IBM 201 manual Persistent Images

vIf you are restoring a backup that you created using Persistent Images in the NAS Backup Assistant, the NT Backup file (*.BKF) was created for the persistent image virtual drive letter instead of the original drive letter. For example, if you selected drive C for backup, a persistent image was created on the next available drive letter in the system, and that drive was backed up instead of drive C. If you do not remember the original drive letter, you can view the backup log files in NAS Backup Assistant. The top section of the log file gives you the original drive letter, and the bottom section gives you the persistent image drive letter. Now that you have the original drive letter, go to step 2.

2.Click on the Restore using NT Backup link in the Backup and Restore section of the IBM NAS Admin console to open the backup GUI.

3.Click Restore Wizard, then click Next.

4.You are asked what you want to restore. Select the appropriate media that you are restoring from.

5.If you are restoring from tape, expand the backup media pool name, and then double-click on the media (this will normally be named media created on {date - time}). This action will read the set list from the tape.

If you are restoring from file, click the Import File... button, then click Browse and find the .BKF file created for this backup. If you do not know the .BKF file name, refer to the backup log in NAS Backup Assistant. Click OK. You will now have a Media created on {date - time} listed under file. Click on the plus sign (+) to the left of this media to see the set list. You may 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.

6.Select the files and directories you want to restore by placing a check in the corresponding check box.

7.In the bottom left corner of the window, there is an option called Restore files to:. Using the pull-down, select Alternate Location. In the alternate location window, select the root directory of the original backup drive letter you determined in step on page 35.

8.If desired, select Tools from the menu bar at the top of the window, then select Options to change restore options. Refer to NTBackup online help (see Restore files from a file or a tape) for use of these options.

9.Once you have selected the files or directories for restore, the alternate location, and options, click the Start Restore button in the lower right corner.

10.You will now be prompted to confirm that you want to begin the restore. You can click the Advanced button to select advanced options (see the NTBackup online help for details), then click OK to begin the restore.

Persistent Images

A persistent image is a copy you make of one or more file system volumes at a specific time. The Persistent Images function allows the recovery of 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 a second (or third or fourth, and so on) copy 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 NAS 200 drives. You can take a persistent image immediately or schedule

36NAS 200 User’s Reference