HP NetStorage 6000, User Manual

Page: 70 / 192

Backing Up and Restoring Files
Disk Checkpoints
5-7
Disk Checkpoints
What Are Disk Checkpoints?
You can use the disk checkpoint feature to create a read-only virtual copy
of your volume. This copy does not consume the equivalent disk space that
an actual copy consumes. Because they are not real copies, checkpoints
appear as a collection of directories in a virtual volume. This volume has
the same name as the original volume but with a
.chkpnt
extension. You
can retrieve data from the checkpoint by browsing to the data you need and
copying it to the desired location. You can also back up checkpoints to tape.
For more information, see “Backing Up Checkpoints” on page 5-17.
You can create checkpoints manually (by checking Immediate) or have
them created automatically at scheduled times by checking the appropriate
boxes. The following table lists the checkpoints you can schedule and their
deletion dates.
You name immediate checkpoints. The system names scheduled
checkpoints based on the creation date and time and their deletion date.
For example, if you created a three-hour scheduled checkpoint on January
19, 2000 at 9 am, the system names that checkpoint
20000119-
090001,6h
. The date of this checkpoint is year 2000, month 01, day 19,
and the time you created it was 09 am, 00 min, 01 seconds. The checkpoint
deletes in 6 hours.
If you do not want the system to delete the checkpoint on its deletion time,
rename the checkpoint (see “Renaming or Deleting Checkpoints” on
page 5-10). The name of the checkpoint is also the name of its directory on
the virtual volume.
Checkpoint Creation Time Deletion
Immediate Now Delete manually
Weekly Every Sunday at 1 am Automatically deletes
in 14 days
Nightly Every weekday at 1 am Automatically deletes
in 7 days
Daily Every weekday at 1 pm Automatically deletes
in 3 days
Every three hours Every weekday from 9 am
to 6 pm Automatically deletes
in 6 hours