
CMIOU Redundancy
Server
No. (Top
to Bottom)
Supported CMIOUs
DCU2
SPARC M7 CMIOUs
only
DCU1
SPARC M7 CMIOUs
only
DCU0
SPARC M7 CMIOUs
only
Related Information
■
“Understanding Server Configurations and Failover Behavior” on page 79
■
“CMIOU Configurations (SPARC M8-8 and SPARC M7-8 With Two
■
“CMIOU Configurations (SPARC M8-8 and SPARC M7-8 With One
■
“CMIOU Configurations (SPARC M7-16)” on page 85
CMIOU Redundancy
When installed in the proper slots, CMIOUs are designed to provide redundant access to the
SP. Always install two CMIOUs in the first two slots of a SPARC M8-8 and SPARC M7-8
PDomain or a SPARC M7-16
. Always follow these CMIOU configuration guidelines:
■
“CMIOU Configurations (SPARC M8-8 and SPARC M7-8 With Two
■
“CMIOU Configurations (SPARC M8-8 and SPARC M7-8 With One
■
“CMIOU Configurations (SPARC M7-16)” on page 85
For example, ensure that there are CMIOUs installed in slots
CMIOU_0
and
CMIOU_1
in a SPARC
M8-8 server with one PDomain. In this example, if one of the CMIOUs has faulted, the
PDomain will still be able to access the SP through the other CMIOU.
If there is only one CMIOU is installed a PDomain or DCU, the communication link between
the SP and the PDomain will be lost if the CMIOU faults or is taken offline. For example, if a
SPARC M8-8 server with one PDomain contains one CMIOU installed in CMIOU_0, and that
CMIOU goes offline or faults, the communication link between the Active SP and the CMIOU
also goes down. In this example, the FMA fault information will not be synchronized between
the Active SP and the PDomain host, the
prtdiag
command will not display environmental
information, and the Oracle VM Server for SPARC software cannot save or read saved
configuration information saved on the SP. Additionally, if the boot pool devices are on the
CMIOU, the PDomain host might not be able to boot the Oracle Solaris OS.
88
SPARC M8 and SPARC M7 Servers Service Manual • September 2017
Summary of Contents for SPARC M7
Page 1: ...SPARC M8 and SPARC M7 Servers Service Manual Part No E55215 06 September 2017 ...
Page 2: ......
Page 12: ...12 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...
Page 14: ...14 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...
Page 34: ...34 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...
Page 66: ...66 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...
Page 78: ...78 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...
Page 116: ...116 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...
Page 140: ...140 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...
Page 188: ...188 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...
Page 216: ...216 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...
Page 226: ...226 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...
Page 234: ...234 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...
Page 242: ...242 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...
Page 252: ...252 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...
Page 268: ...268 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...
Page 296: ...296 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...
Page 316: ...316 SPARC M8 and SPARC M7 Servers Service Manual September 2017 ...