Dell PowerVault MD3820f - Manual (Page 144)

view the progress of the rollback operation for a snapshot image and its associated base virtual disk or
consistency group member virtual disk.
1. From the AMW, select the Storage & Copy Services tab.
2. Select the storage array for which you want to display the operations in progress.
The Operations in Progress window is displayed.
3. To view the progress for operations that affect a base virtual disk or a consistency group snapshot
image, click the triangle next to a base virtual disk or a consistency group snapshot image to expand
or collapse it.
4. To change the interval for refreshing the display, use the spinner box in the lower-right corner of the
window, and click Update.
5. To refresh the display immediately, click Refresh Now.
Changing Snapshot Rollback Priority
You can set the priority for a rollback operation. Higher priority allocates more system resources for the
rollback operation and might affect the overall system performance.
You can change the rollback priority at any of these times:
• Before the rollback begins
• While the rollback operation has a status of In Progress
There are five priority rates available: lowest, low, medium, high, and highest.
• If the priority is set at the lowest rate, I/O activity is prioritized and the rollback operation takes longer
time to complete.
• If the priority is set at the highest priority rate, the rollback operation is prioritized, but I/O activity for
the storage array may be affected.
1. From the AMW, select the Storage & Copy Services tab.
2. Do one of the following:
– Select a snapshot image of either a base virtual disk or of a consistency group’s member virtual
disk and then select Copy Services → Snapshot Image → Rollback → Change Priority.
– Select a consistency group of either a base virtual disk or of a consistency group’s member virtual
disk and then select Copy Services → Consistency Group Snapshot Image → Rollback →
Change Priority.
The Change Rollback Priority window is displayed.
3. In the rollback priority area, use the slider bar to set a priority for the rollback operation.
If you are changing the priority for a consistency group snapshot image, the priority setting is applied
to all member virtual disks in the selected consistency group.
4. Click Change to apply your changes to the rollback priority.
Creating A Snapshot Group
A snapshot group is a sequence of point-in-time images of a single associated base virtual disk. A
snapshot group uses a repository to save data for all snapshot images contained in the group. The
repository is created at the same time the snapshot group is created.
Keep these guidelines in mind when creating a snapshot group:
• When a base virtual disk that contains a snapshot group is added to an asynchronous remote
replication group, the system automatically changes the repository full policy to automatically purge
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