Shared storage parity on RAID

Patent metadata

Field	Value
Publication number	US-10664367-B2
Application number	US-201715827926-A
Country	US
Kind code	B2
Filing date	Nov 30, 2017
Priority date	Nov 30, 2017
Publication date	May 26, 2020
Grant date	May 26, 2020

Abstract

A computer-implemented method, according to one embodiment, includes: determining that a data storage drive in a first array has failed, determining a location to rebuild the failed data storage drive, instructing performance of a rebuild operation at the determined location, determining one or more data storage drives in one or more arrays having a combined amount of available space that is sufficient to mirror data and/or parity information of the first array, instructing mirroring of the data and/or parity information of the first array in parallel with performing the rebuild operation, instructing deletion of the mirrored data and/or parity information of the first array from the one or more data storage drives in response to the rebuild operation being completed, and instructing reallocation of the space in the one or more data storage drives used to mirror the data and/or parity information of the first array as available space.

First claim

What is claimed is:

1. A computer-implemented method, comprising:
determining that a data storage drive in a first array has failed;
determining a location to rebuild the failed data storage drive;
instructing performance of a rebuild operation at the determined location;
determining one or more data storage drives in one or more arrays having a combined amount of available space that is sufficient to mirror data and/or parity information of the first array;
instructing mirroring of the data and/or parity information of the first array in parallel with performing the rebuild operation;
instructing deletion of the mirrored data and/or parity information of the first array from the one or more data storage drives in the one or more arrays in response to the rebuild operation being completed; and
instructing reallocation of the space in the one or more data storage drives in the one or more arrays used to mirror the data and/or parity information of the first array as available space.

2. The computer-implemented method of claim 1 , comprising:
in response to detecting a second data storage drive failure in the first array prior to the rebuild operation being completed:
instructing usage of the mirrored data and/or parity information from the one or more data storage drives in the one or more arrays to perform a remainder of the rebuild operation.

3. The computer-implemented method of claim 1 , wherein the location determined to perform the rebuild of the failed data storage drive is a data storage drive allocated as a spare data storage drive in the first array.

4. The computer-implemented method of claim 1 , comprising:
maintaining a record,
wherein the record includes an amount of available space in each of a plurality of arrays of data storage drives,
wherein determining the one or more data storage drives in the one or more arrays having a combined amount of available space to mirror the first array is based on the maintained record.

5. The computer-implemented method of claim 4 , wherein the record includes a health metric of each of the plurality of arrays of data storage drives and/or each of the data storage drives included in each of the plurality of arrays of data storage drives.

6. The computer-implemented method of claim 1 , wherein determining the one or more data storage drives in the one or more arrays having a combined amount of available space to mirror the first array is based on a current input/output operations-per-second value associated with each of the respective one or more arrays.

7. The computer-implemented method of claim 1 , comprising:
instructing resizing of the available space in the determined one or more data storage drives in the one or more arrays prior to mirroring the data and/or parity information of the first array.

8. The computer-implemented method of claim 1 , wherein at least one of the one or more arrays has a data storage limit associated therewith, wherein the data storage limit defines a minimum amount of available space in the respective array.

9. A computer program product comprising a computer readable storage medium having program instructions embodied therewith, wherein the computer readable storage medium is not a transitory signal per se, the program instructions readable by a processor, executable by the processor, or readable and executable by the processor to cause the processor to perform a method comprising:
determining, by the processor, that a data storage drive in a first array has failed;
determining, by the processor, a location to rebuild the failed data storage drive;
instructing, by the processor, performance of a rebuild operation at the determined location;
determining, by the processor, one or more data storage drives in one or more arrays having a combined amount of available space that is sufficient to mirror data and/or parity information of the first array;
instructing, by the processor, mirroring of the data and/or parity information of the first array in parallel with performing the rebuild operation;
instructing, by the processor, deletion of the mirrored data and/or parity information of the first array from the one or more data storage drives in the one or more arrays in response to the rebuild operation being completed; and
instructing, by the processor, reallocation of the space in the one or more data storage drives in the one or more arrays used to mirror the data and/or parity information of the first array as available space.

10. The computer program product of claim 9 , the program instructions readable by the processor, executable by the processor, or readable and executable by the processor to cause the processor to perform the method comprising:
in response to detecting a second data storage drive failure in the first array prior to the rebuild operation being completed:
instructing, by the processor, usage of the mirrored data and/or parity information from the one or more data storage drives in the one or more arrays to perform a remainder of the rebuild operation.

11. The computer program product of claim 9 , wherein the location determined to perform the rebuild of the failed data storage drive is a data storage drive allocated as a spare data storage drive in the first array.

12. The computer program product of claim 9 , the program instructions readable by the processor, executable by the processor, or readable and executable by the processor to cause the processor to perform the method comprising:
maintaining, by the processor, a record,
wherein the record includes an amount of available space in each of a plurality of arrays of data storage drives,
wherein determining the one or more data storage drives in the one or more arrays having a combined amount of available space to mirror the first array is based on the maintained record.

13. The computer program product of claim 12 , wherein the record includes a health metric of each of the plurality of arrays of data storage drives and/or each of the data storage drives included in each of the plurality of arrays of data storage drives.

14. The computer program product of claim 9 , wherein determining the one or more data storage drives in the one or more arrays having a combined amount of available space to mirror the first array is based on a current input/output operations-per-second value associated with each of the respective one or more arrays.

15. The computer program product of claim 9 , the program instructions readable by the processor, executable by the processor, or readable and executable by the processor to cause the processor to perform the method comprising:
instructing, by the processor, resizing of the available space in the determined one or more data storage drives in the one or more arrays prior to mirroring the data and/or parity information of the first array.

16. The computer program product of claim 9 , wherein at least one of the one or more arrays has a data storage limit associated therewith, wherein the data storage limit defines a minimum amount of available space in the respective array.

17. A system, comprising:
a hardware processor; and
logic integrated with the hardware processor, executable by the hardware processor, or integrated with and executable by the hardware processor, the logic being configured to:
determine, by the hardware processor, that a data storage drive in a first array has failed;
determine, by the hardware processor, a location to rebuild the failed data storage drive;
instruct, by the hardware processor, performance of a rebuild operation at the

Assignees

• IBM

Inventors

• Anna Gary
• Barajas Gonzalez Emmanuel
• Harrington Shaun E
• Mcgregor Harry R
• Moore Christopher B

Classifications

• G06F11/1092 Primary

  Rebuilding, e.g. when physically replacing a failing disk · CPC title

• G06F3/0689

  Disk arrays, e.g. RAID, JBOD · CPC title

• G06F11/3034

  where the computing system component is a storage system, e.g. DASD based or network based (digital input from or digital output to record carriers G06F3/06; digital recording or reproducing 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 title

• G06F11/2056 Primary

  by mirroring · CPC title