Hardware Boot; Node Rescue Request; Power Failure; Node-Rescue-Request Display - IBM 2145-8F4 Installation Manual

Hardware boot

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Node rescue request

Power failure

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IBM System Storage SAN Volume Controller: Installation Guide
See the topic containing the boot codes where you can find a description of the
failure and the appropriate steps you must perform to correct the failure.
The hardware boot display shows system data when power is first applied to the
node as the node searches for a disk drive to boot.
If this display remains active for longer than 3 minutes, there might be a problem.
The cause might be a hardware failure or the software on the hard disk drive is
missing or damaged. Refer to the topic on determining a hardware boot failure.
If software is lost, you can use the node rescue process to copy all software from
another node.
Figure 57 shows that a request has been made to exchange the software on this
node. The SAN Volume Controller software is preinstalled on all SAN Volume
Controller nodes. This software includes the operating system, the application
software, and the SAN Volume Controller publications. It is normally not necessary
to replace the software on a node, but if the software is lost for some reason (if the
hard disk drive in the node fails), it is possible to copy all the software from
another node connected to the same fibre channel fabric. This process is known as
node rescue.
Figure 57. Node-rescue-request display
The SAN Volume Controller runs on battery power when main power is lost.
Figure 58 on page 81 shows that the SAN Volume Controller is running on battery
power because main power has been lost. All I/O operations have stopped. The
node is saving cluster metadata and node cache data to the internal disk drive.
When the progress bar reaches zero, the node powers off.
Note: When input power is restored to the uninterruptible power supply, the SAN
Volume Controller turns on without the front panel power button being
pressed.