Diagnostic Routine That Runs At Startup (Ibist) Might Accidentally Disconnect The Mcu (Cr 6618773) - Fujitsu SPARC Enterprise T5120 Product Notes

Diagnostic Routine That Runs at Startup (IBIST)
Might Accidentally Disconnect the MCU (CR
6618773)
This issue is resolved by updating the system firmware to 7.1.0.g or later.
In some cases, the MCU is disconnected from corresponding DIMM modules and
CPU cores, and the following messages are reported to the console.
For example:
Chassis | major: Host has been powered on
Chassis | major: Dec 19 08:45:11 ERROR: MB/CMP0/MCU2 Failed IBIST,
disabled
Fault | critical: SP detected fault at time Wed Dec 19 08:45:12
2007. /SYS/MB/CMP0/MCU2 Forced fail (IBIST)
Chassis | major: Dec 19 08:45:13 ERROR: MB/CMP0/MCU3 unused because
MB/CMP0/MCU2 is not configured
Chassis | major: Dec 19 08:45:13 ERROR: MB/CMP0/L2_BANK4,
MB/CMP0/L2_BANK5 unused because MB/CMP0/MCU2 is not configured
Chassis | major: Dec 19 08:45:13 ERROR: MB/CMP0/L2_BANK6,
MB/CMP0/L2_BANK7 unused because MB/CMP0/MCU3 is not configured
Chassis | major: Dec 19 08:45:13 ERROR: Degraded configuration:
system operating at reduced capacity
Chassis | major: Dec 19 08:45:13 ERROR: System DRAM Available:
008192 MB
Chassis | major: Dec 19 08:45:13 ERROR: Only 4 cores, up to 32 cpus
are configured because some L2_BANKS are unusable
Workaround: Install Patch 127580-04 or later, and update the System Firmware to
version 7.0.9 or later.
Appendix A Fixed Issues 105