Granted Patent B1

US 8,510,527 · App. 12/901,409 · Granted Aug 13, 2013

Abstract

Claims (25)

1. A machine implemented method for migrating information from a source storage device to a destination storage device via a router, comprising:

selecting the source storage device for migrating information from;

selecting a destination storage device and concluding upon validation that the destination storage device is configured to operate as a thin provisioned storage device for storing information; and

reading information from the source storage device and if the read information is zero, then reading a corresponding segment of the destination storage device and if non-zero information is read from the corresponding segment, then setting an indicator for indicating that the destination storage device is not configured as the thin provisioned storage device; wherein the router reads the information from the source storage device and the corresponding segment of the destination storage device.

2. The method of claim 1 , further comprising:

writing non-zero information read from the source storage device to the destination storage device.

3. The method of claim 1 , wherein if the information read from the corresponding segment of the destination storage device is all zeros, then no information is written to the destination storage device and the destination storage device configuration as a thin provisioned storage device is validated by the router.

4. The method of claim 1 , wherein the selected destination storage device is assumed to be a thin provisioned storage device without validation and non-zero information read from the source storage device is written to the destination storage device by the router.

5. The method of claim 4 , wherein when information that is read from the source storage device is zeroes, then the zeroes are not written to the destination storage device by the router.

6. The method of claim 1 , wherein the source storage device and the destination storage device are presented as a logical unit number (LUN) for reading and writing information.

7. A system, comprising:

a computing system having access to a source storage device via a router; and

a destination storage device for storing information that is migrated from the source storage device; wherein the router coupled to the source storage device and the destination storage device facilitates migration from the source storage device to the destination storage device;

wherein when the destination storage device is selected for migration it is presumed without validation to be configured to operate as a thin provisioned storage device for storing information and when non-zero information is read from the source storage device it is written by the router to the destination storage device; and

wherein the destination storage device configuration to operate as a thin provisioned storage device is validated by the router by reading information from the source storage device and if the read information is zero, then the router reads a corresponding segment of the destination storage device and if non-zero information is read from the corresponding segment, the router sets an indicator indicating that the destination storage device is not configured as the thin provisioned storage device.

8. The system of claim 7 , wherein if the information read from the corresponding segment of the destination storage device is all zeros, then no information is written to the destination storage device and the destination storage device configuration as a thin provisioned storage device is validated.

9. The system of claim 7 , wherein if information read from the source storage device is zeros, then it is not written to the destination storage device.

10. The system of claim 7 , wherein the source storage device and the destination storage device are presented as a logical unit number (LUN) for reading and writing information.

11. A router operationally coupled to a source storage device and a destination storage device for storing information that is migrated from the source storage device to the destination storage device, comprising:

a processor executing code out of a memory for receiving information from the source storage device and if the received information is zero, then reading a corresponding segment of the destination storage device and if non-zero information is read from the corresponding segment, then setting an indicator in the memory indicating that the destination storage device is not configured as the thin provisioned storage device;

wherein the router writes non-zero information read from the source storage device to the destination storage device.

12. The router of claim 11 , wherein if the information read from the corresponding segment of the destination storage device is all zeros, then no information is written to the destination storage device and the destination storage device configuration as a thin provisioned storage device is validated by the router.

13. The router of claim 11 , wherein the destination storage device is assumed to be a thin provisioned storage device without validation and when non-zero information is read from the source storage device it is written to the destination storage device by the router.

14. The router of claim 11 , wherein when information that is read from the source storage device is zeroes, then the zeroes are not written to the destination storage device by the router.

15. The router of claim 11 , wherein the source storage device and the destination storage device are presented as a logical unit number (LUN) for reading and writing information.

Assignments (6)