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Dell PowerVault MD 32XX/36XX Series Storage Arrays CLI Guide

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Start Consistency Group Snapshot Rollback

Description

This command starts a rollback operation to the member base virtual disks in a snapshot consistency group. The content of the base virtual disks changes immediately to match the point-in-time content of the consistency group snapshot virtual disk. The base virtual disks immediately becomes available for read/write requests after the rollback operation has successfully completed. To stop a snapshot consistency group rollback operation, use the stop rollback command for consistency groups.

The repository virtual disk that is associated with the consistency group snapshot virtual disk continues to track any new changes between the base virtual disk and the consistency group snapshot virtual disk that occur after the rollback operation is completed.

To stop a rollback operation to the member base virtual disks use the stop cgSnapImage rollback command.

Syntax

start cgSnapImage ["
                                 consistencyGroupName"] rollback
                                 [memberVirtualDiskSet ["
                                 memberVirtualDiskName1 ... memberVirtualDiskNamen"]]

Parameters

Parameter Description
consistencyGroupName The name of the consistency group for which you want to start a rollback operation. Enclose the name of the consistency group in double quotation marks (" ") inside square brackets ([ ]). When the memberVirtualDiskSet parameter is not used, the rollback process applies to all member virtual disks of the consistency group.
memberVirtualDiskSet The name of one or more member base virtual disks in a consistency group that you want to rollback. Enclose each member base virtual disk name in double quotation marks (" ") inside parentheses(( )).

You can enter more than one member virtual disk name. Enclose all of the member virtual disk names in one set of double quotation marks (" ") inside parentheses(( )). Separate each member virtual disk name with a white space.

Notes

To start a roll back operation for an entire consistency group that has the name congroup1, you would use this command: 
start cgSnapImage ["congroup1"] rollback;
To start a roll back operation for base virtual disk members memVol1, memVol2, and memVol3 in a consistency group that has the name congroup2, you would use this command: 
start cgSnapImage ["CG2:12345"] rollback memberVirtualDiskset=("memVol1 memVol2 memVol3");

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