Method and system for managing storage device

• US 10,572,163 B2
• Filed: 06/15/2017
• Issued: 02/25/2020
• Est. Priority Date: 06/16/2016
• Status: Active Grant

• Current Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Original Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Inventors: Liu, Yousheng, Han, Geng, Dong, Jibing, Jia, Ruiyong, Gao, Jian, Xu, Xinlei
• Primary Examiner(s): Nguyen, Than
• Application Number:
  US15/623,636
• Publication Number:
  US 20170364289A1
• Time in Patent Office: 985 Days
• Field of Search: 711114
• 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 3/065 Replication mechanisms
• CPC Class Codes: G06F 3/0665 at area level, e.g. provisioning of virtual or logical volumes
• CPC Class Codes: G06F 3/0689 Disk arrays, e.g. RAID, JBOD

Abstract

Embodiments of the present invention provide a method and system for managing a storage area. In one embodiment of the present invention, there is provided a method for managing a storage areas, comprising: obtaining a storage area in a storage system according to a predefined dividing rule; determining status regarding whether the storage area has been used; setting a status identifier for the storage area based on the use status; and managing the storage area based on the status identifier. In another embodiment, there is proposed a system for managing a storage area, comprising: one or more processors; a memory coupled to at least one processor of the one or more processors; computer program instructions stored in the memory'"'"' which, when executed by the at least one processor, cause the system to execute a method for managing a storage area.

Claims

1. A method for managing a storage area, comprising:

obtaining a storage area in a storage system according to a predefined dividing rule;

determining status regarding whether the storage area has been used includes, in response to receipt of an initialization operation to initialize the storage system, setting the status identifier to “

unused”

status without physically clearing data stored in the storage area prior to the initialization operation from the storage area;

setting a status identifier for the storage area based on the use status; and

managing the storage area based on the status identifier, wherein managing the storage area based on the status identifier comprises;

in response to receipt of a rebuilding operation to rebuild the storage system, determining status of the status identifier, and

in response to the status identifier being “

unused”

, skipping recovery processing on the storage area.

2. The method according to claim 1, further comprising:

in response to receipt of the initialization operation to initialize the storage system, setting a status identifier of other storage area in the storage system to “

unused”

status.

3. The method according to claim 1, wherein the managing the storage area based on the status identifier comprises:

in response to receipt of a write operation to write to the storage area, determining status of the status identifier; and

in response to the status identifier being “

unused,”

clearing data in the storage system;

writing data to a target address; and

setting the status identifier as “

used.”

4. The method according to claim 3, further comprising:

in response to the status identifier being “

used,”

writing target data associated with the write operation to a target address indicated by the write operation.

5. The method according to claim 1, wherein the managing the storage area based on the status identifier comprises:

in response to receipt of a read operation to read from the storage area, determining status of the status identifier; and

in response to the status identifier being “

unused,”

returning “

empty;

”

otherwise returning target data from a target address in the storage area which is indicated by the read operation.

6. The method according to claim 1, further comprising:

in response to the status identifier being “

used,”

recovering data, from an online storage device associated with the storage area, for writing into a backup storage area used for replacing the storage area.

7. The method according to claim 1, further comprising:

forbidding a read operation and a write operation from being performed on a storage area in the storage system, during an initialization operation to initialize the storage system.

8. The method according claim 1, wherein the obtaining a storage area in a storage system based on a predefined dividing rule comprises:

taking one or more stripes in the storage system as the storage area.

9. A system for managing a storage area, comprising:

one or more processors;

a non-transitory memory coupled to at least one processor of the one or more processors;

computer program instructions stored in the memory which, when executed by the at least one processor, cause the system to;

obtain a storage area in a storage system according to a predefined dividing rule;

determining status regarding whether the storage area has been used includes, in response to receipt of an initialization operation to initialize the storage system, setting the status identifier to “

unused”

status without physically clearing data stored in the storage area prior to the initialization operation from the storage area;

set a status identifier for the storage area based on the use status; and

manage the storage area based on the status identifier, wherein managing the storage area based on the status identifier comprises;

in response to receipt of a rebuilding operation to rebuild the storage system, determining status of the status identifier, and

in response to the status identifier being “

unused,”

skipping recovery processing on the storage area.

10. The system according to claim 9, wherein the computer program instructions, when executed by the at least one processor, further cause the system to:

in response to receipt of the initialization operation to initialize the storage system, set a status identifier of other storage area in the storage system to “

unused”

status.

11. The system according to claim 9, wherein the computer program instructions, when executed by the at least one processor, further cause the system to:

in response to receipt of a write operation to write to the storage area, determine status of the status identifier; and

in response to the status identifier being “

unused,”

clear data in the storage system;

write data to a target address; and

set the status identifier as “

used.”

12. The system according to claim 11, wherein the computer program instructions, when executed by the at least one processor, further cause the system to:

in response to the status identifier being “

used,”

write target data associated with the write operation to a target address indicated by the write operation.

13. The system according to claim 9, wherein the computer program instructions, when executed by the at least one processor, further cause the system to:

in response to receipt of a read operation to read from the storage area, determine status of the status identifier; and

in response to the status identifier being “

unused,”

return “

empty;

”

otherwise return target data from a target address in the storage area which is indicated by the read operation.

14. The system according to claim 9, wherein the computer program instructions, when executed by the at least one processor, further cause the system to:

in response to the status identifier being “

used,”

recover data, from an online storage device associated with the storage area, for writing into a backup storage area used for replacing the storage area.

15. The system according to claim 9, wherein the computer program instructions, when executed by the at least one processor, further cause the system to:

forbid a read operation and a write operation from being performed on a storage area in the storage system, during an initialization operation to initialize the storage system.

16. The system according to claim 9, wherein the computer program instructions, when executed by the at least one processor, further cause the system to:

take one or more stripes in the storage system as the storage area.