Editing a snapshot schedule
Use the
Edit Snapshot Image Schedule
option to modify the schedule settings defined for a snapshot group or consistency group. You
can also use the
Edit Snapshot Image Schedule
option to temporarily suspend scheduled snapshot image creation by disabling the
schedule. When a schedule is disabled, the scheduled snapshot image creations do not occur.
To edit a schedule:
1
From the AMW, select the
Storage & Copy Services
tab.
2
Select the snapshot group or consistency group for which you want to edit a schedule.
3
Do one of the following:
•
Copy Services
>
Snapshot Group
>
Edit Snapshot Image Schedule.
•
Copy Services
>
Consistency Group Snapshot Image
>
Create/Edit Schedule.
The
Edit Snapshot Image Schedule
window is displayed.
4
Do one of the following:
•
If you want to disable the schedule, de-select
Enable Snapshot Image Scheduling
.
•
If you want to use a different existing schedule, click
Import settings from existing schedule
. The
Import Schedule Settings
dialog is displayed. Select the new schedule you want to import from the
Existing schedules
table and then click
Import
.
•
If you want to edit the schedule, modify the schedule settings.
5
Click
OK
to apply your changes to the schedule for the snapshot group or consistency group you selected.
Performing snapshot rollbacks
You can rollback snapshot operations by either:
•
Creating a snapshot virtual disk of a snapshot image, which allows you to retrieve deleted files from that snapshot virtual disk (the base
virtual disk remains undisturbed).
•
Restoring a snapshot image to the base virtual disk, which allows you to roll back the base virtual disk to a previous point-in-time.
NOTE:
The host will have immediate access to the new-rolled-back base virtual disk, but the existing base virtual disk will not
allow the host read-write access after the rollback is initiated. You can create a snapshot of the base virtual disk just before you
start the rollback to save the pre-rollback base virtual disk for recovery purposes.
Snapshot images are useful any time you want to roll back to a known good data set at a specific point in time. For example, before
performing a risky operation on a virtual disk, you can create a snapshot image to enable “undo” capability for the entire virtual disk. You
can start a rollback from the following types of snapshot images:
•
Snapshot image of a base virtual disk, which allows you to roll back the base virtual disk associated with a snapshot group to a previous
state.
•
Consistency group snapshot image, which allows you to roll back all or select member virtual disks of the consistency group to a
previous state.
Snapshot rollback limitations
•
The rollback operation does not change the content of the snapshot images that are associated with the base virtual disk.
•
You cannot perform the following actions when a rollback operation is in progress:
– Delete the snapshot image that is being used for the rollback.
– Create a new snapshot image for a base virtual disk that is participating in a rollback operation.
– Change the associated snapshot group’s Repository-Full Policy.
•
You cannot start a rollback operation when any of these operations are in progress in the storage array:
– Expanding the capacity of a disk group.
Premium feature—Snapshot Virtual Disk
115
