JP2018106639A - Storage controller and storage control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage controller and a storage control method with improved convenience.SOLUTION: A version of firmware of a NAND flash 13 serving as an inner memory and a version of firmware of a hard disc drive 15 serving as one or a plurality of storage devices are compared to each other, then it is checked with reference to a decision table whether or not condition for maintaining storage details of the storage device of, for example, the hard disc drive 15 has been established, and if it has been established, action for maintaining the same storage details is enabled.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a storage control device and a storage control method, and more particularly to a storage control device and a storage control method suitable for housing and using one or a plurality of hard disk drives as a storage device.

Various control devices execute a control program called firmware. Firmware versions are updated to improve functionality. Some control devices are expected to have the latest version.
Patent Documents 1 and 2 disclose a technique for updating a predetermined control device when the firmware is not the latest.

JP 2009-80550 A JP 2002-278906 A

Usually, since one piece of firmware is held in the control device, it is recommended to hold the latest firmware.
On the other hand, a storage shared by connecting to a network includes a nonvolatile internal memory and one or a plurality of hard disk drives. The firmware of this storage is stored in the internal memory and the hard disk drive as a countermeasure against the failure of the hard disk drive. Conventionally, these firmwares have the same version. When restoring the hard disk, the firmware read from the internal memory is used. Therefore, if they do not match, different versions of firmware must be used.

However, if you want to use a hard disk with a different version of firmware, you must initialize the hard disk drive to make it the same version. Therefore, when using a hard disk drive that has been used until then, it is necessary to back up all the stored contents in advance and restore the stored contents again after initialization.
The present invention provides a storage control device and a storage control method that eliminate these operations and improve convenience.

  The present invention provides an internal memory for storing a first control program, a connection unit for connecting one or a plurality of storage devices for storing a second control program, the internal memory and the connection unit connected to the memory. A storage control device that controls storage of the device, wherein the control unit reads version information of the first control program as first version information at a predetermined timing; The configuration is such that the version information of the control program is read as the second version information, and a match between the read first version information and the second version information is determined.

  In the above configuration, the storage control device includes an internal memory that stores the first control program, a connection unit that connects one or more storage devices that store the second control program, and the internal memory and the connection unit. And a control unit connected to control the storage of the storage device. When one or more storage devices are connected, the storage device is controlled according to a predetermined control program.

In addition, the storage control device reads the version information of the first control program as the first version information and reads the version information of the second control program as the second version information at a predetermined timing. A match between the first version information and the second version information is determined.
Different control can be performed depending on whether they match or not.

As another aspect of the present invention, the control unit may display the read first version information and the second version information, wait for selection, and perform control corresponding to the selection.
The said structure WHEREIN: The said control part displays the read said 1st version information and said 2nd version information, and waits for selection. When the user selects which version is desired, the control unit performs control corresponding to the selection.

As another aspect of the present invention, the control unit may be configured to perform control for unifying version information corresponding to selection.
In the above configuration, the control unit performs control to unify version information in response to selection.

As another aspect of the present invention, the control unit holds the stored contents of the storage device when a predetermined condition is satisfied when performing control to unify the first version information in response to selection. It is also good.
In the above configuration, even if the selection is made to be unified with the first version information, the storage contents of the storage device are held when a predetermined condition is satisfied.
For example, if the first control program of the first version information is compatible with the second control program of the second version information, the selection of unifying the version of the control program is possible. The stored contents of the storage device can be retained.

As another aspect of the present invention, when the control unit performs control to unify the second version information of the one storage device in response to the selection, the control unit performs the other storage when a predetermined condition is satisfied. It is good also as a structure which hold | maintains the memory content of an apparatus.
In the above configuration, when the control unit performs control to unify the second version information of the one storage device corresponding to the selection, the stored contents of the other storage device when a predetermined condition is satisfied Hold.

  Even when the versions of the control programs of a plurality of storage devices are different, for example, if one of them is compatible with the other, the selection to unify the control program of one storage device with the version of the control program of another storage device Even so, the stored contents of the storage device can be retained.

As another aspect of the present invention, the control unit may format the storage device in response to selection.
In the configuration, the storage device is formatted in response to the selection. Regardless of whether or not the version information is unified, the storage device is formatted if selected by the user.

As another aspect of the present invention, the control unit displays the system ID when a different system ID is read in the storage device, waits for selection of the system ID, and performs control corresponding to the selection. It is also good.
In the above configuration, when controlling a plurality of storage devices, in addition to the problem of matching and mismatching of the versions of the control program, the system ID is individually set if the storage device is the same version but used by different storage control devices. Is done. For this reason, the user is prompted to select a system ID, and the storage contents of the storage device of the selected system ID are held as an example.

  According to the present invention, it is assumed that a control program having different version information may exist inside the control device, and the corresponding control is selected depending on whether or not the version information matches. You will be able to continue using the hard drive you have been using without formatting it.

1 is a block diagram showing a schematic configuration of a network storage to which a storage control device according to an embodiment of the present invention is applied. It is a flowchart corresponding to the control program which a control part performs. It is a figure which shows an example of the web page which a web server provides. It is a figure which shows the decision table which shows a response | compatibility with selection of the process preset for every combination, such as a disk state. It is a flowchart corresponding to a method of supplying the latest firmware and rewriting the firmware of the internal memory or HDD.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a schematic configuration of a network storage to which a storage control device according to an embodiment of the present invention is applied.
The network storage 10 includes a control unit 11 and performs various controls. The network storage 10 can use a RAID configuration as a prevention against a storage device failure to be described later. The control unit 11 is connected to a RAM (DDR3) 12 as a storage area used when the control program is executed and a NAND flash 13 that is nonvolatile and stores a predetermined control program. A hard disk drive 15 (HDD1 to HDD8) is connected to the control unit 11 via HDD connectors 14a and 14b. The hard disk drive 15 is an example of a detachable storage device, and includes an SSD configured only with a semiconductor in addition to a normal HDD having a mechanical configuration. In addition, it includes a wide range of removable storage devices, and is not limited thereto.
Here, the NAND flash 13 corresponds to an internal memory that stores the first control program, the hard disk drive 15 corresponds to one or a plurality of storage devices that store the second control program, and the HDD connectors 14a and 14b store. It corresponds to a connection part for connecting the devices.

A USB interface 16 is connected to the control unit 11 so that an external USB device can be connected via the USB connectors 17a and 17b. As an external USB device, for example, a USB memory or a USB storage device including a hard disk drive can be connected. Further, a network interface 18 is connected to the control unit 11 so that information can be recorded and read from the network storage 10 via the network, and various settings can be performed. .
As described above, the control unit 11 corresponds to a control unit that is connected to the internal memory and the connection unit and controls storage of the storage device.

  The hard disk drive 15 is accommodated in a predetermined HDD accommodating space 21 in the enclosure that accommodates the network storage 10, and can be freely attached and detached. Other configurations are also housed in this enclosure.

In the network storage 10, the control program is stored in both the NAND flash 13 and the hard disk drive 15. The control program executed by the control unit 11 normally uses a program stored in the hard disk drive 15. This is because the hard disk drive 15 has an abundance of usable storage areas, so that a control program that can be executed with a large capacity is stored. On the other hand, the NAND flash 13 stores a control program that has a relatively small capacity in consideration of the balance between the capacity of the storage area and the cost, and has been compressed to reduce the apparent capacity. Since it is uncertain whether a normal control program can be read from the failed hard disk drive 15 when the hard disk drive 15 fails, a preliminary control program is stored in the NAND flash 13.
As described above, the network storage 10 stores a plurality of the same type of control programs (firmware) at different locations in the device. This is very different from other electronic devices that perform control according to the control program.

Several usage examples are considered as a method of using this enclosure.
1. Install an unused hard disk drive and start a new use.
2. Install an existing hard disk drive.
2-1. A set of hard disk drives that have already realized a RAID configuration is used.
2-2. A plurality of sets of hard disk drives that have already realized a RAID configuration are used.
“1. Install an unused hard disk drive and start a new use” is the same as in the case of an existing network storage. Hereinafter, mainly 2. A pattern for mounting an already used hard disk drive will be described in detail.

  FIG. 2 is a flowchart corresponding to the control program executed by the control unit. Hereinafter, the operation of the network storage 10 will be described according to the flowchart of the control unit program.

  When the user starts using the network storage 10, the user installs a predetermined hard disk drive 15 and turns on the power. Then, the network storage 10 starts to be activated as follows.

First, in step S100, the control unit 11 checks the state of a disk (hereinafter, the hard disk drive 15 is simply referred to as a disk). The state of this disk includes the following items.
1) Is there one or more recognizable disks? 2) Is the disk firmware version information compatible with this network storage 10? 3) There are multiple system IDs (RAID IDs) on the connected disks. 4) There are four items indicating whether the firmware version information of the disk and the firmware version information of the NAND flash 13 match. In addition, check the model name and total capacity of each disk.

  Here, the version information of the firmware of the disk corresponds to the version information of the second control program in one or a plurality of storage devices, and the version information of the firmware of the NAND flash 13 is the first control stored in the internal memory. Corresponds to program version information. The process for determining the coincidence is as follows: “At predetermined timing, the version information of the first control program is read as the first version information, and the version information of the second control program is read as the second version information. Corresponds to the process of “determining a match between the read first version information and the second version information”, and the control unit 11 or the like executes this process. The process is a process performed at different timings, and it can be said that the present invention is also established as a method invention.

In addition, in the disk status confirmation in step S100, it is also confirmed whether or not a predetermined file exists on the disk as part of confirmation of whether or not the HDD is damaged.
In step S102, the condition determination of the activation mode is performed based on a predetermined rule.
First, in step S104, normal activation is permitted if a predetermined rule is met, but if not, it is activated in a drive setup mode other than normal activation. This content will be described later.

Next, with respect to the above four items, normal activation is permitted if the following conditions are satisfied, but if any one of these is not satisfied, activation is performed in a drive setup mode other than normal activation.
1) There is one or more discs that can be recognized (present)
2) The version information of the disk firmware is the version supported by the network storage 10 (present)
3) Multiple system IDs (RAID IDs) do not exist on the connected disk (single)
4) The firmware version information of the disk matches the firmware version information of the NAND flash 13 (same)

  Once the disk configuration is realized, these four items are established, and the predetermined file described above is recorded. Therefore, all the normal activation conditions are satisfied, and after the determination in step S104, the normal activation is performed in step S106, and the normal operation is performed in step S108.

  On the other hand, if the predetermined file does not exist on the disk, it is assumed that the disk configuration has never been implemented, and if any one of the above four items is not established, It is estimated that a response is necessary, and in order to perform this response, the system is started in the drive setup mode in step S110. When starting in the drive setup mode, in step S112, the user is notified that the start is in a mode different from the normal start. Although not shown in FIG. 1, an LCD (Liquid Crystal Display) and a speaker are provided for notification, and notification is performed by these.

  The network storage 10 can be set through the network, and the user refers to a web page provided by the network storage 10 by a browser of another PC connected to the network, and performs a predetermined operation. The setting etc. can be completed by doing. In step S114, network setting is performed so that the PC can be connected to the same network as that of another PC. In step S116, a web server is activated so that a web page that can be referred to from the PC is displayed.

FIG. 3 shows an example of a web page provided by the web server.
In the same page, “housing Fw Ver 2.20-2.22” is displayed on the upper right, and the firmware version of the control program stored in the NAND flash 13 is displayed.

In this page, “Disc Status System ID Fw Ver Model Name Total Capacity Representative Setup Operation” is displayed as the title line, and information corresponding to the title line is displayed in the form of a table for each disk connected below it. Is displayed.
Here, the “disk” is for identifying individual disks, and the identification codes 1 to 8 correspond to the respective connectors of the HDD connectors 14a and 14b, and are connected to the connectors corresponding to the identification code 1. The disk is displayed as “Disk 1”, and hereinafter, the same is displayed up to the identification code 8.
“Status” indicates that the control unit 11 is able to exchange a predetermined signal with each disc identified by the disc name to which the identification code is attached, and that “read / write” is indicated as “recognized”. A state where connection or reading / writing is impossible is displayed as “not connected”.

“System ID” indicates a system ID (RAID ID) stored in each disk. When a RAID is constructed by a plurality of disks, individual IDs are assigned. Even if the RAID type is the same, this system ID will be different if the set of constructed disks is different. By referring to the system ID, it is also known whether or not the combination can be reconstructed as a set of RAIDs.
“Fw Ver” displays the version of the control program stored in each disk. Along with the version information, whether the content is normal or damaged is also displayed.

“Model name” is the product name and model number of each disk, and “total capacity” is the total capacity.
“Representative” is a display column for selecting which disk is representative in the setup. For example, assuming that a plurality of system IDs exist, an operation is performed when selecting which RAID configuration of the system ID is to be utilized. In the present embodiment, if possible, at least the representative RAID configuration is processed so that the contents can be utilized so that the contents can be used without being erased.

The “setup operation” is a display field for selecting and operating specific processing contents that can be selected on the assumption that setup is necessary.
“▼ Format” is an option to format each disk. The contents stored in the disk are deleted, and then the control program stored in the NAND flash 13 is expanded and expanded. Saved to disk in both state and state.

“▼ FwUP” means that the version of the control program stored in each disk is upgraded to match the version of the control program stored in the NAND flash 13, and the control program stored in the NAND flash 13 Are stored on disk in both compressed and uncompressed state.
In this process, the version information of the disk is unified with the version information of the NAND flash 13.

“▼ FwV maintenance” means that the version of the control program stored in each disk is maintained regardless of the version of the control program stored in the NAND flash 13. Conventionally, the version of the control program stored in the disk is matched with the version of the control program stored in the NAND flash 13. The control program stored in the NAND flash 13 is copied and expanded on the disk when the system in the disk fails, but there are cases where the stored contents of the disk cannot be utilized. However, in this network storage 10, the control program stored in the NAND flash 13 is unconditionally stored in the version of the control program stored in the disk by using a control program having specifications that can make use of the storage contents of the disk. Don't match the program version.
Note that even if “▼ FwV maintenance” exists, if there are a plurality of versions of the control program stored on the disk, they are matched with one of the versions. In addition, “Remove” is selected when the disk is removed, “Reconfirm” is selected when a new disk is inserted, and “Execute” is selected when the selected setup operation is executed. This is a display button for selection.

In order to display the web page as described above, in step S120, the web server waits so that the web page shown in FIG. 3 can be displayed based on the state of the disk.
In this way, in step S120, the control unit 11 displays the disk status, displays the read first version information and second version information, and displays the system ID. In addition, after the disk status is displayed, the selection from the user is awaited and control corresponding to the selection is performed.

  The user accesses a web page provided by the web server. In order to access the web page, a PC browser may be activated.

If the user is selected in step S122 and the execute button is pressed, the corresponding disk reconstruction is started in step S128. When the reconstruction is completed, a notification is sent from the web page in step S130. In step S132, the system is restarted.
The user can be notified of this web page. Upon receiving the notification on the web page, the user knows that the system has been restarted and waits for the restart. As an example, the web page may display “Disk reconfiguration is complete. Reboot the system.”

The general process flow is as described above. Next, a specific disk state and selectable processes will be described.
FIG. 4 shows the correspondence with processing set in advance for each combination of disk status and the like. In this embodiment, such a combination of disk statuses and processing correspondence is called a decision table.
There are three processes prepared, which are named Act2, Act3, and Act4. Each selectable process is

Act2 is “▼ Format / ▼ FwUP”
Act3 is “▼ Format / ▼ FwUP / ▼ FwV Maintain”
Act4 is "▼ Format"
It is. Act2 and Act3 have a plurality of options, but Act4 can only select a format. Here, the combination of the states of all the disks is not described, but only a few cases are described.

  The decision table includes five disk states 1) to 5). The four items of the disk status are abbreviated here, 1) one or more disks, 2) Enclo-compatible Fw (firmware capable of FwUP and FW maintenance), and 3) a single system. ID, 4) Called Fw match. Further, in view of the operation of selecting the representative of the disk, here, the item of the state of the disk includes 5) presence or absence of damage to the control program (“representative Fw”) of the representative disk. For the Fw match, the firmware version of the disk selected as the representative is to be compared. When the version information of the disk firmware matches the version information of the NAND flash 13, the firmware version of the disk is “S”. When the version information and the firmware version information of the NAND flash 13 are high, “E” is set. When the version information of the disk firmware is high, “D” is set. However, in this embodiment, the description of the correspondence when the version information of the firmware of the disk matches the version information of the firmware of the NAND flash 13 is omitted.

  The leftmost combination (combination 1) shown in FIG. 4 is 1) one or more disks, 2) does not have an encro-compatible Fw, 3) is a single system ID, and 4) NAND for Fw match The flash 13 is in a high state, and 5) the representative Fw is not damaged. It is assumed that the user has already used the network storage and has incorporated the existing hard disk drive 15 used in the network storage 10 into the new network storage 10 or a new hard disk drive 15 for the network storage 10. Is done.

  For this combination, “▼ format / ▼ FwUP” of Act2 is an option. If it is a single system ID, it can be formatted to implement a new RAID configuration, and maintaining the disk contents as a set of RAID configurations through FwUP processing is also an option. That is, the user is given not only the format selection but also the corresponding selection for maintaining the stored contents. This corresponds to a process of “holding the storage contents of the storage device when a predetermined condition is satisfied when performing control to unify the first version information corresponding to the selection”. Of course, the selection of “▼ format” corresponds to the process of “formatting the storage device in response to the selection”.

  Next, the second combination (union 2) from the left shown in FIG. 4 is: 1) one or more disks, 2) equipped with Encro-compatible Fw, 3) single system ID, and 4) Fw match Indicates that the NAND flash 13 is high. 5) The representative Fw is not damaged. It is assumed that the user has incorporated an existing hard disk drive 15 into a new network storage 10 or has newly installed an unused hard disk drive 15 for the network storage 10.

For this combination, “3 format / ▼ FwUP / ▼ FwV maintenance” of Act 3 is an option. When it is a single system ID, it is possible to format it to realize a new RAID configuration, and to maintain the disk contents as a set of RAID configurations by FwUP and Fw maintenance processing is one option. Become. Further, since the firmware version of the control program stored in the disk is a version supported by the network storage 10, it is possible to maintain the firmware version of the control program on the disk side. Therefore, as a user, one option is added.
If “▼ FwV maintenance” is selected, the NAND flash 13 is overwritten with the compressed control program stored in the disk. This is because when a disk fails, it is preferable to reconfigure the disk with a control program that actually configured the disk.

  As described above, in the combination of the disc states of the union 2, the user is given not only the format selection but also the corresponding selection for maintaining the stored contents. Further, the Fw maintenance process is a process of “holding the storage contents of the storage device when a predetermined condition is satisfied when performing control to unify the second version information of one storage device corresponding to the selection”. Equivalent to. “Unify to the second version information of one storage device” means that a representative is selected from a plurality of disks as shown in FIG. 3, and the firmware version of the representative disk is utilized. Represents that.

  Next, the second combination (combination 3) from the right shown in FIG. 4 is 1) one or more disks, 2) equipped with Encro-compatible Fw, 3) a single system ID, and 4) Fw match. Indicates that the disk is high. 5) The representative Fw is damaged. It is assumed that the user has incorporated an existing hard disk drive 15 into a new network storage 10 or has newly installed an unused hard disk drive 15 for the network storage 10.

The firmware version of the control program stored in the disk that is a single system ID is the version that this network storage 10 supports, so it is also possible to maintain the firmware version of the control program on the disk side. It is. However, the disk control program (Fw) selected as a representative is damaged. In such a case, the accuracy of the stored content at the present time cannot be guaranteed, and the accuracy of the future stored content when the operation is continued from that state cannot be guaranteed.
Therefore, only “▼ format” of Act4 is an option for this combination. For the user, the selection of the correspondence for maintaining the stored content is not given, but this is the best response in a situation where the accuracy of the stored content cannot be guaranteed.

  Next, the rightmost combination (combination 4) shown in FIG. 4 is 1) one or more disks, 2) provided with an enchrome-compatible Fw, 3) a plurality of system IDs, and 4) NAND for Fw matching. The flash 13 is in a high state, and 5) the representative Fw is not damaged. It is assumed that the user incorporates an existing hard disk drive 15 into a new network storage 10 or adds a new unused hard disk drive 15 in addition to these. The biggest difference is that 3) there are multiple system IDs.

For this combination, “3 format / ▼ FwUP / ▼ FwV maintenance” of Act 3 is an option. Although it has a plurality of system IDs, the disk on which the stored contents are to be retained is selected as a representative, so that the RAID configuration of that system ID is maintained by FwUP and Fw maintenance processing, and a set of RAID configurations Maintaining the contents of the disc is one option. Further, since the firmware version of the control program stored in the disk is a version supported by the network storage 10, it is possible to maintain the firmware version of the control program on the disk side. Therefore, as a user, one option is added.
If “▼ FwV maintenance” is selected, the NAND flash 13 is overwritten with the compressed control program stored in the representative RAID-configured disk, and the firmware of the non-representative disk is represented. It is better to unify the disk firmware.

  As described above, even in the combination of the disc states of the combination 4, the user is given not only the format selection but also the corresponding selection for maintaining the stored contents. In the case of this Fw maintenance, “when performing control to unify the second version information of one storage device corresponding to the selection, the stored contents of other storage devices are retained when a predetermined condition is satisfied”. It corresponds to processing. Further, although the system IDs of the disk 2 and the disk 3 are the same, the disk 1 having a system ID different from the system ID is selected as a representative. It corresponds to “display system ID”, and it can be said that determining the representative of the disk and processing it corresponds to “waiting for the selection of the system ID and performing control corresponding to the selection”.

By the way, as a method of using the network storage 10, firmware different from the NAND flash 13 and disk firmware may be employed.
As a modification of the present invention, a method of rewriting the firmware of the NAND flash 13 or the disk by supplying firmware from an external flash memory or the like via the USB connectors 17a and 17b in such a case will be described.

FIG. 5 is a flowchart corresponding to a method of supplying the latest firmware and rewriting the firmware of the internal memory or HDD.
In step S300, the control unit 11 checks whether a memory card is inserted in the USB connectors 17a and 17b, and in step S302, determines whether firmware is stored in the memory card. When the firmware is stored, the user may wish to update the firmware as described above. Therefore, the control unit 11 confirms the version of the control program (firmware) stored in each HDD (hard disk drive 15) in step S304, and in step S306, the memory card firmware and the HDD Compare firmware versions.

  In step S310, as in the case of Act3, an option “▼ Format / ▼ FwUP / ▼ FwV maintenance” is provided. Providing options and accepting selections are realized by browsing with the above-described web server and browser.

In step S312, processing corresponding to the user's selection is performed. Here, when “▼ FwUP” is selected, the firmware version of the internal memory and HDD firmware are overwritten with the firmware of the memory card. Since the firmware of the memory card is supplied in a compressed state, the NAND flash 13 as the internal memory is overwritten as it is, and each HDD (hard disk drive 15) is overwritten with the compressed state and expanded from the compressed state. Then, the control program for execution in each HDD is overwritten.
“▼ Format / ▼ FwV maintenance” is the same as in Act3 described above.

  Conventionally, in the enclosure of the network storage 10, when the HDD is replaced or newly installed, the firmware version incorporated in the enclosure must match the firmware version written in the HDD in order to operate normally. In other words, the HDD is formatted when it is compulsorily unified to a predetermined version or when the operating condition is not satisfied.

In this case, since it is not the correspondence which tries to hold | maintain the memory content of HDD as much as possible, the memory content of HDD had to be backed up beforehand and was troublesome.
However, according to the present invention, the firmware version of the NAND flash 13 which is the internal memory and the firmware version of the hard disk drive 15 which is one or a plurality of storage devices are compared, and then the storage device such as the hard disk drive 15 is used. It is confirmed by referring to the decision table whether or not the condition for maintaining the stored content is satisfied, and if the condition is satisfied, the stored content can be maintained.

Needless to say, the present invention is not limited to the above embodiments. It goes without saying for those skilled in the art,
-Applying the combination of the mutually replaceable members and configurations disclosed in the above-described embodiments as appropriate-The above-described embodiments are not disclosed in the above-described embodiments, but are publicly known techniques. The members and structures that can be mutually replaced with the members and structures disclosed in the above are appropriately replaced, and the combination is changed and applied. It is an embodiment of the present invention that a person skilled in the art appropriately replaces the members and configurations that can be assumed as substitutes for the members and configurations disclosed in the above-described embodiments, and changes the combination to apply. It is disclosed as.

DESCRIPTION OF SYMBOLS 10 ... Network storage, 11 ... Control part, 12 ... RAM (DDR3), 13 ... NAND flash, 14a, 14b ... HDD connector, 15 ... HDD (hard disk drive), 17a, 17b ... USB connector, 18 ... Network interface, 21 ... HDD storage space.

Claims (8)

An internal memory for storing the first control program; a connection unit for connecting one or more storage devices for storing the second control program; and a storage unit connected to the internal memory and the connection unit for storing the storage device. A storage control device comprising a control unit to control,
The controller is
At a predetermined timing, the version information of the first control program is read as first version information, the version information of the second control program is read as second version information,
A storage control device that determines whether the read first version information matches the second version information.   The storage control device according to claim 1, wherein the control unit displays the read first version information and the second version information, waits for selection, and performs control corresponding to the selection. .   The storage control apparatus according to claim 2, wherein the control unit performs control to unify version information corresponding to selection.   4. The control unit according to claim 3, wherein the control unit retains the storage content of the storage device when a predetermined condition is satisfied when performing control to unify the first version information corresponding to the selection. The storage control device described.   The control unit retains the storage contents of another storage device when a predetermined condition is satisfied when performing control to unify the second version information of the one storage device corresponding to the selection. The storage control device according to claim 3.   6. The control unit according to claim 5, wherein the control unit displays the system ID when a different system ID is read in the storage device, waits for selection of the system ID, and performs control corresponding to the selection. Storage controller.   The storage control device according to claim 2, wherein the control unit formats the storage device in response to selection. An internal memory for storing the first control program; a connection unit for connecting one or more storage devices for storing the second control program; and a storage unit connected to the internal memory and the connection unit for storing the storage device. A storage control method of a storage control device comprising a control unit to control,
Reading the version information of the first control program as first version information and reading the version information of the second control program as second version information at a predetermined timing;
A storage control method, comprising: performing a step of determining a match between the read first version information and the second version information.

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