Remote storage disk control device and method for controlling the same

• US 7,165,163 B2
• Filed: 03/22/2005
• Issued: 01/16/2007
• Est. Priority Date: 09/17/2003
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Suzuki, Toru, Kasako, Naohisa, Kondo, Shuji
• Primary Examiner(s): Peugh; Brian R.
• Application Number:
  US11/087,983
• Publication Number:
  US 20050166023A1
• Time in Patent Office: 665 Days
• Field of Search: None
• US Class Current: 711/202
• CPC Class Codes: G06F 11/2066 Optimisation of the communication load
• CPC Class Codes: G06F 11/2069 Management of state, configuration or failover
• CPC Class Codes: G06F 11/2071 using a plurality of controllers
• CPC Class Codes: G06F 11/2074 Asynchronous techniques
• CPC Class Codes: G06F 11/2082 Data synchronisation
• CPC Class Codes: G06F 11/2094 Redundant storage or storage space G06F11/2056 takes precedence
• CPC Class Codes: G06F 11/2097 maintaining the standby controller/processing unit updated initialisation or re-synchronisation thereof G06F11/1658 and subgroups
• CPC Class Codes: G06F 2201/855 Details of asynchronous mirroring using a journal to transfer not-yet-mirrored changes

Abstract

A storage device system includes an information processing device, a first storage device equipped with a first storage volume, and a second storage device equipped with a second storage volume. The information processing device and the first storage device are communicatively connected to one another. Also, the first storage device and the second storage device are communicatively connected to one another. The information processing device is equipped with a first write request section that requests to write data in the first storage device according to a first communications protocol, and a second write request section that requests to write data in the second storage device according to a second communications protocol. The information processing device creates first data including a first instruction to be executed in the second storage device.

Claims

1. A storage system, comprising:

a virtualization device coupled to an information processing device and having a first controller and at least one virtual volume;

said first controller receiving a data input request sent from said information processing device to said at least one virtual volume and changing a first Logical Unit Number (LUN) included in said data input request into a second LUN of at least one first logical volume in a storage device based on a relationship between said at least one virtual volume and said at least one first logical volume and relaying a changed data input request including said second LUN to said at least one first logical volume;

said storage device coupled to said- virtualization device and having a second controller and a plurality of disk drives, said disk drives being related to said at least one first logical volume; and

said second controller receiving said changed data input request including said second LUN from said virtualization device and storing data of said changed data input request including said second LUN in said disk drives;

wherein said first controller receives a pair control command sent from said information processing device to said at least one virtual volume and changes said first LUN included in said pair control command into said second LUN based on said relationship and relays a pair control command including said second LUN to said at least one first logical volume; and

wherein said second controller receives said pair control command including said second LUN from said virtualization device and controlling a pair status between said at least one first logical volume and a second logical volume in response to said pair control command including said second LUN.

2. The storage system according to claim 1, wherein:

said pair control command including said second LUN is used to change said pair status from a first status to a second status;

said first status is that said at least one first logical volume and said second logical volume do not form a pair in which one logical volume of said at least one first logical volume and said second logical volumes is set as a primary volume and another logical volume of said at least one first logical volume and said second logical volume is set as a secondary volume; and

said second status is that said at least one first logical volume and said second logical volume form said pair.

3. The storage system according to claim 1, wherein:

said pair control command including said second LUN is used to form a pair of said at least one first logical volume as being a primary volume and said second logical volume as being a secondary volume storing data which are corresponding to data stored in said primary volume.

4. The storage system according to claim 1, wherein:

said pair control command including said second LUN is used to form a pair of said second logical volume as being a primary volume and said at least one first logical volume as being a secondary volume stored data which are corresponding to data stored in said primary volume.

5. The storage system according to claim 1, wherein:

said pair control command including said second LUN is used to change said pair status to a status of copying data stored in said at least one first logical volume as a primary volume to said second logical volume as a secondary volume so that data stored in said at least one first logical volume are-conform to data stored in said second logical volume.

6. The storage system according to claim 1, wherein:

said pair control command including said second LUN is used to change said pair status to a status of copying data stored in said second logical volume as a primary volume to said at least one first logical volume as a secondary volume so that data stored in said second logical volume conform to data stored in said at least one first logical volume.

7. The storage system according to claim 1, wherein:

said pair control command including said second LUN is used to change said pair status to a status of storing data needed to be stored in said at least one first logical volume as a primary volume in said second logical volume as a secondary volume, if said second controller receives said changed data input request including said second LUN.

8. The storage system according to claim 1, wherein:

said pair control command including said second LUN is used to change said pair status to a status of storing data in relation to said second logical volume as a primary volume in said at least one first logical volume as a secondary volume, if said second controller receives another data input request.

9. The storage system according to claim 1, wherein:

said pair control command including said second LUN is used to change said pair status to a status of storing data sent from said information processing device in said at least one first logical volume as a primary volume and not to store data in relation to said at least one first logical volume in said second logical volume as a secondary volume.

10. The storage system according to claim 1, wherein:

said pair control command including said second LUN is used to change said pair status to a status of storing data sent from said information processing device in said second logical volume as a primary volume and not to store data in relation to said second logical volume in said at least one first logical volume as a secondary volume.

11. The storage system according to claim 1, wherein:

said pair control command including said second LUN is used to change said pair status to a status of restoring data from said at least one first logical volume as a primary volume to said second logical volume as a secondary volume.

12. The storage system according to claim 1, wherein:

said pair control command including said second LUN is used to change said pair status to a status of restoring data in relation to said at least one first logical volume in said second logical volume.

13. The storage system according to claim 1, wherein:

said first storage device has a third logical volume, said third logical volume is used to control said storage device by said information processing device.

14. The storage system according to claim 1, wherein:

said pair control command has information which is used to identify said at least one virtual volume from the other virtual volumes.

15. The storage system according to claim 1, wherein:

said first controller receives another pair control command and changes said first LUN included in said another pair control command into said second LUN based on said relationship and transfers another pair control command including said second LUN to said storage device; and

said second controller receives said another pair control command including said second LUN from said virtualization device and replying said pair status between said at least one first logical volume and said second logical volume to said virtualization device in response to said another pair control command including said second LUN.

16. The storage system according to claim 1, wherein:

said first controller has a map of said relationship in a memory and read said map in said memory on receiving said data input request and said pair control command.

17. The storage system according to claim 1, wherein:

said first and second LUN are based on Small Computer System Interface (SCSI) standards.

18. A storage system, comprising:

a virtualization device coupled to an information processing device and having at least one virtual volume;

a first controller, in said virtualization device, receiving a data input request, which has a first Logical Unit Number (LUN) and data and is sent from said information processing device to said at least one virtual volume, and changing said first LUN included in said data input request into a second LUN of at least one first logical volume based on a relationship between said at least one virtual volume and said at least one first logical volume and relaying said changed data input request to said first logical volume;

a storage device coupled to said virtualization device and having a plurality of disk drives, said disk drives being related to said first logical volume and a second logical volume; and

a second controller, in said storage device, receiving said changed data input request from said virtualization device and storing said data of said changed data input request in said disk drives;

wherein said first controller receives a pair control command, which has said first LUN and command information and is sent from said information processing device to said at least one virtual volume, and changes said first LUN included in said pair control command into said second LUN based on said relationship and relays said changed pair control command to said at least one first logical volume; and

wherein said second controller receives said changed pair control command from said virtualization device and replies a pair status between said at least one first logical volume and said second logical volume to said virtualization device in response to said changed pair control command.

19. A storage system, comprising:

a virtualization device coupled to an information processing device and having a first controller and at least one virtual volume;

said first controller receiving a data input request sent from said information processing device to said at least one virtual volume and changing a first Logical Unit Number (LUN) included in said data input request into a second LUN of at least one first logical volume in a storage device based on a relationship between said at least one virtual volume and said at least one first logical volume and relaying a changed data input request including said second LUN to said first logical volume and receiving a pair control command sent from said information processing device and relaying said pair control command to said storage device;

said storage device coupled to said virtualization device and having a second controller and a plurality of disk drives, said disk drives being related to said at least one first logical volume; and

said second controller receiving said changed data input request including said second LUN from said virtualization device and storing data of said changed data input request, including said second LUN, in said disk drives and receiving said pair control command from said virtualization device and controlling a pair status between said at least one first logical volume and a second logical volume in response to said pair control command.

20. The storage system according to claim 19, wherein:

said first controller has a map of said relationship in a memory and read said map in said memory on receiving said data input request.

21. The storage system according to claim 19, wherein:

said first and second LUN are based on Small Computer System Interface (SCSI) standards.

22. The storage system according to claim 19, wherein:

said pair control command is used to change said pair status from a first status to a second status;

said first status is that said at least one first logical volume and said second logical volume do not form a pair in which one logical volume of said at least one first logical volume and said second logical volumes is set as a primary volume and another logical volume of said at least one first logical volume and said second logical volume is set as a secondary volume; and

said second status is that said at least one first logical volume and said second logical volume form said pair.

23. The storage system according to claim 19, wherein:

said pair control command is used to change said pair status to a status of storing data needed to be stored in said at least one first logical volume as a primary volume in said second logical volume as a secondary volume, if said second controller receives said changed data input request.

24. The storage system according to claim 19, wherein:

said pair control command is used to change said pair status to a status of storing data sent from said information processing device in said at least one first logical volume as a primary volume and not to store data in relation to said at least one first logical volume in said second logical volume as a secondary volume.

25. The storage system according to claim 19, wherein:

said pair control command is used to change said pair status to a status of restoring data in relation to said at least one first logical volume in said second logical volume.

26. The storage system according to claim 19, wherein:

said first controller receives another pair control command and relays said changed another pair control command to said storage device; and

said second controller receives said another pair control command from said virtualization device and replying said pair status between said at least one first logical volume and said second logical volume to said virtualization device in response to said another pair control command.