Oracle SPARC M8 Service Manual page 80

SPARC M8-8 and SPARC M7-8 Configurations and Failover Behavior (Two PDomains)
SPARC M8-8 and SPARC M7-8 Configurations and Failover
Behavior (Two PDomains)
In a SPARC M8-8 or a SPARC M7-8 server that is configured with two PDomains, each
static PDomain consists of four of the eight CMIOUs in the chassis; one PDomain consists of
cmiou0-cmiou3, the other consists of cmiou4-cmiou7.
Two service processors (SP0 and SP1) achieve redundancy with two SPMs each that are
assigned to different static PDomains. SPM0 on each SP manages one static PDomain (DCU_0) in
the chassis, while SPM1 on each SP manages the other static PDomain (DCU_1).
DCU Managed
DCU_0
DCU_1
Oracle ILOM identifies one of the SPMs from each SP as the Active SP to manage activity on
the static PDomain. The other SPM on the SP runs Oracle ILOM, but remains inactive unless
the Active SP can no longer manage the hardware. In this case, the inactive SPM assumes the
Active SP role.
You cannot specify which SPMs will serve as the Active SP, but you can request that Oracle
ILOM should assign a new SPM to serve each role. You might do this when, for example, you
are replacing an SP.
Related Information
"Determine Which SP Is Managing System Activity" on page 123
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"Change Which SP Is Managing System Activity" on page 124
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"Oracle ILOM Paths for SPMs" on page 122
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80 SPARC M8 and SPARC M7 Servers Service Manual • September 2017
CMIOUs Assigned
CMIOU_0–CMIOU_3
CMIOU_4–CMIOU_7
Assigned SPM Pairs
/SYS/SP0/SPM0
/SYS/SP1/SPM0
/SYS/SP0/SPM1
/SYS/SP1/SPM1