TWI820814B - Storage system and drive recovery method thereof - Google Patents

Abstract

A storage system and drive recovery method thereof are provided. The method includes the following steps. In response to a failure event of a storage device, whether the storage device exists is determined. In response to determining that the storage device exists, the storage device is added to a recovery attempt list. Whether the number of devices in a recovery ongoing list is less than a threshold value is determined. In response to determining that the number of devices in the recovery ongoing list is less than or equal to the threshold value, a power reset operation is immediately performed on the storage device.

Description

Storage system and its hard drive recovery method

The present invention relates to a storage system, and in particular, to a storage system and a hard disk recovery method thereof.

For Network Attached Storage (NAS) devices with multiple hard drives, the hard drive may become disconnected from the system host from time to time. There are many reasons for the above situation. It may be that the hard drive itself is damaged, or it may be that the hard drive backplane or the hard drive control chip is faulty, etc. Maintenance personnel often need to obtain the physical device and perform a copy operation on the hard drive before they can possibly find the reason for the disconnection between the hard drive and the system. This is often time-consuming and labor-intensive.

Generally speaking, if the problem of disconnection between the hard disk and the system is not caused by the hard disk itself being damaged, the user can re-insert the hard disk and re-establish the connection with the system, so that the hard disk can read and write. Operation returns to normal. However, if the user cannot immediately reach the location of the network-attached storage device to restart the network storage device or re-plug the hard drive, the disconnected hard drive will not be able to resume operation for a long time. At this moment, if the disconnected hard disk belongs to an established redundant array of independent disks (RAID), the RAID will be degraded and be at high risk of losing data.

In view of this, embodiments of the present invention provide a storage system and a hard disk recovery method thereof, which can solve the above technical problems.

The hard disk recovery method of the storage system according to the embodiment of the present invention includes (but is not limited to) the following steps. In response to a failure event of a storage device, determine whether the storage device exists. In response to determining that the storage device exists, the storage device is added to a list of devices to be restored. Determine whether the number of devices that resume execution of the device list is less than or equal to a threshold. In response to determining that the number of devices that resume execution of the device list is less than or equal to the threshold, a power restart operation is immediately performed on the storage device.

The storage system according to the embodiment of the present invention includes at least one storage device and a processor. A processor is connected to the storage device and configured to perform the following steps. In response to a failure event of a storage device, determine whether the storage device exists. In response to determining that the storage device exists, the storage device is added to a list of devices to be restored. Determine whether the number of devices that resume execution of the device list is less than or equal to a threshold. In response to determining that the number of devices that resume execution of the device list is less than or equal to the threshold, a power restart operation is immediately performed on the storage device.

Based on the above, in embodiments of the present invention, when a storage device fails and cannot operate normally, the storage device will be added to the list of devices to be restored. When the number of devices recorded in the recovery execution device list is less than or equal to the threshold, the storage device can be automatically and immediately powered on to try to restore the storage device to normal operation. In this way, the disconnected storage device can be restored to normal operation as soon as possible and the risk of data loss can be reduced.

In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, embodiments are given below and described in detail with reference to the accompanying drawings.

Some embodiments of the present invention will be described in detail with reference to the accompanying drawings. The component symbols cited in the following description will be regarded as the same or similar components when the same component symbols appear in different drawings. These embodiments are only part of the present invention and do not disclose all possible implementations of the present invention. Rather, these embodiments are merely examples of methods and systems within the scope of the patent application of the present invention.

FIG. 1 is a block diagram of a storage system according to an embodiment of the present invention. Please refer to FIG. 1 , the storage system 10 includes at least one storage device 110_1˜110_N, a processor 120, and a memory 130. In some embodiments, the storage system 10 may be implemented as a Network Attached Storage (NAS) device or other types of network servers.

The storage devices 110_1 to 110_N are, for example, solid state drives (Solid State Drives, SSDs) or hard disk drives (Hard Disk Drives, HDDs), and the present invention is not limited thereto. In addition, the present invention does not limit the number of storage devices 110_1 to 110_N. In some embodiments, some or all of the storage devices 110_1˜110_N may form a redundant array of independent disks (RAID). It should be noted that the storage system 10 also includes multiple device bays (Bays). Each device slot is provided with an electrical slot. These electrical slots are, for example, SATA slots or U.2 PCIe slots, but the invention is not limited thereto. These storage devices 110_1 to 110_N are suitable for being placed in these device slots, so that the storage devices 110_1 to 110_N can be inserted into corresponding electrical slots and connected to the processor 120 .

The processor 120 may be a central processing unit (CPU), a general-purpose processor, or other programmable general-purpose or special-purpose microprocessor (Microprocessor), or a digital signal processor (Digital Signal Processor, DSP). , programmable controller, Field Programmable Gate Array (FPGA), Application-Specific Integrated Circuit (ASIC) or other similar components or a combination of the above components.

The memory 130 can be used to store instructions, program codes, software modules, etc., and can be, for example, any type of fixed or removable random access memory (RAM), read-only memory (read -only memory (ROM), flash memory (flash memory) or other similar devices, integrated circuits and combinations thereof.

The processor 120 can access and execute the software module recorded in the memory 130 to implement the hard disk recovery method in the embodiment of the present invention. The software modules described above may be broadly construed to mean instructions, instruction sets, code, code, programs, applications, software packages, threads, programs, functions, etc., whether referred to as software, firmware, middleware or the like. Software, microcode, hardware description language, or others.

FIG. 2 is a flow chart of a hard disk recovery method of a storage system according to an embodiment of the present invention. Please refer to Figure 2. The method in this embodiment can be executed by the storage system 10 in Figure 1. The details of each step in Figure 2 will be described below with reference to the components shown in Figure 1. In addition, in order to make the concept of the present invention easier to understand, the following description will take the failure of the storage device 110_1 as an example.

In step S202, the processor 120 detects a fault event of the storage device 110_1. Specifically, in some embodiments, when the processor 120 cannot detect the storage device 110_1 or cannot identify the storage device 110_1, it means that a failure event of the storage device 110_1 occurs, and the processor 120 will also detect the storage device 110_1. Fault event of 110_1. From another point of view, in some embodiments, when the connection between the processor 120 and the storage device 110_1 is interrupted, it means that a failure event of the storage device 110_1 occurs, and the processor 120 will also detect the failure of the storage device 110_1 event.

In step S204, in response to the failure event of the storage device 110_1, the processor 120 determines whether the storage device 110_1 exists. In other words, the processor 120 will determine whether the storage device 110_1 is still plugged into the electrical socket. If the storage device 110_1 has been pulled out of the electrical socket, the processor 120 determines that the storage device 110_1 does not exist. On the contrary, if the storage device 110_1 is plugged into the electrical socket, the processor 120 determines that the storage device 110_1 exists.

If the determination in step S204 is yes, in step S206, in response to determining that the storage device 110_1 exists, the processor 120 adds the storage device 110_1 to a list of devices to be restored. That is, when the storage device 110_1 in which a fault event occurs is still plugged into the electrical slot, the processor 120 can add the storage device 110_1 to the list of devices to be restored. In other words, the storage devices recorded in the device list to be restored have all experienced failure events and are still plugged into the electrical slots.

Next, in step S208, the processor 120 determines whether the number of devices that resume executing the device list is less than or equal to the threshold. Specifically, the storage devices recorded in the recovery execution device list are from the device list to be recovered. Furthermore, all storage devices recorded in the recovery execution device list are undergoing recovery operations, and the recovery operations may include power restart operations and data reconstruction operations. The processor 120 will count the number of devices that restore and execute the storage devices recorded in the device list, and determine whether the number of devices is less than or equal to the threshold.

In some embodiments, the storage system 10 may include M device slots, and the storage device 110_1 is inserted into one of the M device slots. The threshold used to compare with the number of devices recorded in the recovery execution device list may be the number M of device slots multiplied by a preset ratio. The above preset ratio can be one-half or other ratios. That is, the threshold value is a value less than or equal to M. For example, assuming the default ratio is one-half, the threshold value is M/2.

If the determination in step S208 is yes, in step S210, in response to the determination that the number of devices for resuming execution of the device list is less than or equal to the threshold value, the processor 120 immediately performs a power restart operation on the storage device 110_1. On the other hand, if the determination in step S208 is negative, in step S212, in response to the determination that the number of devices for resuming execution of the device list is not less than or equal to the threshold, the processor 120 performs a power restart operation on the storage device 110_1 after waiting for an elapsed time. For example, assuming that the storage system 10 can include 4 device slots and the default ratio is one-half, the threshold value is equal to 4/2=2. When the threshold value is 2, the processor 120 can only perform power restart operations on up to two storage devices at the same time. As another example, assuming that the storage system 10 can include 5 device slots and the preset ratio is one-half, the threshold value is equal to 5/2=2.5. When the threshold value is 2.5, the processor 120 can only perform power restart operations on up to two storage devices at the same time.

That is to say, when the number of storage devices in the recovery execution device list that are undergoing recovery operations is less than or equal to the threshold value, the processor 120 can immediately perform a power restart operation on the storage device 110_1 so that the storage device 110_1 starts the recovery operation. . When the storage device 110_1 performs a power restart operation, the storage device 110_1 is first powered off and then powered on. On the other hand, when the number of storage devices in the recovery execution device list that are undergoing recovery operations is not less than or equal to the threshold value, the processor 120 may suspend the power restart operation on the storage device 110_1 so that the storage device 110_1 waits for a period of time. The recovery operation begins after the time has elapsed. This can avoid having too many storage devices perform power restart operations at the same time, causing excessive power load on the storage system 10 .

Other examples will be enumerated below to illustrate other implementation aspects of the present invention. However, in order to facilitate a clear explanation of the present invention, the following embodiments will continue to take a failure event of the storage device 110_1 as an example.

FIG. 3 is a block diagram of a storage system according to an embodiment of the present invention. Referring to FIG. 3 , the storage system 10 also includes a GPIO (General Purpose Input/Output) interface 140 , a power supply device 150 , and a switching device 160 . It should be noted that the storage device 110_1 in the storage system 10 can be connected to the processor 120 through the GPIO interface 140. The processor 120 can detect whether the storage device 110_1 is plugged into the electrical slot through the GPIO pin of the GPIO interface 140 . In some embodiments, when the GPIO pin for detecting the connection status has a high level, the processor 120 may determine that the storage device 110_1 is plugged into the electrical socket. When the GPIO pin for detecting the connection status has a low level, the processor 120 can determine that the storage device 110_1 is pulled out of the electrical socket.

In addition, the switching device 160 is connected between the storage device 110_1 and the power supply device 150, and the switching device 160 is connected to the processor 120 through the GPIO interface 140. The processor 120 can control the switching device 160 to be turned on or off to control whether the power output by the power supply device 150 is provided to the storage device 110_1. The switching device 160 is, for example, a fuse (eFuse IC). In some embodiments, the processor 120 may provide a switch control signal to the switch device 160 through a GPIO pin of the GPIO interface 140 . When the GPIO pin used to control power supply has a high level, the switching device 160 is turned on to provide power to the storage device 110_1. When the GPIO pin used to control power supply has a low level, the switch device 160 is turned off and stops supplying power to the storage device 110_1. It should be noted that although FIG. 3 only takes the storage device 110_1 as an example for illustration, other storage devices 110_2 to 110_N can be connected to the processor 120 based on similar hardware configurations.

FIG. 4 is a flow chart of a hard disk recovery method of a storage system according to an embodiment of the present invention. Referring to FIG. 4 , the method of this embodiment can be executed by the storage system 10 in FIG. 3 . The details of each step in FIG. 4 will be described below with reference to the components shown in FIG. 3 .

In step S402, the processor 120 detects a fault event of the storage device 110_1. In step S404, when the processor 120 detects a fault event of the storage device 110_1, the processor 120 determines whether the electrical slot of the storage device 110_1 supports the power control function. Specifically, as shown in FIG. 3 , if the electrical socket of the storage device 110_1 is connected to the power supply device through the switch device 160 controllable by the processor 120 , it means that the electrical socket of the storage device 110_1 supports the power control function. That is, the processor 120 can control the power supply of the storage device 110_1 by controlling the switching device 160 to be on or off, so as to have the ability to control the storage device 110_1 to perform a power restart operation.

If the determination in step S404 is yes, in step S406, the processor 120 determines whether the electrical slot of the storage device 110_1 supports the presence detection function. Specifically, as shown in FIG. 3 , if the electrical slot of the storage device 110_1 is connected to the processor 120 via a GPIO pin and the GPIO pin is used to detect whether the storage device 110_1 is plugged into the electrical slot, it represents that the storage device The electrical slot of 110_1 supports presence detection function.

If the determination in step S406 is yes, in step S408, the processor 120 determines whether the storage device 110_1 exists. The detailed operations in step S408 can be referred to the foregoing embodiments and will not be described again here. It should be noted that if the determination in step S408 is yes, in step S410, the processor 120 determines whether the number of power restart operations on the storage device 110_1 exceeds the once threshold. For example, the processor 120 may determine whether the storage device 110_1 performs power restart operations more than 5 times in a day. However, the number of times threshold can be designed according to actual applications, and the present invention is not limited thereto.

Specifically, if the processor 120 performs too many power restart operations on the storage device 110_1 within a unit time, it means that the storage device 110_1 itself may have been damaged. Therefore, repeated power restart operations cannot restore the storage device 110_1 Return to normal operations. Therefore, if the determination in step S410 is yes, the processor 120 may give up restoring the storage device 110_1.

On the other hand, if the determination in step S410 is negative, in step S412, in response to determining that the number of power restart operations on the storage device 110_1 does not exceed the number threshold, the processor 120 adds the storage device 110_1 to the list of devices to be restored. In step S414, the processor 120 determines whether the number of devices that resume execution of the device list is less than or equal to the threshold. If the determination in step S414 is yes, in step S416, in response to the determination that the number of devices for resuming execution of the device list is less than or equal to the threshold value, the processor 120 immediately performs a power restart operation on the storage device 110_1. On the other hand, if the determination in step S414 is negative, in step S418, in response to the determination that the number of devices for resuming execution of the device list is not less than or equal to the threshold, the processor 120 performs a power restart operation on the storage device after waiting for an elapsed time. The detailed operation methods of steps S412 to S418 can be referred to the description of the embodiment in FIG. 2 and will not be described again here.

FIG. 5 is a flow chart of a hard disk recovery method of a storage system according to an embodiment of the present invention. Referring to FIG. 5 , the method of this embodiment can be executed by the storage system 10 in FIG. 1 . The details of each step in FIG. 2 will be described below with reference to the components shown in FIG. 1 .

In step S502, the processor 120 detects a fault event of the storage device 110_1. In some embodiments, when the processor 120 does not receive a reply message from the storage device 110_1, the processor 120 determines that a fault event of the storage device 110_1 is detected. For example, assuming that the processor 120 and the storage device 110_1 communicate using the SATA protocol, when the processor 120 cannot receive the frame D2h sent by the storage device 110_1, the processor 120 can determine that the storage device 110_1 has been detected. Failure event, but the present invention is not limited to this.

In some embodiments, after the storage devices 110_1˜110_N complete initialization and installation, the processor 120 will begin to detect fault events of the storage devices 110_1˜110_N. In some embodiments, during the early stage of installing the storage devices 110_1 to 110_N, the processor 120 may initialize the storage devices 110_1 to 110_N, and record and save the data configuration information of the storage devices 110_1 to 110_N. The aforementioned data configuration information may include the disk array level and the disk array to which each storage device 110_1 ~ 110_N belongs. Specifically, the storage devices 110_1 to 110_N can be assigned to one or more disk arrays (also called disk array groups) according to requirements, and these disk arrays can correspond to different disk array levels, such as RAID. -5 or RAID-6 and so on.

In step S504, the processor 120 determines whether the storage device 110_1 exists. If the determination in step S504 is yes, in step S506, the processor 120 adds the storage device 110_1 to the list of devices to be restored. In step S508, the processor 120 determines whether the number of devices that resume execution of the device list is less than or equal to the threshold. The detailed operation methods of steps S504 to S508 can be referred to the foregoing embodiments, and will not be described again here.

It is worth mentioning that in some embodiments, the threshold used for comparison with the number of devices recorded in the recovery execution device list may be configured according to the disk array level to which the storage device 110_1 belongs. Specifically, when the storage device 110_1 corresponds to the first disk array level, the threshold value may be the first value. When the storage device 110_1 corresponds to the second disk array level, the threshold value may be the second value. The first value is different from the second value. Specifically, for a disk array class with a higher number of fault-tolerant hard disks, the threshold value may be set to a lower first value. For disk array classes with a lower number of fault-tolerant drives, the threshold can be set to a higher second value. For example, when the storage device 110_1 belongs to RAID-6, the threshold value may be a lower first value to minimize the power burden of the storage system 10 when the disk array is less likely to be degraded. When the storage device 110_1 belongs to RAID-5, the threshold value may be a higher second value, so that the storage device 110_1 can be restored as quickly as possible when the disk array is easily degraded.

If the determination in step S508 is yes, in step S510, in response to determining that the number of devices for restoring the execution device list is less than or equal to the threshold, the processor 120 removes the storage device 110_1 from the device list to be restored and adds the storage device 110_1 to Restore execution device list. That is, in response to determining that the number of devices in the recovery execution device list is less than or equal to the threshold, the storage device 110_1 will move from the device list to be recovered to the recovery execution device list. In step S512, in response to the storage device 110_1 being moved from the recovery device list to the recovery execution device list, the processor 120 immediately performs a power restart operation on the storage device 110_1, for example, by controlling the switch device 160 shown in FIG. 3 to power the storage device 110_1. Perform power off and on.

If the determination in step S508 is negative, in step S522, in response to the determination that the number of devices for resuming execution of the device list is not less than or equal to the threshold, the processor 120 performs a power restart operation on the storage device 110_1 after waiting for an elapsed time. In some embodiments, after waiting for an elapsed time, in response to the fact that the number of devices that resume executing the device list switches from being less than or equal to the threshold value to being less than or equal to the threshold value, the processor 120 performs a power restart operation on the storage device 110_1. In some embodiments, the storage devices recorded in the recovery execution device list will be removed after the recovery operation is completed. Therefore, the number of devices that are restored to the execution device list will be reduced as their recorded storage devices complete the restore operation.

In step S514, after performing a power restart operation on the storage device 110_1, the processor 120 determines whether the storage device 110_1 in the recovery execution device list has restored connection within a preset period of time. The above-mentioned preset period is, for example, 60 seconds, but the present invention is not limited thereto. For example, assuming that the processor 120 and the storage device 110_1 communicate using the SATA protocol, when the processor 120 receives the frame D2h sent by the storage device 110_1, the processor 120 can determine that the storage device 110_1 has restored the connection, but The present invention is not limited to this.

If the determination in step S514 is negative, it means that the storage device 110_1 cannot resume operation by restarting the power supply. Therefore, in step S524, the processor 120 gives up restoring the storage device 110_1. Afterwards, in step S520, the processor 120 removes the storage device 110_1 from the recovery execution device list.

On the other hand, if the determination in step S514 is yes, in step S516, the processor 120 determines whether the storage device 110_1 belongs to a disk array (RAID). In some embodiments, the processor 120 may determine whether the storage device 110_1 belongs to a disk array based on the data configuration information recorded during the initialization process of the storage device 110_1.

If the determination in step S516 is negative, it means that the storage device 110_1 does not need to perform a data reconstruction operation on the disk array. Afterwards, in step S520, the processor 120 removes the storage device 110_1 from the recovery execution device list.

If the determination in step S516 is yes, in step S518, in response to determining that the storage device 110_1 belongs to the disk array, the processor 120 performs a data reconstruction operation on the storage device 110_1 according to the rebuild function supported by the disk array. For example, if the disk array to which the storage device 110_1 belongs can support the fast rebuild function (such as the ZFS file system), the processor 120 performs a data reconstruction operation on the storage device 110_1 through the fast rebuild function. If the disk array to which the storage device 110_1 belongs supports the general reconstruction function, the processor 120 performs a data reconstruction operation on the storage device 110_1 through the general reconstruction function. After completing the data reconstruction operation, in step S520, the processor 120 removes the storage device 110_1 from the recovery execution device list.

FIG. 6 is a schematic diagram of an event log of a storage system according to an embodiment of the present invention. Referring to FIG. 6 , the processor 120 can record relevant information such as the content and time of events occurring in the storage system 10 as a log (Log) 61 , and the user can obtain the contents of the log 61 through an operating system. When the processor 120 is disconnected from the storage device 110_1, the processor 120 detects a failure event of the storage device 110_1, and the processor 120 records the failure event as a log message Msg1 in the log 61. Then, the processor 120 can perform a power restart operation on the storage device 110_1 to restore the connection between the storage device 110_1 and the processor 120 . The processor 120 records the event of the storage device 110_1 reconnecting as a log message Msg2 in the log 61 . Then, the processor 120 will perform a data reconstruction operation on the restored storage device 110_1, as shown in the log messages Msg3 and Msg4 in the log 61. It can be seen from this that after the storage device 110_1 fails, the storage device 110_1 can automatically restore to normal operation without human intervention and record the process of automatically restoring to normal operation through log records.

It should be noted that the processing procedure of the hard disk recovery method executed by at least one processor is not limited to the above embodiments. For example, part of the above steps (processing) may be omitted, or each step may be performed in other order. Furthermore, any two or more of the above steps may be combined, and part of the steps may also be modified or deleted. Alternatively, other steps may be performed in addition to the above steps.

To sum up, in the embodiment of the present invention, when the storage device fails and cannot operate normally, the storage device will be added to the list of devices to be restored. When the number of devices recorded in the recovery execution device list is less than or equal to the threshold, the storage device will be moved from the device list to be recovered to the recovery execution device list to automatically power cycle the storage devices in the recovery execution device list. In this way, the disconnected storage device can be restored to normal operation as soon as possible and the risk of data loss can be reduced. In addition, when the number of devices recorded in the recovery execution device list is not less than or equal to the threshold value, the power restart operation is performed on the storage device after waiting for an elapsed time. This can avoid too many storage devices performing power restart operations at the same time, causing excessive power load on the storage system.

Although the present invention has been disclosed above through embodiments, they are not intended to limit the present invention. Anyone with ordinary knowledge in the technical field may make some modifications and modifications without departing from the spirit and scope of the present invention. Therefore, The protection scope of the present invention shall be determined by the appended patent application scope.

10:Storage system

110_1～110_N: Storage device

120: Processor

130:Memory

140:GPIO interface

150:Power supply device

160:Switching device

Msg1～Msg4: Log message

S202～S212, S402～S418, S502～S524: steps

FIG. 1 is a block diagram of a storage system according to an embodiment of the present invention. FIG. 2 is a flow chart of a hard disk recovery method of a storage system according to an embodiment of the present invention. FIG. 3 is a block diagram of a storage system according to an embodiment of the present invention. FIG. 4 is a flow chart of a hard disk recovery method of a storage system according to an embodiment of the present invention. FIG. 5 is a flow chart of a hard disk recovery method of a storage system according to an embodiment of the present invention. FIG. 6 is a schematic diagram of an event log of a storage system according to an embodiment of the present invention.

S202~S212: steps

Claims (12)

A hard disk recovery method for a storage system, including: responding to a failure event of a storage device, determining whether the storage device exists; responding to determining that the storage device exists, adding the storage device to a list of devices to be restored ; Determine whether the number of devices in a recovery execution device list is less than or equal to a threshold value; and in response to determining that the number of devices in the recovery execution device list is less than or equal to the threshold value, immediately perform a power restart operation on the storage device , wherein the method further includes: in response to determining that the number of devices in the recovery execution device list is less than or equal to the threshold, removing the storage device from the device list to be restored and storing the storage device. The device is added to the recovery execution device list. The hard disk recovery method of the storage system according to claim 1, the method further includes: in response to determining that the number of devices in the recovery execution device list is not less than or equal to the threshold value, after waiting for an elapsed time, The storage device performs the power restart operation. The hard disk recovery method of the storage system according to claim 1, wherein the storage system includes a plurality of device slots, the storage device is inserted into one of the device slots, and the threshold value is the device The number of slots is multiplied by a preset ratio. The hard disk recovery method of the storage system according to claim 1, the method further includes: after performing the power restart operation on the storage device, determining whether the storage device in the recovery execution device list is in Restore the connection within a preset period; and in response to determining that the storage device is restored within the preset period, perform a data reconstruction operation on the storage device, and remove the storage device from the recovery execution device list removed. The hard disk recovery method of a storage system as claimed in claim 4, wherein in response to determining that the storage device is recovered within the preset period, the step of performing the data reconstruction operation on the storage device includes: determining that the Whether the storage device belongs to a disk array; and in response to determining that the storage device belongs to the disk array, perform the data reconstruction operation on the storage device according to the reconstruction function supported by the disk array. The hard disk recovery method of the storage system according to claim 1, wherein the step of adding the storage device to the list of devices to be restored includes: determining whether the number of times the power restart operation is performed on the storage device is Exceeding a number threshold; and in response to determining that the number of times the power restart operation is performed on the storage device does not exceed the number threshold, adding the storage device to the list of devices to be restored. A storage system including: At least one storage device; and a processor connected to the storage device and configured to: in response to a failure event of the storage device, determine whether the storage device exists; in response to determining that the storage device exists, convert the The storage device is added to a device list to be restored; it is determined whether the number of devices in a recovery execution device list is less than or equal to a threshold value; and in response to determining that the number of devices in the recovery execution device list is less than or equal to the threshold value, immediately Perform a power restart operation on the storage device, wherein the processor is further configured to: in response to determining that the number of devices in the device list to be restored is less than or equal to the threshold value, remove the storage device from the Remove the storage device from the list of devices to be restored and add the storage device to the list of recovery execution devices. The storage system of claim 7, wherein the processor is further configured to: in response to determining that the number of devices in the resume execution device list is not less than or equal to the threshold, after waiting for an elapsed time, The storage device performs the power restart operation. The storage system according to claim 7, further comprising a plurality of device slots, each of the storage devices is inserted into one of the device slots, and the threshold value is the number of the device slots multiplied by a preset Proportion. The storage system of claim 7, wherein the processor is further configured to: after performing the power restart operation on the storage device, determine whether the storage device in the recovery execution device list is in a Restore the connection within the preset period; and in response to determining that the storage device is restored within the preset period, perform a data reconstruction operation on the storage device, and move the storage device from the execution device list remove. The storage system of claim 10, wherein the processor is further configured to: determine whether the storage device belongs to a disk array; and in response to determining that the storage device belongs to the disk array, according to the The reconstruction function supported by the disk array performs the data reconstruction operation on the storage device. The storage system of claim 7, wherein the processor is further configured to: determine whether the number of times the power restart operation is performed on the storage device exceeds a threshold; and in response to determining that the number of power restart operations on the storage device is If the number of times the power restart operation is performed does not exceed the number threshold, the storage device is added to the list of devices to be restored.

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