Systems and methods for managing location of media in a storage system

• US 7,958,086 B2
• Filed: 11/23/2010
• Issued: 06/07/2011
• Est. Priority Date: 09/16/2002
• Status: Active Grant

• Current Assignee: CommVault Systems Incorporated
• Original Assignee: CommVault Systems Incorporated
• Inventors: Kottomtharayil, Rajiv, Amarendran, Arun Prasad, Ilkal, Zahid
• Primary Examiner(s): Corrielus; Jean M
• Application Number:
  US12/952,456
• Publication Number:
  US 20110072041A1
• Time in Patent Office: 196 Days
• Field of Search: 707/609, 707/999.104, 707/999.202, 707/999.001, 707/999.204, 711/161, 711/114, 711/111
• US Class Current: 707/609
• CPC Class Codes: G06F 3/0605 by facilitating the interaction with a user or administrator
• CPC Class Codes: G06F 3/0632 by initialisation or re-initialisation of storage systems
• CPC Class Codes: G06F 3/0686 Libraries, e.g. tape libraries, jukebox
• CPC Class Codes: Y10S 707/99931 Database or file accessing
• CPC Class Codes: Y10S 707/99945 Object-oriented database structure processing
• CPC Class Codes: Y10S 707/99948 Application of database or data structure, e.g. distributed, multimedia, or image
• CPC Class Codes: Y10S 707/99953 Recoverability

Abstract

A system and method for operating a storage library. The system comprises a management server, a media agent connected to the management server, a library connected to the media agent and a database connected to the management server. The management server controls the media agent to monitor for the addition or removal of a piece of media in the library. When the media agent determines that the piece of media has been added to the library or removed from the library, the media agent causes the library to read a media label stored as data on the piece of media, the media label including an identifier identifying the piece of media. When a backup or restore is performed, the system checks the media label to ensure that the correct media is being used. Inventory procedures are disclosed. Media labels are stored in a database along with an indication of the corresponding slot where the media is stored, a time when the label was put on the medium, and a confidence parameter indicating how confident the system is that the particular medium is stored in the respective slot.

Claims

1. A method of restoring data, the method comprising:

receiving a restoration request to restore information stored in media in both a sighted storage device library and a blind storage media device library;

using a database to identify desired media in the sighted storage media device library and desired media in the blind storage media device library that are associated with the restoration request;

identifying with the database a first location of the desired media in the blind storage media device library, wherein the first location is associated with a previously know location of the desired media;

comparing the on-media label of mounted media associated with the first location with a on-media label for the desired media stored in the database; and

if the on-media labels do not match, selecting a second location by searching other locations within the blind storage media device library.

2. The method as recited in claim 1, wherein searching for the desired media is based on the location in the database for the on-media label of the mounted media.

3. The method as recited in claim 1, wherein searching for the desired media is based on a slot location in the database for the on-media label of the mounted media.

4. The method as recited in claim 1, wherein searching for the desired media is based on the location in the database is based on the time the desired media was identified as confident.

5. The method as recited in claim 1, wherein searching for the desired media is based on the location in the database is based on the oldest update time of the desired media.

6. The method as recited in claim 1, wherein searching for the desired media searches for a slot assigned to the desired piece of media.

7. The method of claim 1 further comprising updating an entry in the database with an indication of a slot associated with media in the blind storage media device library.

8. The method of claim 1 wherein the database further comprises a confidence parameter indicating a confidence level that media identified as being associated with a slot is correctly identified.

9. The method of claim 8 wherein the confidence parameter is stored in a slot table that further identifies a slot assigned to each media.

10. A system for restoring data, the system comprising:

a sighted storage device library;

a blind storage device library;

a restoration request to restore information stored in media in both the sighted storage device library and the blind storage media device library;

a database that identifies desired media in the sighted storage media device library and desired media in the blind storage media device library that are associated with the restoration request, wherein the database identifies a first location of the desired media in the blind storage media device library, and wherein the first location is associated with a previously know location of the desired media;

one or more computer processors that are configured to compare the on-media label of mounted media associated with the first location with a on-media label for the desired media stored in the database, and if the on-media labels do not match, the one or more computer processors select a second location by searching other locations within the blind storage media device library.

11. The system as recited in claim 10, wherein searching for the desired media is based on the location in the database for the on-media label of the mounted media.

12. The system as recited in claim 10, wherein searching for the desired media is based on a slot location in the database for the on-media label of the mounted media.

13. The system as recited in claim 10, wherein searching for the desired media is based on the location in the database is based on the time the desired media was identified as confident.

14. The system as recited in claim 10, wherein searching for the desired media is based on the location in the database is based on the oldest update time of the desired media.

15. The system as recited in claim 10, wherein when searching for the desired media searches for a slot assigned to the desired piece of media.

16. The system of claim 10 further comprising a database entry that indicates a slot associated with media in the blind storage media device library.

17. The system of claim 10 wherein the database further comprises a confidence parameter indicating a confidence level that media identified as being associated with a slot is correctly identified.

18. The system of claim 17 wherein the confidence parameter is stored in a slot table that further identifies a slot assigned to each media.