Managing snapshots
A snapshot is a point-in-time copy of an operating system volume. It sets up a link between
the source volume and the underlying logical devices in an external storage enclosure. When data on the source volume changes,
the differences are captured on the snapshot drive, maintaining the data as it looked when the snapshot was created.
You can use the snapshot for tape backup, drive cloning, and multi-server rollout.
Working with snapshots
The Snapshot wizard guides you through all of the steps necessary
to create a snapshot. Each snapshot creates a backup of one or more volumes, called a snapshot set.
You cannot perform any actions on the individual snapshots in a snapshot set. To delete or mount a snapshot,
for example, you must use the appropriate action on the Snapshot set object,
in the Snapshots view.
When you create a snapshot, you can run the job immediately or schedule it for a later date and time.
Use the Schedule Manager, in the management service agent console, to monitor and manage scheduled jobs.
Snapshot size
Adaptec Storage Manager displays different size values for a snapshot and its underlying logical devices, depending on the
situation:
- In the Volumes view, Snapshots view, and Logical devices view, it displays
the snapshot virtual size, the maximum size to which the snapshot can grow.
This value is equivalent to the snapshot source volume size.
For example, in the Snapshots view, you might see this, where 109.789MB is the snapshot virtual size:
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When you create a snapshot, Adaptec Storage Manager reserves small amount of space on the underlying logical device
called the Snapshot reserve space. This area stores
information about all of the snapshots in the snapshot set; it grows as data on the source volume changes.
Adaptec Storage Manager displays the reserve space on the Logical device properties panel for the snapshot parent.
It also displays the logical device data space, which is equivalent to the snapshot virtual size.
- In the Logical device properties panel, Adaptec Storage Manager displays the virtual size for the snapshot child.
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In the Snapshot properties panel, Adaptec Storage Manager displays the snapshot size,
which is equivalent to the virtual size.
More information
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