IP Library › Granted Patent US 10,025,666
Granted Patent B2
US 10,025,666 · App. 14/823,497 · Granted Jul 17, 2018

RAID surveyor

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Quick Facts
Patent No.
US 10,025,666
App. No.
14/823,497
Granted
Jul 17, 2018
Kind
B2
Abstract

A method for surveying a data storage subsystem for latent errors before a failing disk drive of the data storage subsystem fails and recovering unreadable data usable to reconstruct data of the failing disk drive. The method includes determining that a disk drive of a plurality of disk drives of the data storage subsystem meets a threshold for being identified as a failing disk drive, and prior to failure of the failing disk drive, surveying at least a portion of the data on the remaining plurality of disk drives to identify data storage areas with latent errors. The identified data storage areas may be reconstructed utilizing, at least in part, data stored on the failing disk drive.

Claims (45)

1. A method for surveying a data storage subsystem for latent errors before a failing storage device drive of the data storage subsystem fails and recovering unreadable data usable to reconstruct data of the failing storage device drive, the method comprising:

determining a storage device drive of the plurality of storage device drives meets a threshold for being identified as a failing drive; and

upon identifying the storage device drive as a failing drive and prior to failure of the failing drive:

identifying at least a portion of data storage areas of the remaining plurality of storage device drives having a redundant relationship to one or more data storage areas of the failing drive;

reading the identified data storage areas having a redundant relationship to one or more storage areas of the failing drive to identify a data storage area thereof with a latent error; and

write-correcting the data storage area identified as having a latent error utilizing, at least in part, data stored on the failing drive.

2. The method of claim 1 , wherein identifying at least a portion of data storage areas of the remaining plurality of storage device drives comprises identifying RAID extents on the failing drive.

3. The method of claim 2 , wherein identifying at least a portion of data storage areas of the remaining plurality of storage device having a redundant relationship to one or more data storage areas of the failing drive further comprises identifying data storage areas of the remaining plurality of storage device drives in RAID stripes corresponding to RAID extents identified on the failing drive.

4. The method of claim 3 , wherein identifying at least a portion of data storage areas of the remaining plurality of storage device drives having a redundant relationship to one or more data storage areas of the failing drive is initiated automatically upon identification of a failing drive.

5. The method of claim 4 , wherein determining a storage device drive of the plurality of storage device drives meets a threshold for being identified as a failing drive is performed automatically.

6. The method of claim 3 , wherein identifying at least a portion of data storage areas of the remaining plurality of storage device drives having a redundant relationship to one or more data storage areas of the failing drive is initiated at user request.

7. The method of claim 3 , wherein determining a storage device drive of the plurality of storage device drives meets a threshold for being identified as a failing drive is based on information relating to at least one of the storage device drive and usage of the storage device drive.

8. The method of claim 3 , wherein determining a storage device drive of the plurality of storage device drives meets a threshold for being identified as a failing drive comprises:

tracking errors of the storage device drive according to a predetermined standard; and

identifying the storage device drive as failing when the number of tracked errors meets a threshold number of errors.

9. The method of claim 3 , further comprising rereading the write-corrected data storage area to confirm successful correction of the latent error.

10. The method of claim 1 , wherein determining a storage device drive of the plurality of storage device drives meets a threshold for being identified as a failing drive comprises:

tracking errors of the storage device drive according to a predetermined standard; and

identifying the storage device drive as failing when the number of tracked errors meets a threshold number of errors.

11. The method of claim 1 , further comprising removing the failing drive and replacing it with a replacement storage device drive.

12. The method of claim 11 , further comprising rebuilding the data of the failing drive on the replacement storage device drive utilizing data from the remaining plurality of storage device drives.

13. An information handling system comprising:

a data storage subsystem providing storage abstractions of a plurality of storage device drives; and

a device controller with access to the data storage subsystem that:

determines a storage device drive of the plurality of storage device drives meets a threshold for being identified as a failing drive; and

upon identifying the storage device drive as a failing drive and prior to failure of the failing drive:

identifies at least a portion of data storage areas of the remaining plurality of storage device drives having a redundant relationship to one or more data storage areas on the failing drive;

reads the identified data storage areas having a redundant relationship to one or more storage areas of the failing drive to identify a data storage area thereof with a latent error; and

write-corrects the data storage area identified as having a latent error utilizing, at least in part, data stored on the failing drive.

14. The system of claim 13 , wherein the device controller identifies at least a portion of data storage areas of the remaining plurality of storage device drives having a redundant relationship to one or more data storage areas on the failing drive by:

identifying RAID extents on the failing drive;

identifying data storage areas on the remaining plurality of storage device drives in RAID stripes corresponding to RAID extents identified on the failing drive.

15. The system of claim 13 , wherein the device controller determines a storage device drive of the plurality of storage device drives meets a threshold for being identified as a failing drive based on information relating to at least one of the storage device drive and usage of the storage device drive.

16. The system of claim 15 , wherein information relating to usage of the storage device drive comprises errors of the storage device drive tracked according to a predetermined standard.

17. A method for surveying a data storage subsystem for latent errors before a failing storage device drive of the data storage subsystem fails and recovering unreadable data usable to reconstruct data of the failing storage device drive, the method comprising:

automatically tracking errors of a plurality of storage device drives of the data storage subsystem according to a predetermined standard and identifying a storage device drive as a failing drive when tracked errors for the storage device drive satisfy a predetermined threshold; and

upon identifying the storage device drive as a failing drive and prior to complete failure of the failing drive:

identifying data storage areas on the remaining plurality of storage device drives in at least a portion of RAID stripes corresponding to RAID extents on the failing drive;

reading the identified data storage areas for latent errors; and

write-correcting the data storage area identified as having a latent error utilizing, at least in part, data stored on the failing drive.

18. The method of claim 17 , further comprising removing the failing drive and replacing it with a replacement storage device drive.

19. The method of claim 17 , further comprising rereading the write-corrected data storage area to confirm successful correction of the latent error.

20. The method of claim 17 , further comprising:

removing the failing drive and replacing it with a replacement storage device drive; and

rebuilding the data of the failing drive on the replacement storage device drive utilizing data from the remaining plurality of storage device drives.

Assignments (16)
RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (053546/0001) Recorded Jun 23, 2022
From: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
To: DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.); DELL INTERNATIONAL L.L.C.; DELL PRODUCTS L.P.; DELL USA L.P.; EMC CORPORATION; DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.); EMC IP HOLDING COMPANY LLC
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RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (045455/0001) Recorded May 20, 2022
From: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
To: DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO ASAP SOFTWARE EXPRESS, INC.); DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.); DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL PRODUCTS L.P.; DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.); EMC CORPORATION (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MAGINATICS LLC); EMC IP HOLDING COMPANY LLC (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MOZY, INC.); SCALEIO LLC
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RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (040136/0001) Recorded Apr 26, 2022
From: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
To: DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO ASAP SOFTWARE EXPRESS, INC.); DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.); DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL PRODUCTS L.P.; DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.); EMC CORPORATION (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MAGINATICS LLC); EMC IP HOLDING COMPANY LLC (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MOZY, INC.); SCALEIO LLC
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RELEASE OF SECURITY INTEREST Recorded Nov 3, 2021
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH
To: ASAP SOFTWARE EXPRESS, INC.; AVENTAIL LLC; CREDANT TECHNOLOGIES, INC.; DELL USA L.P.; DELL INTERNATIONAL, L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL SYSTEMS CORPORATION; EMC CORPORATION; EMC IP HOLDING COMPANY LLC; FORCE10 NETWORKS, INC.; MAGINATICS LLC; MOZY, INC.; SCALEIO LLC; WYSE TECHNOLOGY L.L.C.
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SECURITY AGREEMENT Recorded Apr 22, 2020
From: CREDANT TECHNOLOGIES INC.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL USA L.P.; EMC CORPORATION; FORCE10 NETWORKS, INC.; WYSE TECHNOLOGY L.L.C.; EMC IP HOLDING COMPANY LLC
To: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.
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SECURITY AGREEMENT Recorded Mar 21, 2019
From: CREDANT TECHNOLOGIES, INC.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL USA L.P.; EMC CORPORATION; FORCE10 NETWORKS, INC.; WYSE TECHNOLOGY L.L.C.; EMC IP HOLDING COMPANY LLC
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SECURITY AGREEMENT Recorded Sep 21, 2016
From: ASAP SOFTWARE EXPRESS, INC.; AVENTAIL LLC; CREDANT TECHNOLOGIES, INC.; DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL SYSTEMS CORPORATION; EMC CORPORATION; EMC IP HOLDING COMPANY LLC; FORCE10 NETWORKS, INC.; MAGINATICS LLC; MOZY, INC.; SCALEIO LLC; SPANNING CLOUD APPS LLC; WYSE TECHNOLOGY L.L.C.
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
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SECURITY AGREEMENT Recorded Sep 21, 2016
From: ASAP SOFTWARE EXPRESS, INC.; AVENTAIL LLC; CREDANT TECHNOLOGIES, INC.; DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL SYSTEMS CORPORATION; EMC CORPORATION; EMC IP HOLDING COMPANY LLC; FORCE10 NETWORKS, INC.; MAGINATICS LLC; MOZY, INC.; SCALEIO LLC; SPANNING CLOUD APPS LLC; WYSE TECHNOLOGY L.L.C.
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