STORAGE DEVICE WITH ERROR RECOVERY INDICATION

• US 20140351627A1
• Filed: 05/21/2013
• Published: 11/27/2014
• Est. Priority Date: 05/21/2013
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: BEST, Steven F., GIROUARD, Janice M., REILAND, Robert E., SHIRAN, Yehuda
• Granted Patent: US 9,317,382 B2
• Time in Patent Office: Days
• US Class Current: 714/6.11
• 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 11/073 in a memory management context, e.g. virtual memory or cache management memory management G06F12/00; testing of static memory units G11C29/00
• 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 11/2053 where persistent mass storage functionality or persistent mass storage control functionality is redundant error detection or correction in information storage based on relative movement between record carrier and transducer G11B20/18
• CPC Class Codes: G06F 11/2056 by mirroring
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/0644 Management of space entities, e.g. partitions, extents, pools
• CPC Class Codes: G06F 3/0676 Magnetic disk device

Abstract

Methods, apparatus and computer program products implement embodiments of the present invention that enable a controller of a storage device having storage media to perform one or more error recovery operations on the storage media, and to convey, while performing the one or more error recovery operations, a message indicating a status of the one or more error recovery operations to a host processor in communication with the storage device. Storage devices implementing embodiments of the present invention include hard disk drives and solid state disk drives.

Claims

1. A storage device, comprising:

storage media configured to store data; and

a controller having a controller processor configured to perform one or more error recovery operations on the storage media, and to convey, while performing the one or more error recovery operations, a message indicating a status of the one or more error recovery operations to a host processor in communication with the storage device.

2. The storage device according to claim 1, wherein the storage device is selected from a list comprising a hard disk drive and a solid state disk drive.

3. The storage device according to claim 1, wherein the controller processor is configured to convey the message in response to receiving an input/output (I/O) request from the host processor.

4. The storage device according to claim 3, wherein the I/O request is selected from a list comprising a read data request and a write data request.

5. The storage device according to claim 1, wherein the controller processor is configured to convey the message by broadcasting the message to the host processor upon the controller processor initiating the one or more error recovery operations.

6. The storage device according to claim 1, and comprising a disk head having a magnetoresistive (MR) element configured to read and write data to and from the storage media, and coupled to an analog/digital (A/D) converter, and wherein the one or more error recovery operations are selected from a list comprising changing an automatic gain control of the A/D converter, positioning the disk head off-track in order to read the data, and adjusting a bias value of the MR element.

7. The storage device according to claim 1, wherein the controller processor is configured to receive, from the host processor, a request to identify the one or more error recovery operations, to convey, in response to receiving the request, a message to the host processor identifying the one or more error recovery operations, to receive, from the host processor, a subsequent request to cancel one of the one or more identified error recovery operations, and to cancel execution of the one of the one or more identified error recovery operations in response to the subsequent request.

8. The storage device according to claim 7, wherein the one of the one or more identified error recovery operations is selected from a list comprising a first error recovery operation currently executing on the controller processor and a second error recovery operation scheduled to be executed by the controller processor.

9. A method, comprising:

performing, by a storage device having storage media, one or more error recovery operations on the storage media; and

conveying, while performing the one or more error recovery operations, a message indicating a status of the one or more error recovery operations to a host processor in communication with the storage device.

10. The method according to claim 9, wherein the storage device is selected from a list comprising a hard disk drive and a solid state disk drive.

11. The method according to claim 9, and comprising receiving an input/output (I/O) request from the host processor, and conveying the message in response to the I/O request.

12. The method according to claim 11, wherein the I/O request is selected from a list comprising a read data request and a write data request.

13. The method according to claim 9, wherein conveying the message comprises broadcasting the message to the host processor upon the controller processor initiating the one or more error recovery operations.

14. The method according to claim 9, wherein the storage device comprises a disk head having a magnetoresistive (MR) element configured to read and write data to and from the storage media, and coupled to an analog/digital (A/D) converter, and wherein the one or more error recovery operations are selected from a list comprising changing an automatic gain control of the A/D converter, positioning the disk head off-track in order to read the data, and adjusting a bias value of the MR element.

15. The method according to claim 9, and comprising receiving, from the host processor, a request to identify the one or more error recovery operations, conveying, in response to the request, a message to the host processor identifying the one or more error recovery operations, receiving, from the host processor, a subsequent request to cancel one of the one or more identified error recovery operations, and canceling execution of the one of the one or more error identified recovery operations in response to the subsequent request.

16. The method according to claim 15, wherein the one of the one or more identified error recovery operations is selected from a list comprising a first error recovery operation currently being executed by the storage device and a second error recovery operation scheduled to be executed by the storage device.

17. A computer program product, the computer program product comprising:

a non-transitory computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising;

computer readable program code configured to perform, by a storage device having storage media, one or more error recovery operations on the storage media; and

computer readable program code configured to convey, while performing the one or more error recovery operations, a message indicating a status of the one or more error recovery operations to a host processor in communication with the storage device.

18. The computer program product according to claim 17, and comprising computer readable program code configured to receive an input/output (I/O) request from the host processor, and to convey the message in response to the I/O request.

19. The computer program product according to claim 17, wherein the computer readable program code is configured to convey the message by broadcasting the message to the host processor upon the controller processor initiating the one or more error recovery operations.

20. The computer program product according to claim 17, and comprising computer readable program code configured to receive, from the host processor, a request to identify the one or more error recovery operations, to convey a message to the host processor identifying the one or more error recovery operations, to receive, from the host processor, a subsequent request to cancel one of the one or more identified error recovery operations, and to cancel execution of the one of the one or more identified error recovery operations in response to the subsequent request.