Digital Equipment DEC 10000, Руководство по обслуживанию

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Servicing the CPU 2-11
There are at least two factors to consider when adding or replacing a CPU:
1. The desire to retain the system environment.
2. The possibility that the new CPU is at a higher firmware revision
than other CPUs in the system.
2
shows the mismatch message
should the firmware differ between CPUs. In this case the newer sec-
ondary has a higher firmware revision than the older primary.
The procedure described here takes these into consideration.
After you have removed and replaced the defective CPU following the in-
structions in Chapter 1, take the following steps:
1. Power up the system. If self-test fails, refer to the appropriate
Ad-
vanced Troubleshooting manual; otherwise continue.
2. Note the firmware revision of the primary CPU.
3. Use the
update -e
command to copy the EEPROM environment vari-
ables from the primary processor to the new secondary. (The
update
-e
command copies the system serial number and other parameters
that can be set, as well as any additional information stored in the
EEPROM to the target CPU.)
4. Use the
set cpu
command to connect the console terminal to the new
CPU.
5. If there is a firmware revision mismatch, you will want to update the
FEPROMs on the older CPUs. Since you are already running the con-
sole from the newest CPU, use the
update -f
command. Note that if
there are several CPUs that need updating, you can use a wildcard to
target them all, as in
update -f kn7aa*.
6. Use the
set eeprom field
command to enter the 8-digit LARS number
and a short message (up to 68 characters), stating the date and reason
for service, into the EEPROM.
7. Boot the system and return control to the customer.
NOTE: If the customer used the
set cpu_primary
command to change the
default which allows all CPUs in the system to become the pri-
mary, the
set cpu
command may not work.
To allow all CPUs in the system to become the primary processor, use the
set cpu_primary ff
command. Modify the
cpu_primary
environment
variable to the customer setting after performing the updates.