Creating a snapshot, Creating a snapshot 101 – HP StorageWorks 8000 NAS User Manual
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Managing Your Storage 101
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Creating a Snapshot
You can use the snapshot feature to create a read-only point-in-time copy of
a file volume.
To create a new snapshot:
1
In the Command View NAS web interface, click the Storage tab.
2
Navigate down the tree to Snapshots, then select Snapshot Summary.
3
Select Actions > Create New Snapshot.
4
Select the file volume you want to take a snapshot of from the File Volume
drop-down list.
5
Enter a Snapshot Name.
6
Enter the maximum size for the snapshot volume in the Snapshot Capacity
field. A snapshot cannot exceed the file volume size.
7
In the Snapshot Capacity Policy box, select either:
—
Auto Grow at and select a percentage from the drop-down list to
allow the snapshot to grow automatically if it is almost full.
Note: Remember, after the snapshot has been taken, when a file
changes, the original file (at the time the snapshot is taken) is copied to
the snapshot volume. So, for every file that changes, snapshot capacity
is consumed. You want to specify a large enough capacity so that an
original copy of all files that change is saved, but not so large that the
snapshot volume takes up a lot of valuable storage space. You can
always resize a snapshot at a later time.
—
Send Notification at and select a percentage from the drop-down list
to send an SNMP alert when the space used on a snapshot volume
reaches a certain percentage. When data is written to the new
snapshot, the available space in the snapshot volume decreases.
Note: This percentage is used in conjunction with the settings you
entered on the SNMP alert, email, and Syslog configuration pages.
8
In the Snapshot Expiration Policy box, select one of the following:
—
Never if you don't want this snapshot to be automatically deleted. If
you select this option, you must delete the snapshot manually.
—
On This Date and specify a date and time for the snapshot to be
deleted.
—
After and enter a day, week, or month value.
9
Click OK to create the snapshot and close the dialog box.