Patent ID: 7584224

Claim:
A computer-storage medium having computer-executable instructions for performing a method for exposing a logical volume as on line, the method comprising: reading an epoch value from each extent of the logical volume, the epoch value identifying a last configuration change made to the logical volume while an associated one of each extent was on line and available for access by a data manager; reading a copy epoch value from each extent of a mirrored copy of the logical volume, the copy epoch value identifying a last configuration change made to the mirrored copy of the logical volume while an associated one of each extent of the mirrored copy was on line and available for access by the data manager; comparing the epoch value from each extent of the logical volume and the copy epoch value from each extent of a mirrored copy of the logical volume; receiving a user selection indicating a selected consistency level; and determining a configuration status based on the comparison of the epoch value from each extent of the logical volume and the copy epoch value from each extent of a mirrored copy of the logical volume, and the selected consistency level, wherein the configuration status indicates whether the first logical volume can be exposed as on line and available for access by the data manager.