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7-8 SPARC Enterprise M8000/M9000 Servers Service Manual • June 2010
7.2 Active Replacement and Hot
Replacement
The active replacement procedure and hot replacement procedure are almost the
same. This section explains both procedures together. Each step that is different
between these procedures is distinguished by "Active replacement" or "Hot
replacement" as a header. The main difference between active replacement and hot
replacement is as follows:
■ Active replacement: The CMU of an IOU is disconnected from or configured into
a domain by dynamic reconfiguration (DR).
■ Hot replacement: A domain must be stopped and restarted.
The procedure for active replacement and hot replacement is as follows.
1. Unlock and open a door of the server.
For details, see Chapter 5.
Caution – Before touching IOU or the dummy (filler) unit, see Section 1.4,
“Antistatic Precautions” on page 1-6 and be sure to wear the antistatic wrist strap.
Failure to do so might result in serious damage to operating domains.
2. Check whether the CMU that is connected to the IOU to be replaced (the target
CMU) is logically divided and what domains are affected by the replacement.
a. Log in to the XSCF from a terminal connected to the XSCF, and execute the
showfru command to check whether the target CMU is logically divided.
b. If it is logically divided, execute the showdcl command to check whether
the target CMU and another CMU comprise a domain.
c. Execute the showboards command to check the use states of the devices and
resources in the CMU.
For details on how to log in to the XSCF and of commands, see the SPARC
Enterprise M3000/M4000/M5000/M8000/M9000 Servers XSCF User’s Guide. For
details of commands, see also the SPARC Enterprise
M3000/M4000/M5000/M8000/M9000 Servers XSCF Reference Manual, or the man
page.