Managing storage array configuration

1. A method of managing storage array configuration, comprising:

storing a basic configuration information of a user drive onto a system drive;

storing an extended configuration information of the user drive onto the user drive;

in response to a change of the storage array, either

creating a new disk array group or

updating a disk array group according to the basic configuration information and the extended configuration information; and

further comprises either creating or updating a logical unit on the disk array group;

wherein an N-way mirroring is used for storing extended configuration information of the user drive onto the user drive,

wherein N is a number of user drives included in the disk array group belonging to the user drive.

2. The method according to claim 1 , wherein the basic configuration information comprises:

a validity information; a disk array group identifier information; and logical unit number identifier information.

3. The method according to claim 1 , wherein the extended configuration information comprises:

a validity information; a disk array group identifier information; a drive identifier information; and a logical unit number identifier information.

4. The method according to claim 1 , wherein in response to a change of the storage array, either creating a new disk array group or updating a disk array group according to the basic configuration information and the extended configuration information further comprises:

identifying a drive information on a drive connected to the storage array, wherein the drive information comprises at least one of an initialization information or a storage array information;

according to the drive information, determining that the drive belongs to the storage array when the drive is a user drive;

determining whether extended configuration information on the drive matches basic configuration information on the system drive;

determining validity of the drive either

through extended configuration information on the drive and the basic configuration information on the system drive, or

through the extended configuration information on the drive of the disk array group to which the drive belongs; and

performing at least one of:

based on a creation policy, either creating a new disk array group or updating a disk array group according to extended configuration information on the drive, or

when the storage array comprises other drives of the disk array group to which the drive belongs, adding the drive to the disk array group, or

when the storage array does not comprise other drives of the disk array group to which the drive belongs, creating a new disk array group.

5. The method according to claim 1 , wherein in response to a change of the storage array, either creating a new disk array group or updating a disk array group according to the basic configuration information and the extended configuration information further comprises:

identifying drive information on a drive that is connected to the storage array;

according to the drive information, determining that the drive does not belong to the storage array when the drive is a user drive; and

when there are at least two drives not belonging to the storage array, creating a new disk array group based on the at least two drives according to the basic configuration information and the extended configuration information.

6. The method according to claim 5 , wherein creating a new disk array group based on the at least two drives comprises:

determining a validity of drives of the at least two user drives belonging to the same disk array group, through the extended configuration information of the at least two drives; and

based on a creation policy, creating a new disk array group according to the extended configuration information on the valid drives of at least two drives belonging to the same disk array group.

7. The method according to claim 1 , wherein in response to a change of the storage array, either creating a new disk array group or updating a disk array group according to the basic configuration information and the extended configuration information comprises:

identifying the drive information on a drive that is connected to the storage array;

determining that the drive is not initialized according to the drive information; and

creating a new disk array group or updating a disk array group on the drive based on a creation policy.

8. The method according to claim 1 , wherein the creation policy comprises at least one:

when all the drives constituting a disk array group are discovered, creating the disk array group;

when a number of undiscovered drives in the disk array group is less than or equal to a predetermined value, creating the disk array group;

when at least one drive in the disk array group is discovered, creating the disk array group; and

after a predetermined time of one drive in the disk array group being discovered, creating a disk array group.

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

updating the basic configuration information on the system drive, and storing the updated basic configuration information to the system drive; and

updating the extended configuration information on the disk array group, and storing the updated extended configuration information to the drives of the disk array group.

10. A device for managing storage array configuration, the device configured for:

storing a basic configuration information of a user drive onto a system drive;

storing an extended configuration information of the user drive onto the user drive;

in response to a change of the storage array, either

creating a new disk array group or

updating a disk array group according to the basic configuration information and the extended configuration information; and

further comprises either creating or updating a logical unit on the disk array group;

wherein an N-way mirroring is used for storing extended configuration information of the user drive onto the user drive,

wherein N is a number of user drives included in the disk array group belonging to the user drive.

11. The device according to claim 10 , wherein the basic configuration information comprises:

a validity information; a disk array group identifier information; and a logical unit number identifier information.

12. The device according to claim 10 , wherein the extended configuration information comprises:

a validity information; a disk array group identifier information; a drive identifier information; and a logical unit number identifier information.

13. The device according to claim 10 , wherein in response to a change of the storage array, either creating a new disk array group or updating a disk array group according to the basic configuration information and the extended configuration information further comprises:

identifying a drive information on a drive connected to the storage array, wherein the drive information comprises at least one of an initialization information or a storage array information;

according to the drive information, determining that the drive belongs to the storage array when the drive is a user drive;

determining whether extended configuration information on the drive matches basic configuration information on the system drive;

determining validity of the drive either

through extended configuration information on the drive and the basic configuration information on the system drive or

through the extended configuration information on the drive of the disk array group to which the drive belongs; and

performing at least one of:

based on a creation policy, either creating a new disk array group or updating a disk array group according to extended configuration information on the drive or

when the storage array comprises other drives of the disk array group to which the drive belongs, adding the drive to the disk array group or

when the storage array does not comprise other drives of the disk array group to which the drive belongs, creating a new disk array group.

14. The device according to claim 10 , wherein in response to a change of the storage array, either creating a new disk array group or updating a disk array group according to the basic configuration information and the extended configuration information further comprises:

identifying drive information on a drive that is connected to the storage array;

according to the drive information, determining that the drive does not belong to the storage array when the drive is a user drive; and

when there are at least two drives not belonging to the storage array, creating a new disk array group based on the at least two drives according to the basic configuration information and the extended configuration information.

15. The device according to claim 14 , wherein creating a new disk array group based on the at least two drives comprises:

determining a validity of drives of the at least two user drives belonging to the same disk array group, through the extended configuration information of the at least two drives; and

based on a creation policy, creating a new disk array group according to the extended configuration information on the valid drives of at least two drives belonging to the same disk array group.

16. The device according to claim 10 , wherein in response to a change of the storage array, either creating a new disk array group or updating a disk array group according to the basic configuration information and the extended configuration information comprises:

identifying the drive information on a drive that is connected to the storage array;

determining that the drive is not initialized according to the drive information; and

creating a new disk array group or updating a disk array group on the drive based on a creation policy.

17. The device according to claim 10 , wherein the creation policy comprises at least one:

when all the drives constituting a disk array group are discovered, creating the disk array group;

when a number of undiscovered drives in the disk array group is less than or equal to a predetermined value, creating the disk array group;

when at least one drive in the disk array group is discovered, creating the disk array group; and

after a predetermined time of one drive in the disk array group being discovered, creating a disk array group.

18. The device according to claim 10 , further comprising:

updating the basic configuration information on the system drive, and storing the updated basic configuration information to the system drive; and

updating the extended configuration information on the disk array group, and storing the updated extended configuration information to the drives of the disk array group.