IBM TotalStorage NAS 300, User Reference

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Disaster Recovery
PSM provides a disaster recovery solution for the system drive. This extends the
volume restore function of PSM to provide disaster recovery in the event that the
system drive is corrupted to the point where the file system is corrupt, or the
operating system is unbootable. Note that while disaster recovery is also supported
through the Recovery CD-ROM and backup and restore capability, it is a two-step
process. In contrast, the method supported by PSM allows you to restore the
system drive from a single image, without having to go through the entire recovery
procedure and then additionally having to restore a system drive backup.
Use the Disaster Recovery panel to schedule and create backup images of the
system drive, and to create a bootable diskette that will allow you to restore the
system drive from a backup image (located on the maintenance partition, or
network drive). The remainder of this section provides additional information on how
to perform backup and recovery operations for the NAS Gateway 300.
Note: Restoration of a PSM backup image over the network is not supported for
the Gigabit Ethernet adapter. If you have only Gigabit Ethernet adapters
installed, it is recommended that you perform PSM backup of each node to
its maintenance partition (D: drive), which would allow you to recover if the
system volume is corrupt or unbootable. Should the hard disk drive fail
completely, you would need to use the Recovery CD-ROM as described in
Chapter 9, “Using the Recovery and Supplementary CD-ROMs” on page 111
to restore the node to its original (factory) configuration.
Backing up the system drive
The Disaster Recovery panel lists status information for backup operations, both
scheduled and immediate, as well as buttons for starting and stopping a backup
operation, for configuring backup, and for creating a recovery diskette.
Click Modify Settings to open the Disaster Recovery Settings page. Modify the
settings that you want for backup. Do not include spaces in the Backup name field.
When you have modified the settings, click
OK to save the changes.
On the Disaster Recovery page, click Start Backup to begin the backup. The
backup process will first create a persistent image of the system drive (C:), named
System Backup . Then, it will create the backup images from that persistent image,
and then delete that persistent image when the backup operation is complete.
Creating a PSM recovery diskette
You will now create a bootable PSM recovery diskette which, when used to boot up
the node, will use the backup location settings that you configured on the Disaster
Recovery Settings page to locate the backup image and restore it to the system
drive of the node.
1. Insert a blank, formatted diskette in the diskette drive of the node.
2. On the Disaster Recovery page, click Create Disk .
3. Click OK on the Create Recovery Disk page. The diskette drive LED will turn off
when the creation is complete. The diskette creation should take no more than
two minutes.
4. The utility makes the disk DOS-bootable. From a command prompt, either
through the desktop of the node itself (with the diskette still in the diskette drive
of the node), or on another system with the diskette in its diskette drive, type
a:\fixboot.exe and answer the prompts.
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NAS Gateway 300 User’s Reference