OPERATING METHOD OF DATA STORAGE DEVICE

• US 20160179596A1
• Filed: 03/04/2015
• Published: 06/23/2016
• Est. Priority Date: 12/17/2014
• Status: Abandoned Application

• Current Assignee: SK Hynix Inc.
• Original Assignee: SK Hynix Inc.
• Inventors: KIM, Young Gyun
• Application Number:
  US14/638,716
• Publication Number:
  US 20160179596A1
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 11/1048 using arrangements adapted for a specific error detection or correction feature
• CPC Class Codes: G11C 16/349 Arrangements for evaluating degradation, retention or wearout, e.g. by counting erase cycles
• CPC Class Codes: G11C 2029/0409 Online test
• CPC Class Codes: G11C 29/42 using error correcting codes [ECC] or parity check
• CPC Class Codes: G11C 29/4401 for self repair
• CPC Class Codes: G11C 29/52 Protection of memory contents; Detection of errors in memory contents

Abstract

An operating method of a data storage device includes selecting a memory block including a page in which an uncorrectable error occurs in a read operation, testing whether the selected memory block corresponds to a failure, including the selected memory block in a free block table when the selected memory block corresponds to a success as a result of the testing, and including the selected memory block when the selected memory block corresponds to the failure as a result of the testing.

Claims

1. An operating method of a data storage device, comprising:

selecting a memory block including a page in which an uncorrectable error occurs in a read operation;

testing whether the selected memory block corresponds to a fail;

including the selected memory block in a free block table when the selected memory block corresponds to a success as a result of the testing; and

including the selected memory block in a bad block table when the selected memory block corresponds to the fail as a result of the testing.

2. The operating method according to claim 1, wherein the testing of whether the selected memory block corresponds to the fail comprises:

programming a test pattern in the selected memory block, and reading the selected memory block;

comparing a count of error bits included in data read from the selected memory block and a reference value; and

determining whether the selected memory block corresponds to the fail, based on a result of the comparing.

3. The operating method according to claim 2, wherein, when the count of the error bits included in the read data is equal to or smaller than the reference value, it is determined that the selected memory block corresponds to the success.

4. The operating method according to claim 2, wherein, when the count of the error bits included in the read data exceeds the reference value, it is determined that the selected memory block corresponds to the fail.

5. The operating method according to claim 2, wherein the reading of the selected memory block comprises:

reading only the page in which the uncorrectable error occurs.

6. The operating method according to claim 2, wherein the reading of the selected memory block comprises:

reading a plurality of pages including the page in which the uncorrectable error occurs.

7. The operating method according to claim 2, wherein the testing of whether the selected memory block corresponds to the fail further comprises, before the programming of the test pattern:

copying valid data stored in the selected memory block; and

erasing the selected memory block.

8. The operating method according to claim 1, wherein the testing of whether the selected memory block corresponds to the fail is performed during an idle time.

9. An operating method of a data storage device, comprising:

determining whether an error is correctable when the error is detected in data read from a read-requested page;

selecting a memory block which includes the page, when it is determined that the error is uncorrectable; and

managing reservation information for the selected memory block, and reserving a test for the selected memory block.

10. The operating method according to claim 9, further comprising:

testing the selected memory block, based on the reservation information, during an idle time.

11. The operating method according to claim 10, wherein the reservation information includes address information of the selected memory block and address information of the page.

12. The operating method according to claim 10, wherein the testing of the selected memory block comprises:

programming a test pattern in the selected memory block, and reading the selected memory block;

comparing a count of error bits included in data read from the selected memory block and a reference value; and

determining whether to use the selected memory block based on a result of the comparing.

13. The operating method according to claim 12, wherein the selected memory block is included in a free block table to be used in a subsequent operation, when the count of the error bits included in the read data is equal to or smaller than the reference value.

14. The operating method according to claim 12, wherein the selected memory block is included in a bad block table that is never to be used again, when the count of the error bits included in the read data exceeds the reference value.

15. The operating method according to claim 12, wherein the reading of the selected memory block comprises:

reading only the page.

16. The operating method according to claim 12, wherein the reading of the selected memory block comprises:

reading the page and pages which are physically adjacent to the page.

17. The operating method according to claim 9, further comprising:

detecting whether the error occurs in the data read form the read-requested page.