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Chapter 5. System image snapshots 105
Draft Document for Review November 15, 2007 3:27 pm 4372ch05.fm
is desirable, since it might have captured the state of the machine after the
infection or misconfiguration occurred. However, since the POS plug-in allows
multiple backups to exist at the same time, and allows them to be restored in any
order, it is possible to go back to a point prior to the advent of the problem
providing that enough backups have been retained.
5.4.1 Performing a POS terminal backup
POS backups are not interdependent and it is not necessary to retain a “full”
backup to be used in conjunction with later “incremental” backups. Nevertheless,
it is good practice to perform an initial POS backup immediately after the
machine is first deployed. This will provide at least one known good restore point
which can be retained indefinitely and used to restore the machine if subsequent
backups have all been tainted by a problematic change.
In our lab environment we performed the following steps to create a POS backup
of POS01, from our production server (NICE).
1. Boot the POS terminal into PXE mode from the LAN (Figure 5-8).
Figure 5-8 POS system booted up in PXE mode