Persistent Images - IBM totalstorage 326 User Reference

10. To change restore options, select Tools from the menu bar at the top of the
11. After you select the files or directories for restore, the alternate location, and
12. At the prompt, confirm that you want to begin the restore. Click the Advanced

Persistent Images

A persistent image is a copy you make of one or more file system volumes at a
specific time. You can use the Persistent Images function to restore a file or volume
to the state it was in at the time you created the persistent image. Persistent
images are maintained in a way that minimizes the storage required to keep
multiple copies of the volume. This is done by using a copy-on-write technique that
uses, for each volume, an area of pre-allocated storage (the PSM cache file) that
keeps only those data blocks which have been written since the time you made a
persistent image of the volume.
Persistent Storage Manager (PSM) allows you to create and preserve images of the
Model 326 drives. You can take a persistent image immediately or schedule
persistent images as one-time events or regularly repeated events.
You can access the PSM tasks in the Disks/Persistent Storage Manager task group
within the Windows 2000 for Network Attached Storage user interface in one of two
ways:
v Open the IBM NAS Admin console on the appliance desktop and select
v Start the Windows 2000 for Network Attached Storage user interface directly.
Once you create a persistent image, it appears as a directory on the original drive.
Access rights and permissions from the original drive are inherited by the persistent
image. Persistent images are used in the same way as conventional drives.
However, unlike conventional drives, persistent images are records of the content of
the original drive at the time you created the persistent image. Persistent images
are retained following shutdown and reboot.
There are six PSM tasks in the Disks/Persistent Storage Manager group:
v Global Settings
v Volume Settings
v Persistent Images
v Schedules
v Restore Persistent Images
6. Click the plus sign (+) to the left of this media to see the set list. You might be
prompted to enter the path to the file you want to catalog; if so, select the
same file that you just imported. This will build a set list.
7. Select the files and directories to restore.
8. Select Alternate Location from the Restore files to: pull-down.
9. In the alternate location window, select the root directory of the original backup
drive letter you determined (see the note on page 60).
window, and then select Options. Refer to NT Backup online help (see
Restore files from a file or a tape) for use of these options.
options, click the Start Restore button.
button to select advanced options (see the NT Backup online help for details),
then click OK to begin the restore.
Persistent Storage Manager. This automatically launches the Windows 2000 for
Network Attached Storage user interface and brings up the Disks/Persistent
Storage Manager page containing the PSM tasks.
Chapter 6. Managing and protecting the network and storage
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