Configuration: Premium Feature—Snapshot Virtual Disks 159If an error occurs during the rollback, the operation is paused and the basevirtual disk and snapshot virtual disk displays Needs Attention icons. TheRAID controller module also logs the event to the Major Event Log (MEL).Follow the Recovery Guru procedure to correct the error and repeat therollback operation.WARNING: Risk of data loss: If you cancel a snapshot rollback in progress, thebase virtual disk may remain in an unusable state and the snapshot virtual disk isdisplayed as failed in the MD storage management software. Therefore, do notcancel a snapshot rollback unless reliable recovery options exist for restoring thecontent of the base virtual disk.Command Line OptionsOptionally, you also can use the command line interface (CLI) to start,cancel, resume or modify priority of a snapshot rollback. For moreinformation, see the CLI Guide.Protecting Against a Failed Snapshot RollbackTo protect your base virtual disk data, it is recommended that you create anew snapshot virtual disk from the base virtual disk before beginning arollback operation. If the snapshot rollback fails, use this new snapshot virtualdisk to restore your base virtual disk.Previous Versions of the MD Storage ManagerSnapshot virtual disks created using previous versions of MD StorageManager that did not support snapshot rollback do not have to be recreatedor changed to be used in a subsequent rollback operation. Once the latestversions of the MD storage management software and RAID controllermodule firmware are installed, snapshot virtual disks created under previousversions support the snapshot rollback feature. However, if you revert to anolder version of the MD storage management software after you haveperformed a snapshot rollback, the older MD storage management softwaredoes not support the snapshot virtual disk.Starting a Snapshot RollbackTo start a snapshot rollback:1 In the array management window, select the Logical tab.
