Patent ID: 7882328

Claim:
A computer-implemented method, comprising: receiving a set of premigration messages, wherein a separate premigration message is received for each logical volume in a chain of logical volumes wherein each of the premigration messages includes a unique message identifier shared by the premigration messages in the chain, a chain member identifier, a total number of members in the chain, a logical volume identifier, and premigration indicators; while processing the premigration messages in order of receipt of each of the premigration messages, receiving a cancel message indicating that premigration of a logical volume in the chain is to be cancelled; in response to determining that the logical volume whose premigration is to be cancelled has not already been transferred to physical storage media, cancelling premigration of the logical volume by removing a premigration message for that logical volume from the set of premigration messages; and continuing to premigrate each other logical volume in the chain of logical volumes in order of receipt.