System and method for virtual vaulting

• US 6,973,369 B2
• Filed: 03/12/2003
• Issued: 12/06/2005
• Est. Priority Date: 03/12/2003
• Status: Active Grant

• Current Assignee: NetApp, Inc.
• Original Assignee: Alacritus, Inc.
• Inventors: Johnston, Craig Anthony, Trimmer, Don Alvin, Blaser, Rico, Stager, Roger
• Primary Examiner(s): Tran, Khoi H.
• Application Number:
  US10/387,319
• Publication Number:
  US 20040181628A1
• Time in Patent Office: 1,000 Days
• Field of Search: 700/214, 700/215, 711/111, 711/112, 711/113, 711/115
• US Class Current: 700/214
• 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: G11B 15/68 Automatic cassette changing arrangements; automatic tape changing arrangements

Abstract

The present invention is a tape library comprising both a small front-end portion and a larger back-end portion. The front-end portion is a visible virtual or physical tape library; and the back-end portion is a large invisible virtual or physical tape vault. The DPA is a typical DPA which only sees the front-end library. If desired, all messages regarding the importing and exporting of tapes are reviewed by an agent. The agent manages the automatic transfer of tapes between the front-end and the back-end, and notifies the user when a manual import or export is needed. This greatly reduces both the amount of hardware required to establish a virtual or physical tape library and also reduces the amount of labor required by a user to physically import and export tapes. If both the front-end library and, the back-end vault are virtual and reside on the same virtual tape library appliance, no data movement is necessary and the tapes can be moved merely by performing small software state changes. In this case, manual operation may be acceptable.

Claims

1. A tape library comprising:

a front-end portion adapted for use with a data protection application, said front-end portion being visible to an end-user, the data protection application for importing and exporting tapes from said front-end portion;

a back-end portion for storing tapes exported by the front-end portion, said back-end portion being invisible to an end-user and the data protection application;

wherein tapes may be automatically exported from the front-end portion to the back-end portion, and may be automatically imported back into the front-end portion without manual intervention;

an agent for determining the availability of tapes and tape slots in the front-end and back-end portions and for managing the transfer of tapes between the front-end and back-end portions, the agent functionally disposed between the data protection application and the end-user and configured to intercept requests made by the data protection application for manual importing and exporting of tapes into and out-of the front-end portion; and

whereby if the agent intercepts a message from the data protection application requesting the end-user to manually import a tape to the front-end portion, the agent automatically determines whether the tape is in the back-end portion and, if so, the agent automatically transfers the tape form-the back-end portion to the front-end portion.

2. The tape library of claim 1 wherein the front-end portion is a virtual tape library.

3. The tape library of claim 1 wherein the front-end portion is a physical tape library.

4. The tape library of claim 1 wherein the front-end portion is smaller than the back-end portion.

5. The tape library of claim 1 wherein the back-end portion is a virtual tape library.

6. The tape library of claim 1 wherein the back-end portion is a physical tape library.

7. The tape library of claim 1 whereby the agent intercepts messages from the data protection application to the end-user.

8. The tape library of claim 1 whereby the agent monitors the importing of tapes to and the exporting of tapes from both the front-end portion and the back-end portion.

9. The tape library of claim 1 whereby the front-end portion has at least one import—

export slot for the importing and exporting of tapes and whereby the agent automatically moves a tape that appears in the import—

export slot of the front-end portion to the back-end portion.

10. The tape library of claim 1 whereby if the tape is not in the back-end portion, the intercepted message is forwarded to the end-user.

11. The tape library of claim 10 wherein the agent notifies the end-user when a tape needs to be manually imported to the front-end portion.

12. The tape library of claim 11 wherein the agent notifies the end-user when a tape needs to be manually exported from the front-end portion.

13. A method for importing and exporting tapes between front and back portions of a tape library comprising:

installing a data protection application on a tape library having front and back portions wherein the data protection application interacts only with the front portion;

intercepting requests made by the data protection application for manual importing and exporting of tapes into and out-of the front portion;

for import requests, determining whether a requested tape is in the back portion;

for export requests, determining whether a requested tape can be stored in the back portion;

exporting tapes requested by the data protection application for manual exportation automatically from the front portion to the back portion of the tape library wherein it is determined that the requested tape can be stored in the back portion;

importing tapes requested by the data protection application for manual importation automatically from the back portion to the front portion wherein it is determined that the requested tape is in the back portion;

notifying a user when a requested tape needs to be manually imported to the front portion wherein it is determined that the requested tape is not in the back portion; and

notifying a user when a requested tape needs to be manually exported from the front portion wherein it is determined that the requested tape cannot be stored in the back portion.

14. A method for importing a tape in a tape library having front and back portions comprising:

installing a data protection application on a front portion of a tape library having front and back portions;

intercepting requests by the data protection application for manual importation of tapes to the front portion;

determining whether a requested tape is in the back portion;

importing the requested tape automatically from the back portion to the front portion wherein it is determined that the requested tape is in the back portion; and

notifying a user when a requested tape needs to be manually imported to the front portion wherein it is determined that the requested tape is not in the back portion.

15. A method for exporting a tape in a tape library having front and back portions comprising:

installing a data protection application on a front portion of a tape library having front and back portions;

intercepting requests by the data protection application for manual exportation of tapes from the front portion;

determining whether a requested tape can be stored in the back portion;

exporting the requested tape automatically from the front portion to the back portion wherein it is determined that the requested tape can be stored in the back portion; and

notifying a user when a requested tape needs to be manually exported from the front portion wherein it is determined that the requested tape cannot be stored in the back portion.