IBM REDP-4372-00 manual Creating Backups, Wake on LAN, Power off

4372ch05.fm Draft Document for Review November 15, 2007 3:27 pm

5.3.1 Wake on LAN

Selecting this option causes a Wake on LAN (WOL) “magic packet” to be sent to the terminal causing it to power up and beging the boot process. If the terminal is already running then the packet has no effect.

Note: WOL support may also need to be enabled in the POS terminal’s BIOS to support this function.

5.3.2 Power off

If a POS device is booted into PXE mode, then this function can be used to turn it off. This can be used in conjuction with the Wake on LAN function to reboot the machine.

5.4 Creating Backups

Chapters 2-4 discussed in detail the processes for creating and installing initial software loads for POS terminals when they are initially deployed or redeployed. The information in those chapters is mainly concerned with getting “bare metal” machines into the “ready to use” state.

The backup facility added by the POS plug-in on the other hand, is useful for periodically capturing the state of a POS terminal - which may differ from when it was first put into service - so that it can be restored to that state should it experience some sort of malfunction. The key difference here is that the POS backup operation is optimized for speed, not for general applicability and a backup produced by it is only intended to be restored on the single POS terminal against which it was taken.

Note: See section 5.5, “Switching hardware” on page 118 for an exception that applies when replacing an entire POS terminal in the field with an identical unit.

The POS backup function is therefore very useful for capturing dynamic data, configuration changes and so forth, that occur after a POS device is first deployed. If used regularly it provides the capability to restore a terminal to a state that is very near, if not identical, to when a malfunction first occurred.

Indeed, in cases where a virus or a software misconfiguration has caused the system to fail, the most recent POS backup might actually be more accurate than

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