Red Hat ENTERPRISE LINUX WS 2.1 - Przewodnik Instalacji Pobierz pdf (Strona 187)

Troubleshooting TopSpin 187

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INDEX

12.3.1.6 View/change the prom parameters

1. Open a shell and become root

2. Type cu -lttyS1

→ You will get the prompt

connected and you can see the CCU output

messages:

a) Push the reset button of the CCU

b) Press Control-C to interrupt the boot process

The CCU will be in Monitor Mode now, the prompt will change to >>, type:

>> printenv

You will get a list of environment variables, the most important are:

netaddr=149.236.99.99

netmask=0xffffff00

bootfile=bfs()/usr/diskless/clients/spect/root/unix.r4600_std

bootmode=c

These values must be shown as specified above

. You can set the environment

variables as follows:

>> setenv netaddr 149.236.99.99

>> setenv netmask 0xffffff00

To boot the CCU again, type:

>> u

c) To exit the cu program type:

>> ~.Enter (press the keys: tilde, dot, Enter)

12.3.1.7 Viewing the boot process

When all environment parameters are correct, you can view the boot process and

see where it hangs. This might give you an indication as to what the problem is.

1. For CCU 4-7 the bootfile entry is:

bootfile=bfs()/usr/diskless/clients/spect/root/unix.r3004_std

2. If the netaddr is different, the spectrometer network files must be adjusted. However,

when you install the DISKLESS package the entries are set back to 149.236.99.99

and your

CCU will not boot anymore. Therefore we strongly recommend not to change the netaddr.

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Red Hat ENTERPRISE LINUX WS 2.1 - Przewodnik Instalacji Strona 187