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Memory deconf in rx8640

 
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cartman_2
Frequent Advisor

Memory deconf in rx8640

Hi,

We have a rx8640 server that has 4 dimms deconfigured, after a couple of panics/mcas.

DIMM Location Size(MB) State Serial Num Part Num
-------------------- -------- ------- ---------------- ------------------
Cab 0 Cell 3 DIMM 0A 2048 Deconf PR A9846-60301
Cab 0 Cell 3 DIMM 0B 2048 Deconf PR A9846-60301
Cab 0 Cell 3 DIMM 1A 2048 Config PR A9846-60301
Cab 0 Cell 3 DIMM 1B 2048 Config PR A9846-60301
Cab 0 Cell 3 DIMM 2A 2048 Config PR A9846-60301
Cab 0 Cell 3 DIMM 2B 2048 Config PR A9846-60301
Cab 0 Cell 3 DIMM 3A 2048 Deconf PR A9846-60301
Cab 0 Cell 3 DIMM 3B 2048 Deconf PR A9846-60301
Cab 0 Cell 3 DIMM 4A 2048 Config PR A9846-60301
Cab 0 Cell 3 DIMM 4B 2048 Config PR A9846-60301
Cab 0 Cell 3 DIMM 5A 2048 Config PR A9846-60301
Cab 0 Cell 3 DIMM 5B 2048 Config PR A9846-60301
Cab 0 Cell 3 DIMM 6A ---- ---- ---- ----


We are going to replace the deconfigured dimms, my question is, is there a way to configure them from efi(ala cpuconfig) once we have changed them, or will they be configured by the system(if there are no errors) on next reboot?

should we also clear the pdt table just in case?


Thanks!
5 REPLIES 5
hvhari
Esteemed Contributor

Re: Memory deconf in rx8640

During next boot, system will test the memory again. You can verify the status after replacement via MP command Menu PS command to display cell and
DIMM status for the cell.
Regards,
Hari

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Torsten.
Acclaimed Contributor

Re: Memory deconf in rx8640

If you ave a downtime, run this from shell:

Shell> info mem


You will see a column "hardware deconfigured" and a "software deconfigured".

This means a hardware failure on a single DIMM will probably deconfigure other DIMMs as well.



Maybe you get the same result online:

# echo "selclass qualifier memory;info;wait;infolog" | /usr/sbin/cstm

Please try this.

Hope this helps!
Regards
Torsten.

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cartman_2
Frequent Advisor

Re: Memory deconf in rx8640

Yes, the mem output i posted in the first question is output from cstm. The doubt I had is if it was necessary to take more steps than just changing the memory, to re-enable it once the dimms are changed.

But there seems to be no mem config command in EFI, similar to cpuconfig for the cpus.

Torsten.
Acclaimed Contributor
Solution

Re: Memory deconf in rx8640

There is a EFI command for this, called "dimmconfig".

Do

Shell> help dimmconfig

for usage.

Shell> dimmconfig

MEMORY INFORMATION

Cab/ Total Active Failed SW Deconf HW Deconf
Cell Slot Mem Mem DIMMs DIMMs DIMMs Unknown
---- ----- --------- --------- ------ --------- --------- -------
0 0/0 16384 MB 16384 MB 0 0 0 0
1 0/1 16384 MB 16384 MB 0 0 0 0
2 0/2 16384 MB 16384 MB 0 0 0 0
3 0/3 16384 MB 16384 MB 0 0 0 0

Active Memory : 65536 MB
Interleaved Memory : 65472 MB
NonInterleaved Memory : 64 MB
Installed Memory : 65536 MB




dimmconfig -- Deconfigure/Reconfigure dimms

Hope this helps!
Regards
Torsten.

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those who understand binary, and those who don't.

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cartman_2
Frequent Advisor

Re: Memory deconf in rx8640

Torsten on spot!