UPDATE:
Well that escalated quickly.
Turns out the T5120 is an octacore, but there seems to be a fault which causes it to only see 4 cores and half the RAM.
I've searched and tried to clear the fault from ILOM / ALOM but still get the "ERROR: Operating with a degraded memory configuration." output from show faulty.
Been a long time since I use Solaris and it was version 10.
I don't recall having to deal with roles back then. I have a LSI SAS 9240-8i flashed to 9211 from a few years back. Everyone using ZFS was doing that to these cards to make their disks JBODs for much faster I/O, but they were all doing it on x64 if I recall correctly.
I'll try that card once I manage to get all CPUs and RAM going....I've read nasty posts about this series not recognizing all RAM unless sticks are same part number and even down to same lot.
PS. I had forgotten how long Slowlaris takes to boot!
UPDATE 2: Rebooted and all 64 threads and the full 16GB of RAM are now seen in Solaris.
