Boot Problem Resolution - IBM BladeCenter JS21 Types 8844 Service Manual

Boot problem resolution

Depending on the boot device, a checkpoint may be displayed on the console for
an extended period of time while the boot image is retrieved from the device. This
is particularly true for CD and network boot attempts. When booting from a CD,
watch for a blinking activity LED on the CD or DVD drive. A blinking activity LED
indicates that the loading of either the boot image, or additional information required
by the operating system being booted, is still in progress. If the checkpoint is
displayed for an extended period of time and the CD- or DVD-drive activity LED is
not blinking, there might be a problem loading the boot image from the device.
Note: For network boot attempts, if the system is not connected to an active
network, or if there is no server configured to respond to the system's boot request,
the system will still attempt to boot. Because time-out durations are necessarily long
to accommodate retries, the system may appear to be hung.
If you suspect a problem loading the boot image, complete the following steps:
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BladeCenter JS21 Types 7988 and 8844: Problem Determination and Service Guide
001
Make sure that your boot list is correct.
1. From the BladeCenter management-module Web interface, display the
boot sequences for the blade servers in your BladeCenter unit: Blade
Tasks → Configuration → Boot Sequence.
2. Find your blade server on the list that is displayed and make sure that
the device from which you are attempting to boot is the first device in
the boot sequence. If it is not, select your blade server from the list of
servers and modify the boot sequence. Cycle power on your blade
server to retry the boot.
Note: If Network is selected, the blade server will try to boot from both
Ethernet ports on the system board.
3. If this boot attempt fails, do the following:
a. If you are attempting to boot from the network, go to Step 002 .
b. If you are attempting to boot from the CD or DVD drive, go to Step
003 .
c. If you are attempting to boot from a hard disk drive, go to Step
004 .
002
If you are attempting to boot from the network:
1. Make sure that the network cabling to the BladeCenter network switch
is correct.
2. Check with the network administrator to make sure that the network is
up.
3. Verify that the blade server for your system is running and configured to
respond to your system.
4. Turn the blade server power off; then, turn it on and retry the boot
operation.
5. If the boot still fails, replace the system-board and chassis assembly.
003
If you are attempting to boot from the CD or DVD drive:
1. From the BladeCenter management-module Web interface, make sure
that the media tray is assigned to your blade server: Blade Tasks →
Remote Control.
2. Turn the blade server power off; then, turn it on and retry the boot
operation.