METHODS FOR HANDLING STORAGE ELEMENT FAILURES TO REDUCE STORAGE DEVICE FAILURE RATES AND DEVICES THEREOF

• US 20180341554A1
• Filed: 05/26/2017
• Published: 11/29/2018
• Est. Priority Date: 05/26/2017
• Status: Active Grant

• Current Assignee: NetApp, Inc.
• Original Assignee: NetApp, Inc.
• Inventors: Emami, Tim K., Binford, Charles, Gupta, Ratnesh
• Granted Patent: US 10,915,405 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 11/0751 Error or fault detection not based on redundancy power supply failures G06F1/30; network fault management H04L41/06
• CPC Class Codes: G06F 11/0766 Error or fault reporting or storing
• CPC Class Codes: G06F 11/108 Parity data distribution in semiconductor storages, e.g. in SSD
• CPC Class Codes: G06F 11/1092 Rebuilding, e.g. when physically replacing a failing disk
• CPC Class Codes: G06F 11/14 Error detection or correction of the data by redundancy in operation G06F11/16 takes precedence
• CPC Class Codes: G06F 11/1446 Point-in-time backing up or restoration of persistent data
• CPC Class Codes: G06F 11/16 Error detection or correction of the data by redundancy in hardware
• CPC Class Codes: G06F 11/1666 where the redundant component is memory or memory area
• CPC Class Codes: G06F 11/2094 Redundant storage or storage space G06F11/2056 takes precedence
• CPC Class Codes: G06F 11/3034 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 Class Codes: G06F 11/3055 Monitoring arrangements for monitoring the status of the computing system or of the computing system component, e.g. monitoring if the computing system is on, off, available, not available error or fault processing without redundancy G06F11/0703; error detection or correction by redundancy in data representation G06F11/08; error detection or correction by redundancy in operation G06F11/14; error detection or correction by redundancy in hardware G06F11/16

Abstract

Methods, non-transitory computer readable media, and computing devices that determine when a storage element of a data storage device has failed. Address(es) mapped to the failed storage element are identified, when the determining indicates that the storage element has failed. Data corresponding to the address(es) is regenerated according to a data loss protection and recovery scheme (e.g., a RAID scheme). The regenerated data is written to other storage element(s) of the data storage device in order to remap the address(es) to the other storage element(s). This technology allows a data storage device (e.g., an SSD) to be repaired in-place following a failure of storage element(s) (e.g., a die) of the data storage device. Advantageously, entire data storage devices do not have to be failed with this technology as a result of a failure of an individual storage element, thereby reducing data storage device failure rates and associated overhead.

Claims

1. A method, comprising:

regenerating, by a computing device, data corresponding to one or more addresses mapped to a failed storage element of a data storage device according to a data loss protection and recovery scheme; and

writing, by the computing device, the regenerated data to one or more operational storage elements of the data storage device in order to remap the addresses to the operational storage elements.

2. The method of claim 1, wherein the data storage device utilizes block-based storage and the method further comprises receiving, by the computing device, one or more results from the data storage device in response to one or more requests to scan one or more ranges of logical block addresses, in order to identify the addresses mapped to the failed storage element.

3. The method of claim 1, further comprising determining, by the computing device, that the storage element has failed based on a failure prediction message received from the data storage device.

4. The method of claim 1, further comprising determining, by the computing device, that the storage element has failed based on an error code received in response to a read storage operation issued to the data storage device, wherein one of the addresses is associated with the read storage operation.

5. The method of claim 1, further comprising servicing, by the computing device, one or more received storage operations using the data storage device in parallel with regenerating and writing the data.

6. The method of claim 1, wherein the data storage device comprises a solid state drive (SSD) and the storage element comprises a die of the SSD.

7. A non-transitory machine readable medium having stored thereon instructions for handling storage element failures to reduce storage device failure rates comprising machine executable code which when executed by at least one machine causes the machine to:

regenerate data corresponding to one or more addresses mapped to a failed storage element of a data storage device according to a data loss protection and recovery scheme; and

write the regenerated data to one or more operational storage elements of the data storage device in order to remap the addresses to the operational storage elements.

8. The non-transitory machine readable medium of claim 7, wherein the data storage device utilizes block-based storage and the machine executable code when executed by the machine further causes the machine to receive one or more results from the data storage device in response to one or more requests to scan one or more ranges of logical block addresses, in order to identify the addresses mapped to the failed storage element.

9. The non-transitory machine readable medium of claim 7, wherein the machine executable code when executed by the machine further causes the machine to determine that the storage element has failed based on a failure prediction message received from the data storage device.

10. The non-transitory machine readable medium of claim 7, wherein the machine executable code when executed by the machine further causes the machine to determine that the storage element has failed based on an error code received in response to a read storage operation issued to the data storage device, wherein one of the addresses is associated with the read storage operation.

11. The non-transitory machine readable medium of claim 7, wherein the machine executable code when executed by the machine further causes the machine to service one or more received storage operations using the data storage device in parallel with regenerating and writing the data.

12. The non-transitory machine readable medium of claim 7, wherein the data storage device comprises a solid state drive (SSD) and the storage element comprises a die of the SSD.

13. A computing device, comprising:

a memory containing machine readable medium comprising machine executable code having stored thereon instructions for handling storage element failures to reduce storage device failure rates; and

a processor coupled to the memory, the processor configured to execute the machine executable code to cause the processor to;

regenerate data corresponding to one or more addresses mapped to a failed storage element of a data storage device according to a data loss protection and recovery scheme; and

write the regenerated data to one or more operational storage elements of the data storage device in order to remap the addresses to the operational storage elements.

14. The computing device of claim 13, wherein the data storage device utilizes block-based storage and the processor is further configured to execute the machine executable code to further cause the processor to receive one or more results from the data storage device in response to one or more requests to scan one or more ranges of logical block addresses, in order to identify the addresses mapped to the failed storage element.

15. The computing device of claim 13, wherein the processor is further configured to execute the machine executable code to further cause the processor to determine that the storage element has failed based on a failure prediction message received from the data storage device.

16. The computing device of claim 13, wherein the processor is further configured to execute the machine executable code to further cause the processor to determine that the storage element has failed based on an error code received in response to a read storage operation issued to the data storage device, wherein one of the addresses is associated with the read storage operation.

17. The computing device of claim 13, wherein the processor is further configured to execute the machine executable code to further cause the processor to service one or more received storage operations using the data storage device in parallel with regenerating and writing the data.

18. The computing device of claim 13, wherein the data storage device comprises a solid state drive (SSD) and the storage element comprises a die of the SSD.