent discs.

[0020] In one alternative implementation, the first platter includes a first platter body and a first connecting portion connected to each other; the second platter includes a second platter 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 platter, when the connecting portions of adjacent platters cooperate with each other, the relative position between two adjacent platters is fixed, preventing misalignment between stacked platters and improving the reliability of the hard drive.

[0021] In one alternative implementation, the first connecting part is a groove structure, and the second connecting part is a protrusion structure. Alternatively, the second connecting part is a groove structure, and the first connecting part is a protrusion structure.

[0022] In one alternative implementation, the hard disk of this application further includes a slide bar and a head arm. The extension direction of the slide bar is parallel to the axis of the sleeve; the head arm is fixedly connected to the head and slidably connected to the slide bar. In this application, by using a head arm that can slide on the slide bar, the head can access platters at different heights on the sleeve, effectively managing the data stored on each platter in the hard disk.

[0023] In one optional implementation, the hard disk of this application further includes a second read / write head, arranged side-by-side with the first read / write head along the extending direction of the aforementioned head arm. When the first and second read / write heads access one of a plurality of platters, the first read / write head accesses a first track on the platter, and the second read / write head accesses a second track on the platter. Thus, when the head arm extends into one of two adjacent platters, different read / write heads can be used to access different tracks on that platter, allowing the multiple read / write heads fixed on the head arm to access more data on the platter per unit time, which helps to improve the read / write bandwidth of the hard disk and thereby enhances the data access performance of the hard disk.

[0024] In one alternative implementation, the hard disk of this application further includes an auxiliary positioning structure, the extension direction of which is parallel to the axis of the sleeve, for guiding the read / write head to align with the platter to be inserted.

[0025] In one alternative implementation, the hard drive thickness is 12.5mm-26mm.

[0026] Secondly, this application provides a storage system. The storage system includes: one or more hard disks provided in any of the optional methods described in the first aspect, and a processor. The processor is configured to access the aforementioned hard disks according to a data access request.

[0027] Thirdly, this application provides a storage component. The storage component includes a sleeve, a first platter, and a second platter. The sleeve has a first hole structure that penetrates the inner and outer walls of the sleeve. The first platter is sleeved on the sleeve and slidably connected to it; the second platter is sleeved on the sleeve and slidably connected to it. The projections of the first and second platter along the axial direction of the sleeve are located on opposite sides of the first hole structure. The platters can be stacked on the sleeve, allowing for a larger number of platters to be mounted on the sleeve, which is beneficial for increasing the storage capacity of the storage component. Furthermore, the hole structure on the sleeve allows air or other gases to be channeled during data access, opening the gap between adjacent platters (changing from a stacked state to a separated state), thereby allowing the read / write head to extend into the gap between the first and second platters to access the data stored on either the first or second platter.

[0028] Optionally, the first hole structure includes multiple through holes, which are spaced apart circumferentially along the sleeve.

[0029] Optionally, the sleeve also includes a second hole structure that penetrates both the inner and outer walls of the sleeve. The storage assembly further includes a third platter located on the side of the second platter away from the first platter and slidably connected to the sleeve. The projections of the third platter and the second platter along the axial direction of the sleeve are located on opposite sides of the second hole structure.

[0030] Optionally, the 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, wherein the first connecting portion and the second connecting portion are detachably connected.

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

[0033] Optionally, the storage component further includes: an inflation structure with an air inlet, the air inlet and the first hole structure being detachably connected. If the air inlet and the first hole structure are in a connected state, the air inlet and the first hole structure are in communication.

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

[0035] Fourthly, this application provides another storage component. The storage component includes a sleeve, a first platter, a second platter, and a support member. The sleeve has a first mounting portion. The first platter is fitted onto the sleeve and slidably connected to it; the second platter is fitted onto the sleeve and slidably connected to it. The support member is detachably connected to the first mounting portion and is used to support the first platter or the second platter, creating a gap between the first platter and the second platter. The platters can be stacked on the sleeve, allowing for a larger number of platters to be mounted on the sleeve, which improves the storage capacity of the storage component. Furthermore, the mounting portion and the support member allow the stacked platters on the sleeve to be opened, enabling the read / write head to access data stored on the opened platters by inserting between adjacent platters.

[0036] Optionally, the sleeve also includes a second mounting portion. The storage assembly further includes a third platter located on the side of the second platter away from the first platter and slidably connected to the sleeve. The support member is detachably connected to the second mounting portion and also supports the second or third platter, creating a gap between the second and third platters.

[0037] Optionally, the first assembly includes a plurality of slots spaced circumferentially along the sleeve. The support includes a plurality of pins spaced circumferentially along the sleeve, one of which is detachably connected to one of the 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, wherein the first connecting portion and the second connecting portion are detachably connected.

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

[0040] Fifthly, this application provides a hard disk drive. The hard disk drive includes: a processor, and a storage component provided in either the third or fourth aspect. The processor is used to control components within the storage component according to an access request to access data stored on the disk.

[0041] Sixthly, this application provides a hard disk management method. This method is applied to a hard disk, which includes: a sleeve, multiple platters, a read / write head, and a controller; the multiple platters are all mounted on the sleeve, including: adjacent first platters and second platters, the first platter being slidably connected to the sleeve, and the second platter being slidably connected to the sleeve. The hard disk management method provided in this application includes: the controller receiving a data access request, the data access request carrying an address to be accessed; and the controller determining the first platter and the second platter to be opened based on the address carried in the data access request; then, the controller controlling the read / write head to extend between the first platter and the second platter to access the first platter or the second platter. In this application, the platters in the hard disk are slidably connected to the sleeve, and the platters can be stacked on the sleeve, allowing a larger number of platters to be installed in a single hard disk, thereby increasing the storage capacity of the hard disk. Moreover, during data access, the processor controls the read / write head to extend between different platters according to the address to be accessed, solving the problem that the read / write head cannot access data due to the lack of gaps between stacked platters.

[0042] In one alternative implementation, the hard drive further includes: a separation assembly, a slide bar, and a head arm. The separation assembly is disposed inside the sleeve, the slide bar extends parallel to the axis of the sleeve, and the head arm is fixedly connected to the head and slidably connected to the slide bar. The aforementioned controller controls the head to extend between the first and second platters, including: the controller controlling the separation assembly to open the first and second platters, creating a gap between them; and the controller controlling the head arm to slide along the extension direction of the slide bar, aligning the head with the gap.

[0043] The beneficial effects of aspects two through six above can be referred to the description of any optional method in aspect one, and will not be repeated here. Based on the implementation methods provided in the above aspects, this application can be further combined to provide more implementation methods. Attached Figure Description

[0044] Figure 1 is a schematic diagram of a general hard disk structure;

[0045] Figure 2 is a schematic diagram of the structure of a hard disk provided in this application;

[0046] Figure 3 is a schematic diagram of the structure of a hard disk provided in this application;

[0047] Figure 4A is a schematic diagram of the structure of a disc provided in this application;

[0048] Figure 4B is a schematic diagram of the structure of a disc provided in this application;

[0049] Figure 5A is a schematic diagram of a magnetic head assembly provided in this application;

[0050] Figure 5B is a cross-sectional view of a magnetic head assembly provided in this application;

[0051] Figure 6 is a schematic diagram of a magnetic head assembly provided in this application.

[0052] Figure 7 is a schematic diagram of the structure of a magnetic head assembly provided in this application;

[0053] Figure 8 is a cross-sectional view of the first assembly and the support in the head assembly of Figure 7;

[0054] Figure 9 is a schematic diagram of the structure of a magnetic head assembly provided in this application;

[0055] Figure 10 is a flowchart illustrating a hard disk management method provided in this application;

[0056] Figure 11 is a comparison diagram of a hard disk provided in this application. Detailed Implementation

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

[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 to storage systems that include hard disk devices. The terminology used in the implementation section of this application is only for explaining specific embodiments of this application and is not intended to limit this application. A brief introduction to some concepts that may be involved in this application is given below.

[0059] Magnetic head: A component that reads and writes data on magnetic tape using magnetic principles. It is divided into write heads and read heads. Write heads record data by magnetizing the magnetic medium (such as magnetic powder), while read heads read data from the magnetic medium by sensing its magnetic field.

[0060] Disc: Also known as a platter, it is a round disc made of materials such as aluminum alloy or glass, coated with magnetic material, used to store data.

[0061] Spindle motor: This is the power source for the hard drive. The spindle motor drives the disk to rotate through the spindle.

[0062] To ensure clarity and brevity in the description of the following embodiments, a brief introduction to the relevant technologies is given first.

[0063] Figure 1 is a schematic diagram of a general hard disk structure. Referring to Figure 1, the hard disk 100 includes: a spindle motor 110, multiple read / write heads (head 121, head 122 and head 123), multiple platters (platter 131, platter 132 and platter 133) and a printed circuit board (PCB) 141.

[0064] In the hard disk 100, multiple platters are spaced apart along the spindle motor 110. The position of the platters in the spindle motor 110 is fixed, and each platter is equipped with a read / write head. For example, head 121 is used to access platter 131, head 122 is used to access platter 132, and head 123 is used to access platter 133.

[0065] The platter is the core component of the hard disk 100. It is a circular platter made of materials such as aluminum alloy or glass, coated with a magnetic material. The read / write head is the device for reading and writing data on the platter. The read / write head includes a fixed head arm and a head. The spindle motor 110 is the power source of the hard disk, driving the platter to rotate via the spindle. The PCB 141 is the control center of the hard disk 100, responsible for controlling the read and write operations of the hard disk 100.

[0066] During data access, the PCB 141 in the hard disk 100 controls the read / write head that matches the address information carried in the data access request to access the corresponding platter. 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 drive circuit board.

[0067] Because space needs to be reserved between adjacent platters for the read / write heads, and the position of the platters in the spindle motor 110 of the hard drive is fixed, the number of platters that can be stored in a single hard drive is limited. Consequently, the storage capacity of the hard drive cannot meet the ever-increasing demand for data storage.

[0068] To address the aforementioned problems, embodiments of this application provide a possible hard disk, as shown in Figure 2, which is a schematic diagram of the structure of a hard disk provided in this application. The hard disk 200 includes: a processor 210, a memory 220, an input / output (I / O) card 230, a driver 241, a motor 242, a sleeve 250, multiple platters, a slide bar 261, a head arm 262, and a head 263.

[0069] Processor 210 is the processing and control core of hard disk 200. Processor 210 can be a very large-scale integrated circuit. An operating system and other software programs are installed in processor 210, enabling it to access memory and various PCIe devices. Processor 210 includes one or more processor cores. These cores can be, for example, CPUs or other application-specific integrated circuits (ASICs). Processor 210 can also be other general-purpose processors, digital signal processors (DSPs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. In practical applications, management device 130 may also include multiple processors.

[0070] The memory 220 can be a storage medium used to store execution information and other information. The memory 220 can be volatile memory or non-volatile memory, or a combination of both. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be 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 random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked 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.

[0071] The IO card 230 is used to receive control requests from the processor 210 and control the position of the head arm 262 on the slide bar 261 according to the control requests, so that the head can extend between the disks to access the data stored in the disks.

[0072] Motor 242, also known as the spindle motor of hard disk 200, is used to drive each disk to rotate by rotating sleeve 250.

[0073] In Figure 2, multiple discs are mounted on the sleeve 250. As shown in Figure 2, these multiple discs include: an adjacent first disc 251 and a second disc 252. The first disc 251 and the second disc 251 are slidably connected to the sleeve 250. Here, "sliding connection" means that two objects are in contact but not fixed to each other; when one object is fixed, the other object can slide along the contact surface (left-right, up-down, or in other directions). In this embodiment, the first disc 251 can slide up-down along the axial direction of the sleeve 250, and the second disc 252 can also slide up-down along the axial direction of the sleeve 250.

[0074] The read / write 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 platters in the hard drive are slidably connected to the sleeve, and the platters can be stacked on the sleeve, allowing for a larger number of platters to be placed in a single hard drive, thereby increasing the storage capacity of the hard drive. Moreover, during data access, the read / write head extends between different platters according to the address to be accessed, solving the problem of the read / write head being unable to access data due to the lack of gaps between stacked platters.

[0076] Please refer to Figure 2. The extension direction of the slide bar 261 is parallel to the axis of the sleeve 250. The magnetic head arm 262 is fixedly connected to the magnetic head 263 and slidably connected to the slide bar 261.

[0077] When the hard disk 200 receives a read / write I / O request, the processor 210 controls the drive 241 to drive the head arm 262 to slide along the slide bar 261 to the disk position corresponding to the address carried in the read / write I / O request. The processor 210 is also used to open the disk corresponding to the aforementioned address so that the head 263 can be inserted into the disk to be accessed, such as the processor 210 opening the position between the first disk 251 and the second disk 252.

[0078] To more accurately control the access of the read / write I / O request to the disk corresponding to the address carried in the read / write I / O request, based on Figure 2, a possible implementation method is provided. The hard disk 200 can also be equipped with an auxiliary positioning structure, as shown in Figure 3. Figure 3 is a schematic diagram of the structure of a hard disk provided in this application. The difference between Figure 3 and Figure 2 is that an auxiliary positioning structure 264 is added in Figure 3. The extension direction of this auxiliary positioning structure 264 is parallel to the axis of the sleeve 250, and it is used to guide the read / write head 263 to align with the disk to be inserted.

[0079] For example, the auxiliary positioning structure 264 can be a laser-based positioning device (laser positioning device) or other photoelectric detection devices that use 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, enabling the read / write head 263 to access the data stored on the disk more accurately and avoiding data read / write errors.

[0080] It is worth noting that in the hard disk 200 shown in Figures 2 and 3, apart from the first platter 251 and the second platter 252 being opened during data access, the other platters are stacked on top of each other. Therefore, the hard disk 200 can have a larger number of platters, thereby increasing the storage capacity of the hard disk 200.

[0081] When multiple platters are stacked in the sleeve 250, the hard drive 200 may inevitably move or shake. To keep the relative positions of the platters fixed and avoid access errors caused by changes in the relative positions of the platters, based on the first platter 251 and the second platter 252 provided in Figures 2 and 3, the embodiments of this application provide a possible implementation method, as shown in Figure 4A, which is a schematic diagram of the structure of a platter provided in this application.

[0082] As shown in Figure 4A, the first disc 251 includes a first disc body 251A and a first connecting part 251B connected to each other; the second disc 252 includes a second disc body 252A and a second connecting part 252B connected to each other.

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

[0084] The detachable connection of the two connecting parts will be illustrated below using cases (1) and (2) in Figure 4A as examples.

[0085] In case (1) of Figure 4A, the first connecting part 251B is a protruding structure, and the second connecting part 252B is a groove structure. The upper disk (first disk 251) cooperates with the groove structure of the lower disk (second disk 252) through the protruding structure, so that the two adjacent disks are interlocked, realizing the gapless arrangement between adjacent disks, which is beneficial to increasing the number of disks that can be set in the hard disk and improving the storage capacity of the hard disk.

[0086] In case (2) of Figure 4A, the first connecting part 251B is a groove structure, and the second connecting part 252B is a protrusion structure. The upper disk (first disk 251) cooperates with the protrusion structure of the lower disk (second disk 252) through the groove structure, so that the two adjacent disks are interlocked, realizing the gapless arrangement between adjacent disks, which is beneficial to increasing the number of disks that can be set in the hard disk and improving the storage capacity of the hard disk.

[0087] The specific structures of the two connecting parts shown in Figure 4A (groove structure, protrusion structure) are merely examples provided in this embodiment and should not be construed as limiting this application. In some optional implementations, the connecting parts described above can also be other types of connectors, such as two connecting parts forming a mortise and tenon structure, where one disc has a protruding part (or tenon or tenon head, etc.) and the other disc has a recessed part (or mortise, tenon eye, or mortise groove). In addition, adjacent discs can also be designed to prevent sliding friction, so as to achieve the function of fixing the relative position of multiple discs in a stacked state.

[0088] In one implementation, since each platter contains multiple tracks, to improve the read / write bandwidth of a single platter in the hard drive, based on Figures 2 to 4A, this embodiment provides a possible example, as shown in Figure 4B. Figure 4B is a schematic diagram of the structure of a platter provided in this application. The platter shown in Figure 4B can be any of the platters shown in Figures 2 to 4A. The platter includes multiple tracks arranged radially along the platter, such as track 1, track 2, and track 3 in Figure 4B. In the platter, 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 each sector can store is the same (e.g., the capacity of each sector is 128 × 22 = 512 bytes), so the innermost sector has the highest data density.

[0089] Optionally, multiple 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 Figure 4B as an example, when the first magnetic head 2631 and the second magnetic head 2632 access a single disc, the first magnetic head 2631 is used to access the first track 1 of the disc, and the second magnetic head 2632 is used to access the second track 2 of the disc. Alternatively, the first magnetic head 2631 is used to access the second track 2 of the disc, and the second magnetic head 2632 is used to access the third track 3 of the disc.

[0091] It is worth noting that the distance between the two heads in Figure 4B matches the gap between two adjacent tracks. However, in some possible cases, the distance between the two heads can be larger, allowing them to simultaneously access two non-adjacent tracks on the disk. In some optional implementations, the head arm can be equipped with a greater 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 on the head arm, and all implementations that improve the read / write bandwidth of the hard drive by changing the number of heads are included within the scope of protection of this application.

[0092] In this way, when the read / write head arm extends into one of two adjacent platters, different heads can be used to access different tracks on that platter. This allows multiple heads fixed on the read / write head arm to access more data on the platter per unit time, which helps to improve the read / write bandwidth of the hard drive and thus enhances the data access performance of the hard drive.

[0093] When the hard drive 200 is in standby mode, the aforementioned read / write head 263 can be positioned above the topmost platter among multiple platters. The head 263 will only extend between the platters to be accessed during data access. It should be understood that during data access, in addition to the head 263 needing to extend between the platters, a certain gap must also be maintained between adjacent platters. The width of this gap along the axial direction of the sleeve 250 should be greater than the height of the head along the axial direction of the sleeve 250 to prevent direct contact between the head 263 and platters that are not being accessed, which could damage the platters.

[0094] Based on this, this embodiment provides a possible implementation method, such as the hard disk 200 described above, which further includes a separation component. The separation component is disposed inside the sleeve 250 and is used to separate the first platter 251 and the second platter 252, or to stack the first platter 251 and the second platter 252.

[0095] Regarding the hardware implementation of the separation components, 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.

[0096] In the first possible implementation, the separation and stacking of 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 schematic diagram of the structure of a magnetic head assembly provided in this application. The magnetic head assembly includes: a sleeve 250 shown in Figure 2, a first platter 251 and a second platter 252, as well as a first hole structure 271 and an air filling structure 273.

[0098] The head assembly may also include other platters (not shown in FIG5A) fitted onto the sleeve 250. FIG5A is only an example illustration of the implementation of the separate assembly with the first platter 251 and the second platter 252.

[0099] The first hole structure 271 penetrates both the inner and outer walls of the sleeve 250. Exemplarily, the first hole structure 271 includes multiple through holes spaced apart circumferentially around the sleeve 250. Since each platter is fitted onto the sleeve 250, multiple through holes (e.g., 2, 3, 4, 5, 6, or other numbers) are arranged circumferentially around the sleeve. When air or other gases are channeled through these through holes, the platter corresponding to the position of the through holes opens, allowing the read / write head to extend into the gap between the first and second platters to access the data stored on either the first or second platter. Furthermore, the multiple through holes can simultaneously discharge gas, allowing the upper platter (e.g., the first platter) and the lower platter (e.g., the second platter) to open smoothly as a whole, avoiding the problem of one side of the upper platter opening while the other side remains in contact with the lower platter, thus improving the lifespan of each platter in the hard drive.

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

[0101] Please refer to Figure 5A. The aforementioned separation component includes an inflation structure 273. The inflation structure 273 is provided with an air inlet, which is detachably connected to the first hole structure 271.

[0102] The following description, based on Figure 5A and in conjunction with Figure 5B, provides an exemplary illustration. Figure 5B is a cross-sectional view of a magnetic head assembly provided in this application. The inflation structure 273 includes: an air inlet 273A and a plurality of air guide tubes, one end of each air guide tube being connected to the air inlet 273A, and the other end having an air outlet. For example, air guide tube 1 has an air outlet 1, and air guide tube 2 has an air outlet 2.

[0103] When the vent is aligned with the perforated structure on the sleeve, the perforated structure allows gas to be discharged, and the upward pressure provided by the discharged gas causes the two discs corresponding to the perforated structure to open.

[0104] For example, if the air outlet of the inflation structure 273 and the first hole structure are connected, as shown in Figure 5B, the air outlet 1 is aligned with the through hole (white circle) on the left side of the first hole structure in Figure 5A, and the air outlet 2 is aligned with the through hole (white circle) on the right side of the first hole structure, then the air outlet and the first hole structure 271 are connected, 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] For example, if the air inlet of the inflation structure 273 and the first hole structure are not connected, as shown in Figure 5B, the air outlet 1 is not aligned with the through hole (white circle) on the left side of the first hole structure in Figure 5A, and the air outlet 2 is not aligned with the through hole (white circle) on the right side of the first hole structure, then the air inlet and the first hole structure 271 are not connected, and the hole structure cannot conduct air or other gases, so that the adjacent discs (such as the first disc 251 and the second disc 252) are in a stacked state.

[0106] In practical use, the inflation structure may also include a control component for the air guide tube. This control component can control the air outlet of the air guide tube 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 in this embodiment. The number of air guide tubes included in the inflation structure can be set according to the hole structure on the sleeve, such as 2, 3, 4, 5, 6, or other numbers, etc. This application does not limit this.

[0107] In an optional configuration, the inflation structure 273 is rotatably connected to the sleeve 250. For example, the inflation structure 273 can rotate within the sleeve to allow the air inlet and the hole structure within the sleeve to be either connected or disconnected, thereby controlling the position of the multiple discs mounted on the sleeve to be opened.

[0108] Regarding the aforementioned hole structure, based on Figure 5A, this application also provides a possible example, as shown in Figure 6. Figure 6 is a second structural schematic diagram of a magnetic head assembly provided by this application. The difference between Figure 6 and Figure 5A 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 multiple platters also include a third platter 253, which is located on the side of the second platter 252 away from the first platter 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 projections of the third disc and the second disc 252 in the axial direction of the sleeve 250 are located on both sides of the second hole structure.

[0110] For example, if the air outlet of the inflation structure 273 and the second hole structure 272 are connected, the air outlet 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] For example, if the air inlet of the inflation structure 273 and the second hole structure 272 are not connected, the air inlet 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.

[0112] As shown in Figure 6, the projections of the first hole structure 271 and the second hole structure 272 onto the circumference of the sleeve 250 do not overlap. Therefore, the hole structures do not overlap in the circumference of the sleeve 250, which helps to improve the structural stability of the sleeve.

[0113] In Figure 6, the inflation structure 273 is rotatably connected to the sleeve 250. For example, the inflation structure 273 can rotate within the sleeve to make the air inlet and the hole structure inside the sleeve either connected or disconnected, so that the disconnected hole structure will not discharge air or other gases, while the connected hole structure will discharge them, thereby controlling the position of the multiple discs fitted on the sleeve to be opened.

[0114] It is worth noting that in some possible embodiments, the projections of the various hole structures in the circumferential direction of the sleeve 250 do not overlap. Therefore, during the rotation of the inflation structure 273 inside the sleeve 250, the air outlet can be aligned with the different hole structures provided on the sleeve 250. The air or other gas discharged from each hole structure is used to open the different platters stacked on the sleeve 250, so as to achieve precise control of the separation or stacking of the platters in the hard disk 200.

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

[0116] For example, the central angle α formed by the projection of the adjacent hole structure onto the circumference of the sleeve 250 and the central axis of the inflation structure 273 is 360° / N, where N is the number of platters stacked on a single sleeve in the hard disk.

[0117] For example, if the number of platters stacked in the hard drive is 90, the central angle formed by the projection of two adjacent hole structures onto the circumference of the sleeve 250 and the central axis of the inflation structure 273 is 4°. That is, the inflation structure rotates 4° to align with the hole structure of one layer of platters to release air, and maintains this alignment on the upper platters.

[0118] For example, if the number of platters stacked in a hard drive is 60, then the central angle formed by the projection of two adjacent hole structures onto the circumference of the sleeve 250 and the central axis of the inflation structure 273 is 6°. That is, the inflation structure rotates 6° to align with one layer of hole structures to release air, and maintains this alignment on the upper layer of platters.

[0119] For example, if the number of platters stacked in the hard drive is 45, then the central angle formed by the projection of two adjacent hole structures onto the circumference of the sleeve 250 and the central axis of the inflation structure 273 is 8°. That is, the inflation structure rotates 8° to align with the hole structure of one layer of platters to release air, and maintains this alignment on the upper platters.

[0120] The above three examples are merely optional methods provided in this embodiment. The number of platters mounted on a single sleeve in the hard drive varies, resulting in different central angles formed between the projections of two adjacent hole structures onto the circumference of the sleeve 250 and the central axis of the inflation structure 273. This will not be elaborated upon here. For example, the number of platters can be a positive integer greater than or equal to 2. The maximum number of platters can be determined based on the minimum thickness of a single platter and the thickness of the hard drive frame. Taking the current thinnest glass substrate thickness of 0.12mm and the thickness of a 3.5-inch hard drive frame of 26mm as an example, the maximum number of platters could be (26mm - 2 × 2mm) / (2 × 0.12mm) ≈ 90, where 2mm is the thickness of one side of the hard drive frame, and 2 × 0.12mm is the thickness reserved for each platter during the manufacturing process to ensure optimal 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, then the distance between the centers of 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 some other possible embodiments, the projections of the various hole structures on the circumference of the sleeve 250 overlap, and the inflation 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 discharged from each hole structure is used to open the different platters stacked on the sleeve 250 to achieve precise control of the separation or stacking of the platters in the hard disk 200.

[0123] For the hardware implementation of the separate components, a second possible implementation method is provided below.

[0124] In the second possible implementation, the separation (opening) and stacking of 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 schematic diagram of the structure of a magnetic head assembly provided in this application. The magnetic head assembly includes: a sleeve 250 shown in Figure 2, a first platter 251 and a second platter 252, as well as a first assembly part 281 and a support member 283.

[0126] The head assembly may also include other platters (not shown in FIG7) fitted on the sleeve 250. FIG5A only illustrates the implementation of the separate assembly by way of example with the first platter 251 and the second platter 252.

[0127] Referring to Figure 7, the sleeve 250 is provided with a first mounting portion 281. The aforementioned separation assembly includes a support member 283, which is detachably connected to the first mounting 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.

[0128] For example, the support member 283 may be a telescopic structure that can extend from the inside to the outside of the sleeve 250. The support member 283 may include a plurality of pins, such as the plurality of pins being spaced apart circumferentially along the sleeve 250.

[0129] Accordingly, the first assembly 281 includes a plurality of slots spaced circumferentially along the sleeve 250. In Figure 7, each slot corresponds to a white square shape.

[0130] Regarding the process of the support member 283 and the first assembly part 281 cooperating to open the disk, this embodiment provides a possible example, as shown in FIG8, which is a cross-sectional view between the first assembly part and the support member in the head assembly of FIG7. The support member 283 includes a plurality of pins, such as pins 1 to pins 4, spaced apart axially along the sleeve 250; the first assembly part 281 includes a plurality of slots spaced apart circumferentially along the sleeve 250.

[0131] The aforementioned pins and sockets are detachably connected in a one-to-one correspondence. For example, pin 1 corresponds to socket 1, pin 2 to socket 2, pin 3 to socket 3, and pin 4 to socket 4. When the pins and sockets are connected, these pins can be used to support the disc to be opened.

[0132] For example, each pin can be made into a prismatic structure, a wedge-shaped structure (as shown in Figure 8), or other arc-shaped structures to reduce wear on the disc caused by the pin protruding from or retracting from the sleeve at the assembly point, thereby improving the disc's service life. Each pin corresponds one-to-one with each slot arranged 250° around the sleeve, so that when the pin extends into the slot, these multiple pins can be used to support the disc, creating a gap between adjacent discs.

[0133] In this example, multiple platters stacked on a sleeve are opened using an assembly and a support, allowing the read / write head to reach between adjacent platters to access the data stored in the opened platters.

[0134] It is worth noting that Figure 8 illustrates the support member with four pins as an example. However, in some possible examples, the support member may include more or fewer pins, such as two pins, three pins, five pins, or other numbers, etc. This application does not limit this. In this embodiment, the extension and retraction of each pin can be achieved by the drive member 241, motor 242, or other drive devices shown in Figure 2, which will not be elaborated here.

[0135] The key feature of this embodiment is the introduction of a dynamic detachable disk pin design, which allows the storage capacity on the disk to be dynamically displayed for read and write operations by the read / write head, thereby increasing the number of disks in the hard drive and expanding the hard drive's storage capacity.

[0136] It should be understood that other mounting portions may be provided on the sleeve to open different platters in the head assembly. Based on Figure 7, a possible example is provided below, as shown in Figure 9, which is a schematic diagram of the structure of a head assembly provided in this application. The difference between Figure 9 and Figure 7 is that the sleeve 250 also provides a second mounting portion 282, which also includes multiple slots arranged circumferentially along the sleeve 250. The aforementioned multiple platters also include a fourth platter 254, which is located on the side of the first platter 251 away from the second platter 252 and is slidably connected to the sleeve 250.

[0137] The support member 283 is detachably connected to the second assembly part 282 and is also 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.

[0138] In this example, different assemblies correspond to the gaps between different platters that need to be opened, so that when the support is connected to different assemblies, the support can open different platters, allowing the read / write head to reach between adjacent platters to access the data stored in the opened platters.

[0139] In this example, the thickness of hard drive 200 is 12.5mm-26mm. For a 2.5-inch hard drive enclosure, the thickness of hard drive 200 can be set to 12.5mm, and multiple stacked platters can be arranged within the hard drive to increase the number of platters and storage capacity that the 2.5-inch hard drive enclosure can hold. For a 3.5-inch hard drive enclosure, the thickness of hard drive 200 can be set to 26mm, and multiple stacked platters can be arranged within the hard drive to increase the number of platters and storage capacity that the 3.5-inch hard drive enclosure can hold. Of course, the thickness of the hard drive 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 this application may exist independently or may be located on a hard disk, and this application does not limit this.

[0141] Based on the hard disks provided in the above embodiments, this application also provides a hard disk management method. This hard disk management method is applied to the hard disks provided in any of the above embodiments, as shown in FIG10, which is a schematic flowchart of a hard disk management method provided in this application. The hard disk management method includes the following steps S101 to S103.

[0142] S101, Processor 210 receives a data access request.

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

[0144] S102, the processor 210 determines the first and second disks 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 platters among the multiple platters included in the hard disk, and this application does not limit this.

[0146] S103, the processor 210 controls the read / write head to extend between the first and second platters to access either the first or second platter.

[0147] In this embodiment, the platters in the hard drive are slidably connected to the sleeve, and the platters can be stacked on the sleeve, allowing for a larger number of platters to be placed in a single hard drive, thereby increasing the storage capacity of the hard drive. Furthermore, during data access, the processor controls the read / write head to extend between different platters according to the address to be accessed, solving the problem of the read / write head being unable to access data due to the lack of gaps between stacked platters.

[0148] As an optional implementation, this embodiment also provides a possible example for step S103 above: 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 slide bar, so that the head aligns with the gap.

[0149] It should be understood that Figure 2 only shows one set of slide bar + head arm + head, but the hard drive may also have 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. These multiple sets of access components can be set on one slide bar, and these multiple sets of access components are set on different slide bars.

[0150] For more details on the process and benefits of hard drive management methods, please refer to the descriptions in Figures 2 to 9 above, which will not be repeated here.

[0151] To further illustrate the beneficial effects of the embodiments of this application, FIG11 provides a possible comparison example. FIG11 is a comparison diagram of a hard disk provided by this application.

[0152] The situation in Figure 11 (1) corresponds to the structure of a hard disk in conventional technology. Each read / write head is fixed and spaced apart from each other. A gap needs to be reserved between the read / write heads. Only 10-13 platters can be set in a 3.5-inch hard disk frame, and the storage capacity of the hard disk is relatively small.

[0153] The case (2) in Figure 11 corresponds to the structure of the hard disk in this application, and the hard disk is in standby mode. The read / write head can slide on the slide bar with the read / write head arm, and there is no need to reserve a gap between the read / write heads between the platters.

[0154] The situation (3) in Figure 11 corresponds to the structure of the hard disk in this application, and the hard disk is in use. The read / write head can slide on the slide bar along with the read / write head arm. The hard disk opens or closes (stacks) the disk according to the address to be accessed.

[0155] In cases (2) and (3) of Figure 11, approximately 45-90 platters can be placed in the 3.5-inch hard disk frame, which greatly increases the number of platters that can be placed in the hard disk frame and increases the storage capacity of the hard disk frame.

[0156] This application also provides a storage system. The storage system includes a hard disk as provided in any of the foregoing embodiments, and a controller. The hard disk is used to store data, and the controller is used to access the hard disk according to data access requests. 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.

[0157] The processor includes one or more processor cores, and the processor can be a very large-scale integrated circuit. An operating system and other software programs are installed in the processor, enabling it to access hard drives and various Peripheral Component Interconnect Express (PCIe) devices. The processor includes one or more processor cores. These processor cores can be, for example, CPUs or other ASICs. 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 practical applications, the storage system may 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., used to cache data from the hard disk for processor processing. Additionally, other storage media can also be read-only memory (ROM). For example, read-only memory can be programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), etc. This embodiment does not limit the number or type of other storage media. Furthermore, other storage media can be configured to have power-saving functionality. Power-saving functionality means that when the system experiences a power outage and is then powered on again, the data stored in the memory will not be lost. Storage media with power-saving functionality are called non-volatile memory.

[0159] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Various equivalent modifications or substitutions can be conceived within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A hard disk, characterized in that, include: Sleeve; Multiple discs are mounted on the sleeve, including: an adjacent first disc and a second disc; the first disc is slidably connected to the sleeve, and the second disc is slidably connected to the sleeve. A 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 component is disposed inside the sleeve for separating the first disc and the second disc, or stacking the first disc and the second disc.

3. The hard disk according to claim 2, characterized in that, The sleeve has a first hole structure that 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 along 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 includes: An inflatable structure is provided with an air inlet, and the air inlet and the first hole structure are detachably connected; If the gas inlet and the first hole structure are in a connected state, the gas inlet 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 3-5, characterized in that, The first hole structure includes multiple through holes, which are spaced apart circumferentially along the sleeve.

7. The hard disk according to any one of claims 3-6, characterized in that, The sleeve is further provided with a second hole structure, which penetrates the inner wall and the outer wall of the sleeve; The multiple discs also include: The third disc 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 along 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 part; The separation component includes a support member, which is detachably connected to the first assembly part 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.

10. The hard disk according to claim 9, characterized in that, The sleeve is further provided with a second assembly part; The hard drive also includes: The fourth disc is located on the 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 part 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 includes a plurality of slots, which are spaced apart circumferentially along the sleeve; The support includes a plurality of pins, which are spaced apart circumferentially along the sleeve, and one of the pins is detachably connected to one of the slots.

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

13. The hard disk according to claim 12, characterized in that, The first connecting part has a groove structure, and the second connecting part has a protrusion structure; Alternatively, the second connecting part may be a groove structure, and the first connecting part may be a protrusion structure.

14. The hard disk according to any one of claims 1-13, characterized in that, Also includes: The sliding rod extends in a direction 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 slide rod.

15. The hard disk according to claim 14, characterized in that, Also includes: The 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 read / write head and the second read / write head access one of the plurality of discs, the first read / write head is used to access the first track of the disc, and the second read / write head is used to access the second track of the disc.

16. The hard disk according to any one of claims 1-15, characterized in that, Also includes: An auxiliary positioning structure extends in a direction parallel to the axis 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 1-16, characterized in that, The thickness of the hard drive is 12.5mm-26mm.

18. A hard disk management method, characterized in that, Applied to a hard disk, the hard disk includes: a sleeve, multiple platters, read / write heads, and a controller; The plurality of discs are all mounted on the sleeve, including: an adjacent first disc and a second disc, wherein the first disc is slidably connected to the sleeve and the second disc is slidably connected to the sleeve; The method includes: The controller receives a data access request, which carries the address to be accessed. The controller determines the first disk and the second disk to be opened based on the address carried in the data access request. The controller controls the read / write head to extend between the first disk and the second disk to access either the first disk or the second disk.

19. The method according to claim 18, characterized in that, The hard drive further includes: a separation assembly, a slide bar, and a head arm. The separation assembly is disposed inside 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 slidably connected to the slide bar. The controller controls the read / write head to extend between the first and second platters, including: The controller 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 controller controls the magnetic head arm to slide along the extension direction of the slide bar, so that the magnetic head aligns with the gap.

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

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