Enhanced data protection in data storage drives

• US 10,372,356 B2
• Filed: 03/19/2018
• Issued: 08/06/2019
• Est. Priority Date: 09/23/2015
• Status: Active Grant

• Current Assignee: JP Morgan Chase Bank, N.A. (JP Morgan Chase & Co)
• Original Assignee: Western Digital Technologies Incorporated (Western Digital Corporation)
• Inventors: Hassner, Martin, Yamamoto, Satoshi
• Primary Examiner(s): Agustin, Peter Vincent
• Application Number:
  US15/925,152
• Publication Number:
  US 20180210668A1
• Time in Patent Office: 505 Days
• Field of Search: None
• 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 11/0793 Remedial or corrective actions recovery from an exception in an instruction pipeline G06F9/3861; by retry G06F11/1402; for recovering from a failure of a protocol instance or entity H04L69/40
• CPC Class Codes: G06F 11/1076 Parity data used in redundant arrays of independent storages, e.g. in RAID systems
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/0653 Monitoring storage devices or systems
• CPC Class Codes: G06F 3/0659 Command handling arrangements, e.g. command buffers, queues, command scheduling
• CPC Class Codes: G06F 3/0676 Magnetic disk device
• CPC Class Codes: G11B 20/10009 Improvement or modification of read or write signals
• CPC Class Codes: G11B 20/1217 on discs
• CPC Class Codes: G11B 20/1833 by adding special lists or symbols to the coded information G11B20/1806, G11B20/1866 take precedence
• CPC Class Codes: G11B 2020/1238 track, i.e. the entire a spirally or concentrically arranged path on which the recording marks are located
• CPC Class Codes: G11B 2020/1292 Enhancement of the total storage capacity
• CPC Class Codes: G11B 5/59627 Aligning for runout, eccentricity or offset compensation G11B5/5534, G11B5/59677, G11B5/59688 take precedence
• CPC Class Codes: H03M 13/35 Unequal or adaptive error protection, e.g. by providing a different level of protection according to significance of source information or by adapting the coding according to the change of transmission channel characteristics

Abstract

A data storage device comprises a host interface and a storage control system coupled to the host interface. The storage control system is configured to perform a write process to write data to storage in response to one or more write operations received over the host interface from a host, determine a quality of written data produced by the write process; and in response to when the quality of the written data fails to satisfy one or more quality criteria, obtain data parity information to compensate for the quality of the written data and write the data parity information to storage.

Claims

1. A data storage device, comprising:

a host interface; and

a storage control system coupled to the host interface and configured to;

perform a write process to write data to storage in response to one or more write operations received over the host interface from a host;

determine a quality of written data produced by the write process; and

in response to the quality of the written data failing to satisfy one or more criteria;

obtain data parity information from the host to compensate for the quality of the written data; and

write the data parity information to storage in association with the written data.

2. The data storage device of claim 1 wherein the storage control system is further configured to obtain the data parity information from a data protection node on the host.

3. The data storage device of claim 2 wherein the storage control system is further configured to indicate the quality of the written data when obtaining the data parity information from the data protection node.

4. The data storage device of claim 1 wherein, to determine the quality of the written data produced by the write process, the storage control system is configured to detect one or more metrics associated with the write process.

5. The data storage device of claim 4 wherein the one or more metrics comprise:

a position error signal (PES) detected during the write process; and

a quantity of parity sectors employed during the write process.

6. The data storage device of claim 1 wherein the storage control system is further configured to skip write verification after writing the data.

7. The data storage device of claim 1 wherein the storage comprises one or more of a rotating hard disk and solid-state media.

8. A computing system comprising:

a host sub-system; and

a data storage device coupled with the host sub-system via a host interface;

wherein the data storage device is configured to at least;

perform a write process to write data in response to one or more write operations received over the host interface from the host sub-system;

determine a quality of written data produced by the write process; and

in response to the quality of the written data failing to satisfy one or more criteria;

obtain data parity information from the host sub-system to compensate for the quality of the written data; and

write the data parity information to storage in association with the written data.

9. The computing system of claim 8 wherein the data storage device is further configured to obtain the data parity information from a data protection node on the host sub-system.

10. The computing system of claim 9 wherein the data storage device is further configured to indicate the quality of the written data when obtaining the data parity information from the data protection node.

11. The computing system of claim 8 wherein, to determine the quality of the written data produced by the write process, the data storage device is configured to detect one or more metrics associated with the write process.

12. The computing system of claim 11 wherein the one or more metrics comprise:

a position error signal (PES) detected during the write process; and

a quantity of parity sectors employed during the write process.

13. The computing system of claim 12 wherein the data storage device is further configured to skip write verification after writing the data.

14. The computing system of claim 8 wherein the data storage device comprises one or more of a hard disk drive (HDD), a solid-state drive (SSD), and a hybrid drive.

15. A method of operating a data storage device, the method comprising:

performing a write process to write data to storage in response to one or more write commands received over a host interface from a host;

determining a quality of written data produced by the write process; and

in response to the quality of the written data failing to satisfy one or more quality criteria;

obtaining data parity information from the host to compensate for the quality of the written data; and

writing the data parity information to storage in association with the written data.

16. The method of claim 15 wherein obtaining the data parity information from the host comprises obtaining the data parity information from a data protection node on the host.

17. The method of claim 16 further comprising indicating the quality of the written data when obtaining the data parity information from the data protection node.

18. The method of claim 15 further comprising detecting one or more metrics associated with the write process, wherein the one or more metrics comprise:

a position error signal (PES) detected during the write process; and

a quantity of parity sectors employed during the write process.

19. The method of claim 15 further comprising skipping write verification after writing the data.

20. A data storage device comprising:

a means for performing a write process to write data in response to one or more write commands received over a host interface from a host;

a means for determining a quality of written data produced the write process;

a means for determining whether the quality of the written data fails to satisfy one or more criteria;

a means for obtaining data parity information from the host to compensate for the quality of the written data in response to the quality of the written data failing to satisfy the one or more criteria; and

a means for writing the data parity information to storage in association with the written data.