Dimm Mismatch On Odd Numbered Pairs Results In Ddr Training Failed On Entire Branch (Cr7101624 And Cr7111545) - Oracle Sun Fire X4800 Product Notes

DIMM Mismatch on Odd Numbered Pairs Results in DDR Training Failed on Entire Branch (CR7101624 and CR7111545)

1. Run the following command to determine your enclosure number:
-pdlist -a0 | more
Adapter #0
Enclosure Device ID: 252
Slot Number: 0
Note -
2. Use the CfgLdAdd command to build RAID volumes for each disk. For example:
-CfgLdAdd -r0[252:0] -a0
-CfgLdAdd -r0[252:1] -a0
-CfgLdAdd -r0[252:2] -a0
-CfgLdAdd -r0[252:3] -a0
Note -
commands.
DIMM Mismatch on Odd Numbered Pairs Results in
DDR Training Failed on Entire Branch (CR7101624 and
CR7111545)
If a DIMM mismatch error (size, rank, or speed) occurs on odd-numbered DIMM pairs, it might
cause a ddr-training-failed error on the entire branch, thus disabling all DIMMs on that
branch.
Furthermore, Oracle ILOM might not mark them as faulty or send a diagnostic message, but
only send one ereport on boot:
ereport.memory.mrc.init-no-memory@/sys/blX/pX/mrX
Workaround
Use the Oracle ILOM Fault Manager to view information about active faults (fmadm faulty) to
identify the mismatched DIMM pair.
34 Sun Fire X4800 Server Product Notes • July 2017
The typical enclosure number is 252, unless there are more than eight drive slots.
If your enclosure number is not 252, substitute your enclosure number in these