Patent ID: 7487385
Filing Date: 2009-02-03
Classification: G06F

Abstract:
1. A method of updating configuration information associated with a data volume for use in a restore operation after the data volume has been destroyed, the method comprising: maintaining first configuration information indicating a configuration of the data volume pertaining to a physical storage device set in the data volume, wherein the first configuration information includes a time stamp; maintaining second configuration information of the data volume, wherein the second configuration information is a subset of the first configuration information and includes portions of the first configuration information for use by the restore operation; reducing occurrences of updates of the second configuration information of the data volume by updating the second configuration information only when an update occurs to the configuration of the data volume; updating the time stamp for the second configuration information when the second configuration information is updated; identifying the second configuration information with a most recent time stamp, wherein the most recent time stamp corresponds to a most recent configuration of the data volume; and using with the second configuration information with the most recent time stamp for restoring the data volume after the data volume has been destroyed.