Anomaly notification control in disk array

• US 7,457,981 B2
• Filed: 07/21/2006
• Issued: 11/25/2008
• Est. Priority Date: 02/04/2004
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Morita, Seiki
• Primary Examiner(s): Lohn; Joshua A
• Application Number:
  US11/490,100
• Publication Number:
  US 20060255409A1
• Time in Patent Office: 858 Days
• Field of Search: 714/6, 714/7, 719/325
• US Class Current: 714/6.2
• CPC Class Codes: G06F 11/0727 in a storage system, e.g. in a DASD or network based storage system drivers for digital recording or reproducing units G06F3/06; circuits for error detection or correction within digital recording or reproducing units G11B20/18; for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS], H04L67/1097
• CPC Class Codes: G06F 11/076 by exceeding a count or rate limit, e.g. word- or bit count limit
• CPC Class Codes: G06F 11/2094 Redundant storage or storage space G06F11/2056 takes precedence

Abstract

In a storage device incorporating a plurality of kinds of disk drives with different interfaces, the controller performs sparing on a disk drive, whose errors that occur during accesses exceed a predetermined number, by swapping it with a spare disk drive that is prepared beforehand.

Claims

1. A disk array system comprising:

a controller, adapted to be coupled to a host computer, and controlling receiving/transferring data from/to said host computer and controlling reading/writing data;

a plurality of first disk drives, coupled to said controller, and being related to a first RAID group and storing data in accordance with controlling by said controller and each comprising a Serial ATA (SATA) interface;

a plurality of second disk drives, coupled to said controller, and being related to a second RAID group and storing data in accordance with controlling by said controller and each comprising a Fibre Channel (FC) interface; and

at least one third disk drive, coupled to said controller, and comprising an FC interface,

wherein, if said controller performs sparing of at least one of said first disk drives related to said first RAID group to said third disk drive as a spare disk drive, said controller relates said third disk drive to said first RAID group even though an interface type of said first disk drives is different from an interface type of said third disk drive so that said third disk drive and said first disk drives other than said at least one of said first disk drives are used to store at least data received from said host computer.

2. A disk array system according to claim 1, wherein:

said controller performs sparing of said at least one of said first disk drives based on error information of said at least one of said first disk drives.

3. A disk array system according to claim 1, wherein:

said controller performs sparing of said at least one of said first disk drives based on whether the number of errors is over a predetermined level, at least one of said errors occurring at a timing that said controller controls reading/writing data from/to said at least one of said first disk drives.

4. A disk array system according to claim 1, wherein:

said controller stores information of a disk type of each of said first disk drives, said second disk drives and said third disk drive.

5. A disk array system according to claim 1, wherein:

said controller stores information indicating that said third disk drive is said spare disk drive.

6. A disk array system according to claim 1, wherein:

said controller stores first information indicating that said third disk drive is said spare disk drive and second information indicating that a drive type of said third disk drive is an FC drive.

7. A disk array system according to claim 1, wherein:

said controller performs sparing to said third disk drive, if said controller identifies that a failure is impending for said at least one of said first disk drives.

8. A disk array system according to claim 1, wherein:

said first disk drives are related to said first RAID group before said controller performs sparing to said third disk drive; and

said third disk drive and said first disk drives are related to said first RAID group, if said controller performs sparing to said third disk drive.

9. A disk array system according to claim 1, wherein:

said controller controls said first RAID group related to said first disk drives before said at least one of said first disk drives fails; and

said first RAID group is related to said third disk drive, if said at least one of said first disk drives fails.

10. A disk array system according to claim 1, wherein:

at least one new first disk drive and said first disk drives other than said at least one of said first disk drives are related to said first RAID group, if said at least one of said first disk drives is replaced with said at least one new first disk drive.

11. A disk array system according to claim 1, wherein:

said controller controls said first RAID group related to said first disk drives before said at least one of said first disk drives has a status related to a failure;

said controller relates said third disk drive to said first RAID group, if said at least one of said first disk drives has said status related to said failure; and

at least one new first disk drive and said first disk drives other than said at least one of said first disk drives are related to said first RAID group, if said at least one of said first disk drives is replaced with said at least one new first disk drive.

12. A disk array system according to claim 1, wherein:

said controller automatically performs sparing of said at least one of said first disk drives to said third disk drive while said disk array system operates.

13. A disk array system according to claim 1, further comprising:

at least one fourth disk drive coupled to said controller and comprising a SATA interface;

wherein said controller is able to perform sparing of said at least one of said first disk drives to said fourth disk drive as a spare disk drive.

14. A disk array system comprising:

a controller, adapted to be coupled to a host computer, and receiving/transferring data from/to said host computer;

a plurality of first disk drives, coupled to said controller, and being adapted to be used to form a first RAID group and storing data by controlling performed by said controller and each comprising a Serial ATA (SATA) interface;

a plurality of second disk drives, coupled to said controller, and being adapted to be used to form a second RAID group and storing data by controlling performed by said controller and each comprising a Fibre Channel (FC) interface;

at least one third disk drive, coupled to said controller, and comprising an FC interface; and

at least one fourth disk drive, coupled to said controller, and comprising an FC interface,

wherein said controller is able to perform storing of data, corresponding to data stored in at least one of said first disk drives, in said third disk drive although it is desired that a RAID group is made up of a plurality of disk drives each comprising the same kind of interface, said third disk drive being a first spare disk drive for said at least one of said first disk drives so that said third disk drive and said first disk drives other than said at least one of said first disk drives are used as a same RAID group, and

wherein said controller is able to perform storing of data, corresponding to data stored in at least one of said second disk drives, in said fourth disk drive, said fourth disk drive being a second spare disk drive for at least one of said second disk drives so that said fourth disk drive and said second disk drives other than said at least one of said second disk drives are used as a same RAID group.

15. A disk array system according to claim 14, wherein:

said controller performs storing of data, corresponding to data stored in said at least one of said first disk drives, in said third disk drive based on error information of said at least one of said first disk drives.

16. A disk array system according to claim 14, wherein:

said controller stores data, corresponding to data stored in said at least one of said first disk drives, in said third disk drive based on whether the number of errors is over a predetermined level, at least one of said errors occurring at a timing that said controller reads/writes data from/to said at least one of said first disk drives.

17. A disk array system according to claim 14, wherein:

said controller stores information of a disk type of each of said first disk drives, said second disk drives and said third disk drive.

18. A disk array system according to claim 14, wherein:

said controller stores information indicating that said third disk drive is said first spare disk drive.

19. A disk array system according to claim 14, wherein:

said controller stores first information indicating that said third disk drive is said first spare disk drive and second information indicating that a drive type of said third disk drive is an FC disk drive.

20. A disk array system according to claim 14, wherein:

said controller performs storing of data, corresponding to data stored in said at least one of said first disk drives, in said third disk drive, if said at least one of said first disk drives indicates a sign of an impending failure.

21. A disk array system according to claim 14, wherein:

said first disk drives are adapted to be used to form said first RAID group before performing storing of data, corresponding to data stored in said at least one of said first disk drives, in said third disk drive; and

said third disk drive is related to said first RAID group, if said data, corresponding to data stored in said at least one of said first disk drives, are stored in said third disk drive.

22. A disk array system according to claim 14, wherein:

said controller controls said first RAID group by using said first disk drives before said at least one of said first disk drives indicates a sign of an impending failure; and

said controller relates said third disk drive to said first RAID group, if said at least one of said first disk drives indicates a sign of implementing a failure.

23. A disk array system according to claim 14, wherein:

said at least one of said first disk drives and the other of said first disk drives are adapted to be used to form said first RAID group before performing storing of data, corresponding to data stored in said at least one of said first disk drives, in said third disk drive;

said third disk drive is related to said first RAID group, if said data, corresponding to data stored in said at least one of said first disk drives, are stored in said third disk drive; and

at least one new first disk drive and the other of said first disk drives are adapted to be used to form said first RAID group, if said at least one of said first disk drives is replaced with said at least one new first disk drive.

24. A disk array system according to claim 14, wherein:

said controller controls said first RAID group by using said at least one of said first disk drives and the other of said first disk drives before said at least one of said first disk drives has a status of a failure;

said controller relates said third disk drive to said first RAID group, if said at least one of said first disk drives has said status of said failure; and

said controller controls said first RAID group by using at least one new first disk drive and the other of said first disk drives, if said at least one of said first disk drives is replaced with said at least one new first disk drive.

25. A disk array system according to claim 14, wherein:

said controller automatically performs storing of data, corresponding to data stored in said at least one of said first disk drives, in said third disk drive during operation of said disk array system.

26. A disk array system comprising:

a controller, adapted to be coupled to a host computer, and controlling receiving/transferring data from/to said host computer;

a plurality of first disk drives, coupled to said controller, and being related to a first RAID group and storing data by controlling performed by said controller and each comprising a Fibre Channel (FC) interface;

a plurality of second disk drives, coupled to said controller, and being related to a second RAID group and storing data by controlling performed by said controller and each comprising a Serial ATA (SATA) interface; and

at least one third disk drive, coupled to said controller, and being used as a spare disk drive and comprising a SATA interface,

wherein, if a disk drive having an FC interface is unavailable, said controller performs sparing of at least one of said first disk drives related to said first RAID group and is able to control use of said third disk drive as said spare disk drive for said at least one of said first disk drives even though an interface type of said first disk drives is different from an interface type of said third disk drive so that said third disk drive and said first disk drives other than said at least one of said first disk drives are used to store at least data received from said host computer.

27. A disk array system according to claim 26, wherein:

said controller performs sparing of said at least one of said first disk drives based on error information of said at least one of said first disk drives.

28. A disk array system according to claim 26, wherein:

said controller performs sparing of said at least one of said first disk drives based on whether the number of errors is over a predetermined level, at least one of said errors occurring at a timing that said controller controls reading/writing data from/to said at least one of said first disk drives.

29. A disk array system according to claim 26, wherein:

said controller stores information of a disk type of each of said first disk drives, said second disk drives and said third disk drive.

30. A disk array system according to claim 26, wherein:

said controller stores information indicating that said third disk drive is said spare disk drive.

31. A disk array system according to claim 26, wherein:

said controller stores first information indicating that said third disk drive is said spare disk drive and second information indicating that a drive type of said third disk drive is a SATA drive.

32. A disk array system according to claim 26, wherein:

said controller performs sparing to said third disk drive, if said at least one of said first disk drives relates to a failure.

33. A disk array system according to claim 26, wherein:

said first disk drives control said first disk drives of said first RAID group to be stored at least data received from said host computer before said at least one of said first disk drives fails; and

said third disk drive is related to said first RAID group, if said at least one of said first disk drives relates to a failure.

34. A disk array system according to claim 26, wherein:

said controller controls said first RAID group by using said first disk drives before performing sparing of said at least one of said first disk drives; and

said controller relates said third disk drive to said first RAID group, if said sparing of said at least one of said first disk drives is performed.

35. A disk array system according to claim 26, wherein:

said at least one of said first disk drives and the other of said first disk drives are adapted to be used to form said first RAID group before said at least one of said first disk drives fails;

said third disk drive is related to said first RAID group, if said at least one of said first disk drives fails; and

at least one new first disk drive and said the other of said first disk drives are adapted to be used to form said first RAID group, if said at least one of said first disk drives is replaced with said at least one new first disk drive.

36. A disk array system according to claim 26, wherein:

said controller controls said first RAID group by using said at least one of said first disk drives and the other of said first disk drives before said at least one of said first disk drives has a status of a failure;

said controller relates said third disk drive to said first RAID group, if said at least one of said first disk drives has said status of said failure; and

at least one new first disk drive and the other of said first disk drives are adapted to be used to form said first RAID group, if said at least one of said first disk drives is replaced with said at least one new first disk drive.

37. A disk array system according to claim 26, wherein:

said controller performs sparing of at least one of said first disk drives while said disk array system operates.

38. A disk array system according to claim 26, further comprising:

at least one fourth disk drive coupled to said controller and being used as said spare disk drive and comprising a SATA interface;

wherein said controller performs sparing of at least one of said second disk drives related to said second RAID group and is able to control use of said fourth disk drive as said spare disk drive for said at least one of said first disk drives.

39. A disk array system comprising:

a controller, being adapted to be coupled to a host computer, and controlling receiving/transferring data from/to said host computer;

a plurality of first disk drives, coupled to said controller and related to a RAID group, and storing data received from said host computer based on controlling by said controller and each comprising a Serial ATA (SATA) interface; and

at least one second disk drive, coupled to said controller, and being used as a spare disk drive and comprising a Fibre Channel (FC) interface;

wherein said controller performs sparing of at least one of said first disk drives and is able to control use of said second disk drive as said spare disk drive for said at least one of said first disk drives.

40. A disk array system comprising:

a controller being adapted to be coupled to a host computer;

a plurality of first disk drives, coupled to said controller and related to a first RAID group, and storing data by controlling performed by said controller and each comprising a Fibre Channel (FC) interface;

a plurality of second disk drives, coupled to said controller and related to a second RAID group, and storing data by controlling performed by said controller and each comprising a Serial ATA (SATA) interface; and

one or more third disk drives, coupled to said controller, and each comprising an FC interface,

wherein said third disk drives can be spare disk drives for one or more of said second disk drives even though an interface type of said third disk drives is different from an interface type of said second disk drives so that said third disk drive and said second disk drives other than said one or more of said second disk drives are used to store at least data received from said host computer.

41. A disk array system according to claim 40, wherein:

said third disk drives become said spare disk drives for one or more of said second disk drives based on error information of said second disk drives.

42. A disk array system according to claim 40, wherein:

said controller performs sparing to said third disk drives based on whether the number of errors is over a predetermined level, at least one of said errors occurring at a timing that said controller controls reading/writing data from/to one or more of said second disk drives.

43. A disk array system according to claim 40, wherein:

said controller stores information of a disk type of each of said first disk drives, said second disk drives and said third disk drive.

44. A disk array system according to claim 40, wherein:

said controller stores information indicating that said third disk drives are said spare disk drives.

45. A disk array system according to claim 40, wherein:

said controller stores first information indicating that said third disk drives are said spare disk drive and second information indicating that a drive type of said third disk drive is an FC drive.

46. A disk array system according to claim 40, wherein:

said third disk drives as said spare disk drives have stored therein data, if a failure is impending for said second disk drives.

47. A disk array system according to claim 40, wherein:

said second disk drives are related to said second RAID group before one or more of said second disk drives fails; and

said third disk drives are related to said second RAID group, if said one or more of said second disk drives fails.

48. A disk array system according to claim 40, wherein:

said controller controls said second RAID group by using said second disk drives before a failure impends to said one or more of said second disk drives; and

said controller relates said third disk drives to said second RAID group, if said failure impends to said one or more of said second disk drives.

49. A disk array system according to claim 40, wherein:

at least one of said second disk drives and the other of said second disk drives are adapted to be used to form said second RAID group before said one or more of said second disk drives is related to a failure;

said third disk drive is related to said second RAID group, if said one or more of said second disk drives is related to said failure; and

at least one new second disk drive and said the other of said second disk drives are adapted to be used to form said second RAID group, if said at least one of said second disk drives is replaced with said at least one new second disk drive.

50. A disk array system according to claim 40, wherein:

said second RAID group is built by using one or more of said second disk drives and the other of said second disk drives before said one or more of said second disk drives become a status of a failure;

said second RAID group is rebuilt by using said third disk drive and the other of said second disk drives, if said one or more of said second disk drives become said status of said failure; and

said second RAID group is rebuilt by using one or more new second disk drives and the other of said second disk drives, if said one or more second of said disk drives are replaced with said one or more new second disk drives.

51. A disk array system according to claim 40, wherein:

said controller automatically performs sparing to said third disk drives while said disk array system operates.

52. A disk array system according to claim 40, further comprising:

one or more fourth disk drives, coupled to said controller, and each comprising a SATA interface;

wherein said fourth disk drives can be spare disk drives for said first disk drives.

53. A disk array system according to claim 40, further comprising:

wherein said third disk drives can be spare disk drives for said first disk drives.

54. A disk array system comprising:

a controller, being adapted to be coupled to a host computer, and controlling receiving/transferring data from/to said host computer;

a plurality of first disk drives, coupled to said controller and being related to a RAID group, and storing data received from said host computer by controlling performed by said controller and each comprising a Serial ATA (SATA) interface; and

at least one second disk drive, coupled to said controller, and each comprising a Fibre Channel (FC) interface;

wherein said controller performs sparing of at least one of said first disk drives related to said RAID group to said second disk drive so that said second disk drive and said first disk drives other than said at least one of said first disk drives are used to store at least data received from said host computer.

55. A disk array system comprising:

a controller being adapted to be coupled to a plurality of host computers;

a plurality of first disk drives, coupled to said controller and related to a first RAID group, and storing data received from a first host computer of said host computers in accordance with controlling by said controller and each comprising a Fibre Channel (FC) interface;

a plurality of second disk drives, coupled to said controller and related to a second RAID group, and storing data received from a second host computer of said host computers in accordance with controlling by said controller and each comprising a Serial ATA (SATA) interface; and

one or more third disk drives, coupled to said controller, and each comprising an FC interface,

wherein said third disk drives can be spare disk drives for one or more of said first disk drives related to said first RAID group so that said third disk drive and said first disk drives other than said one or more of said first disk drives are used to store at least data received from said first host computer, and

wherein said third disk drives can be spare disk drives for one or more of said second disk drives so that said third disk drive and said second disk drives other than said one or more of said second disk drives are used to store at least data received from said second host computer.

56. A disk array system comprising:

a controller being adapted to be coupled to a host computer;

a plurality of first disk drives, coupled to said controller and related to a first RAID group, and storing data in accordance with controlling by said controller and each comprising a Fibre Channel (FC) interface;

a plurality of second disk drives, coupled to said controller and related to a second RAID group, and storing data in accordance with controlling by said controller and each comprising a Serial ATA (SATA) interface; and

at least one third disk drive, coupled to said controller, and each comprising an FC interface,

wherein said controller is able to make said third disk drive to be a spare disk drive for at least one of said first disk drives related to said first RAID group so that said third disk drive and said first disk drives other than said at least one of said first disk drives are used to store data, and

wherein said controller is able to make said third disk drive to be a spare disk drive for at least one of said second disk drives related to said second RAID group so that said third disk drive and said second disk drives other than said at least one of said second disk drives are used to store data.

57. A disk array system comprising:

a controller, being adapted to be coupled to a plurality of host computers, and receiving/transferring data from/to said host computers;

a plurality of first disk drives, coupled to said controller and related to a first RAID group, and storing data received from a first host computer of said host computers in accordance with controlling by said controller and each comprising a Fibre Channel (FC) interface;

a plurality of second disk drives, coupled to said controller and related to a second RAID group, and storing data received from a second host computer of said host computers in accordance with controlling by said controller and each comprising a Serial ATA (SATA) interface; and

one or more third disk drives, coupled to said controller, and each comprising a SATA interface,

wherein said third disk drives can be spare disk drives for one or more of said first disk drives related to said first RAID group so that said third disk drive and said first disk drives other than said one or more of said first disk drives are used to store data received from said first host computer, and

wherein said third disk drives can be spare disk drives for one or more of said second disk drives related to said second RAID group so that said third disk drive and said second disk drives other than said one or more of said second disk drives are used to store at least data received from said second host computer.

58. A disk array system comprising:

a controller, being adapted to be coupled to a plurality of host computers, and receiving/transferring data from/to said host computers;

a plurality of first disk drives, coupled to said controller and related to a first RAID group, and storing data received from a first host computer of said host computers in accordance with controlling by said controller and each comprising a Fibre Channel (FC) interface;

a plurality of second disk drives, coupled to said controller and related to a second RAID group, and storing data received from a second host computer of said host computers in accordance with controlling by said controller and each comprising a Serial ATA (SATA) interface; and

at least one third disk drive, coupled to said controller, and each comprising a SATA interface,

wherein said controller is able to make said third disk drive to be spare disk drive for at least one of said first disk drives related to said first RAID group so that said third disk drive and said first disk drives other than said at least one of said first disk drives are used to store at least data received from said first host computer, and

wherein said controller is able to make said third disk drive to be spare disk drive for at least one of said second disk drives related to said second RAID group so that said third disk drive and said second disk drives other than said at least one of said second disk drives are used to store at least data received from said second host computer.

59. A disk array system comprising:

a controller, being adapted to be coupled to a host computer, and receiving/transferring data from/to said host computer;

a plurality of first disk drives, coupled to said controller and related to a RAID group, and storing data received from said host computer in accordance with controlling by said controller and each comprising a Serial ATA (SATA) interface; and

one or more second disk drives, coupled to said controller, and each comprising a Fibre Channel (FC) interface,

wherein said second disk drives can be spare disk drives for one or more of said first disk drives related to said RAID group, although it is desired that a RAID group is made up of a plurality of disk drives each comprising the same kind of interface, so that said second disk drives and said first disk drives other than said one or more of said first disk drives are used to store at least data received from said host computer.