FUJITSU SPARC M4000 - Manual (Page 176)

2-120 SPARC Enterprise Mx000 Servers XSCF User’s Guide • April 2008
A mix of SPARC64 VI and SPARC64 VII processors can be mounted on a single
CMU, as shown in CMU#2 and CMU#3 in
FIGURE 2-8 . And a single domain can be
configured with a mix of these SPARC64 processors, as shown in Domain 2 in
FIGURE 2-8 .
A SPARC Enterprise M4000/M5000/M8000/M9000 server domain runs in one of the
following CPU operational modes:
■ SPARC64 VI Compatible Mode – All processors in the domain – which can be
SPARC64 VI processors, SPARC64 VII processors, or any combination of them –
behave like and are treated by the OS as SPARC64 VI processors. The new
capabilities of SPARC64 VII processors are not available in this mode. Domains 1
and 2 in
FIGURE 2-8 correspond to this mode.
■ SPARC64 VII Enhanced Mode – All boards in the domain must contain only
SPARC64 VII processors. In this mode, the server utilizes the new features of
these processors. Domain 0 in
FIGURE 2-8 corresponds to this mode.
To check the CPU operational mode, execute the prtdiag (1M) command on the
Solaris OS. If the domain is in SPARC64 VII Enhanced Mode, the output will display
SPARC64
-VII on the System Processor Mode line. If the domain is in SPARC64 VI
Compatible Mode, nothing is displayed on that line.
By default, the Solaris OS automatically sets a domain’s CPU operational mode each
time the domain is booted based on the types of processors it contains. It does this
when the cpumode variable – which can be viewed or changed by using the
setdomainmode
(8) command – is set to auto.
You can override the above process by using the setdomainmode(8) command to
change the cpumode from auto to compatible, which forces the OS to set the CPU
operational mode to SPARC64 VI Compatible Mode on reboot. To do so, power off
the domain, execute the setdomainmode(8) command to change the cpumode
setting from auto to compatible, then reboot the domain.
DR operations work normally on domains running in SPARC64 VI Compatible
Mode. You can use DR to add, delete or move boards with either or both processor
types, which are all treated as if they are SPARC64 VI processors.
DR also operates normally on domains running in SPARC64 VII Enhanced Mode,
with one exception: You cannot use DR to add or move into the domain a system
board that contains any SPARC64 VI processors. To add a SPARC64 VI processor
you must power off the domain, change it to SPARC64 VI Compatible Mode, then
reboot the domain.
In an exception to the above rule, you can use the DR addboard(8) command with
its -c reserve or -c assign option to reserve or register a board with one or
more SPARC64 VI processors in a domain running in SPARC64 VII Enhanced Mode.
The next time the domain is powered off then rebooted, it comes up running in
SPARC64 VI Compatible Mode and can accept the the reserved or registered board.