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rx7640 MEM Upgrade error

 
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John Kelly_3
Regular Advisor

rx7640 MEM Upgrade error

Hi, I had third party engineers in our Datacentre to upgrade the RAM in an rx7640. When it booted again I got the following chassis log error (although the RAM all seems to be there)

5195 SFW 0,1,0 *5 a480043210e0177b 00ffff01ff4aff74 MEM_DIMM_LOAD_ORD_ERR
5195 01/27/2008 17:58:36

I can't see any mention of it on the internet. Any suggestions?
6 REPLIES 6
Dennis Handly
Acclaimed Contributor

Re: rx7640 MEM Upgrade error

>When it booted again I got the following chassis log error MEM_DIMM_LOAD_ORD_ERR

(Why did you let them go before you rebooted? :-)
It seems the DIMMs weren't loaded in the right order.
John Kelly_3
Regular Advisor

Re: rx7640 MEM Upgrade error

(why did you let them go before you rebooted)
Tell me about it. They wouldn't stay. But that's another issue.

Do you know anything about what 'order' is required?
VK2COT
Honored Contributor
Solution

Re: rx7640 MEM Upgrade error

Hello,

Here are the memory loading rules for RX7640:

a) Memory must be installed in pairs
(two DIMMs of equal size);

b) Minimum memory is 2 GB per cell (RX7640
can have up to two cells);

c) Larger DIMMs must be loaded first across
a cell, followed by progressively smaller
DIMMs;

d) On each cell board, memory pairs must be
installed in the following order:

(0A, 0B), (1A, 1B), (2A, 2B), (3A, 3B),
(4A, 4B), (5A, 5B), (6A, 6B), (7A, 7B)

e) DIMM mixing other than recommended
configurations is supported as long as
memory loading rules are followed.

f) Load memory equally across the available
cell boards;

g) For best performance, a cell should
be configured with a multiple of eight
DIMMs or four pairs (although the server
will work with an odd number of pairs).
It takes eight DIMMs to populate both
memory buses. If only one memory bus is
populated, the cell board will deliver half
the peak memory bandwidth.

Cheers,

VK2COT
VK2COT - Dusan Baljevic
Tim Nelson
Honored Contributor

Re: rx7640 MEM Upgrade error


Memory loading rules are typically printed on the chassis cover.

Here also is a note about 4GB DIMM issues as well as proper DIMM load order.

http://docs.hp.com/en/AB322-96001/AB322-96001.pdf

John Kelly_3
Regular Advisor

Re: rx7640 MEM Upgrade error

Yep, here is the problem...

DIMM Location Size(MB) State Serial Num Part Num
-------------------- -------- ------- ---------------- ------------------
Cab 0 Cell 1 DIMM 0A 4096 Config PRY06504AN A9849-60301
Cab 0 Cell 1 DIMM 0B 4096 Config PRY065058U A9849-60301
Cab 0 Cell 1 DIMM 1A 4096 Config PRY06474S1 A9849-60301
Cab 0 Cell 1 DIMM 1B 4096 Config PRY06474S3 A9849-60301
Cab 0 Cell 1 DIMM 2A 4096 Config PRY06504AM A9849-60301
Cab 0 Cell 1 DIMM 2B 4096 Config PRY06503PA A9849-60301
Cab 0 Cell 1 DIMM 3A ---- ---- ---- ----
Cab 0 Cell 1 DIMM 3B ---- ---- ---- ----
Cab 0 Cell 1 DIMM 4A 4096 Config PRY07513TT A9849-60301
Cab 0 Cell 1 DIMM 4B 4096 Config PRY075086B A9849-60301
Cab 0 Cell 1 DIMM 5A 4096 Config PRY07510GS A9849-60301
Cab 0 Cell 1 DIMM 5B 4096 Config PRY075139U A9849-60301
Cab 0 Cell 1 DIMM 6A ---- ---- ---- ----
Cab 0 Cell 1 DIMM 6B ---- ---- ---- ----
Cab 0 Cell 1 DIMM 7A ---- ---- ---- ----
Cab 0 Cell 1 DIMM 7B ---- ---- ---- ----

I'm getting them back in tonight to fill them in the correct order.
John Kelly_3
Regular Advisor

Re: rx7640 MEM Upgrade error

All in order now. Thanks for the quick responses and apposite info.