Patent ID: 9436409
Filing Date: 2016-09-06
CPC Classification: G06F

Claim Text:
1. A machine implemented method, comprising: transferring a superblock of a read-only replica of a source virtual volume from a source storage system to a destination virtual volume at a destination storage system, where the superblock includes information regarding the read-only replica; modifying the superblock of the read-only replica in a memory of the destination storage system to clear a replica flag associated therewith for converting the read-only replica of the source virtual volume to a writable destination virtual volume at the destination storage system; associating the modified superblock with at least one virtual volume block number (virtual VBN) configured to be previously associated with the superblock of the read-only replica of the source virtual volume of the source storage system without initiating a destination consistency point (DCP) at the destination storage system to render the destination virtual volume writable, wherein the virtual VBN is configured to index a virtual volume level version of block allocation files of a virtual volume including the source virtual volume and the destination virtual volume; modifying a device group label indicating an association of a destination storage device with the read-only replica of the source virtual volume of the source storage system to reflect an association of the destination storage device with the writable destination virtual volume; and storing the modified superblock and the modified device group label associated with the writable destination virtual volume to the destination storage device.