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Chapter 9. Using the Recovery and Supplementary CD-ROMs

Attention:

Changing the preloaded software configuration of this product,

including applying or installing unauthorized service packs or updates to preinstalled
software, or installing additional software products that are not included in either the
preloaded image or on the Supplementary CD-ROM might not be supported and
could cause unpredictable results. For updated compatibility information, see:

www.ibm.com/storage/support/nas

To correct problems with a preloaded software component, back up your user and
system data. Then, use the Recovery CD-ROM Set to restore the preloaded
software image.

This chapter describes the applications included on the Supplementary and
Recovery CD-ROMs, and how and when you should use them.

As an alternative to using the Recovery CD-ROM Set, you can use the restore
portion of the disaster recovery solution provided by Persistent Storage Manager
(PSM) to recover the node. The restore function allows you to restore the node to
the state it was in at the time of the PSM backup in one step. You will not have to
revert back to the original (factory) configuration, which would require you to
subsequently reconfigure clustering and other components. See “Restoring the
system drive using the PSM recovery diskette” on page 67 to determine whether
you meet the requirements to use PSM. If you have not met the requirements for
using the PSM recovery method, or if the PSM recovery fails, then you must use
the Recovery CD-ROM Set as described in this chapter.

Using the Recovery Enablement Diskette and Recovery CD-ROM

The Recovery CD-ROM Set (four CD-ROMs, labeled as “Recovery CD-ROM 1,”
“Recovery CD-ROM 2,” “Recovery CD-ROM 3,” and “Recovery CD-ROM 4”)
contains the preload image for this appliance and is used to recover the preloaded
image on either node. You must start the (failed) node using the Recovery
Enablement Diskette before you can boot from Recovery CD-ROM 1.

Attention:

The Model G27 does not have a monitor, keyboard, or mouse attached

to it under normal operating conditions. Because of this, you cannot interact with
the preload-image restore process using a monitor. Starting Recovery CD-ROM 1
will, without visually prompting the user, automatically destroy all data on the
system drive. Use the Recovery Enablement Diskette and Recovery CD-ROM Set
only when it is absolutely necessary to restore the preloaded system image.

To recover the preloaded image on a (failed) node, perform the following steps:

1. Delete all persistent images to ensure a clean reload of the system software.

Note:

The recovery process invalidates persistent images and leaves them in
a state that is inconsistent with their pre-recovery state.

2. On the other (operational) node of the Model G27, select

Cluster

Administration

, located in the Cluster Tools folder in the IBM NAS Admin. If

prompted for a cluster name, enter the name of the cluster, and then click

Open

3. The cluster name appears in the left panel. Underneath it, locate the name of

the failed node, right-click the failed node machine name, and select