Memory Install on V240

[ponetguy2]

Memory Install on V240
======================

I have a Sunfire v240 with 2G of memory. I would like to upgrade this machine to 4G. I have a couple
of 1G DIMMS available and I would like to install it on this v240. Each CPU has 4 slots and 2 slots per
CPU already has 512mb DIMMS installed (2G Memory).

Can I move the existing 512mb DIMMS on CPU1 to CPU0 (512mb x 4 = 2G on cPU0) and
install the two 1G DIMMS in CPU1 (1G x 2 = 2G on CPU1)? This way, both
CPUs will have equal ammount of memory. Please advise. I'm not much of a hardware guy

I found this install instructions on the v240 manual and it's a little vague on how I can add
more memory on the v240.

Install the first V240 DIMMs in CPU0 B0/D0 and B0/D1 or B1/D0 and B1/D1.

Rules:

1. DIMMS must be identical {VAGUE!!!}
2. Install two DIMMs at a time, per CPU
3. Maintain an equal amount of memory for each CPU {VAGUE!!!}
4. Use a minimum of two matched DIMMs per CPU
5. Do not mix DIMM capacities {VAGUE!!!}

prtdiag output:

------snip----------

============================ Memory Configuration ============================
Segment Table:
-----------------------------------------------------------------------
Base Address Size Interleave Factor Contains
-----------------------------------------------------------------------
0x0 1GB 1 BankIDs 0
0x1000000000 1GB 1 BankIDs 16

Bank Table:
-----------------------------------------------------------
Physical Location
ID ControllerID GroupID Size Interleave Way
-----------------------------------------------------------
0 0 0 1GB 0
16 1 0 1GB 0

Memory Module Groups:
--------------------------------------------------
ControllerID GroupID Labels Status
--------------------------------------------------
0 0 MB/P0/B0/D0
0 0 MB/P0/B0/D1
1 0 MB/P1/B0/D0
1 0 MB/P1/B0/D1

--------snip------------


"Not all OSs suck, it's just that some OSs suck worse than others"

 

[tuka]

Insure the two 1Gb DIMMs are identical (Manufacture, P/N).
If the two DIMMs' are identical then you can accomplish this task.

Place all Four 512MB DIMMs into CPU 0's four slots.

Place the two 1GB DIMMS into CPU 1 bank 0's two slots.

 

[ponetguy2]

thank you tuka. i needed the reassurance.

"Not all OSs suck, it's just that some OSs suck worse than others"

 

[tuka]

Just to add.

You will not get the best(optimal performance) memory interleaving with this memory configuration but it will work.

I have V240s with mixed 512MB and 1GB DIMMs (all slots populated).

 

[ponetguy2]

when i get another set of 1G dimms, i'll fix that problem.

"Not all OSs suck, it's just that some OSs suck worse than others"

 

[ponetguy2]

hello tuka,

out of curiosity, how did you setup your v240's memory?

what would you recommend with my current situation?

"Not all OSs suck, it's just that some OSs suck worse than others"

 

[tuka]

I have a qty of 4 V240

Three of the v240 (two cpu)are populated with 512Mb DIMMS with an interleave factor of 4.

The other V240 is populated with 512MB DIMMs in one CPU and
two 1GB DIMMs on the other cpu. This is the config type you were considering.

You get the best interleave factor when all the DIMMs' slots are occupied with the same size. Also insure the
vendor, type and speed are the same.

 

[ponetguy2]

thank you tuka.

here is what i came up with after i installed the two 1GB DIMMS:

============================ Memory Configuration ============================
Segment Table:
-----------------------------------------------------------------------
Base Address Size Interleave Factor Contains
-----------------------------------------------------------------------
0x0 2GB 2 BankIDs 0,1
0x1000000000 2GB 4 BankIDs 16,17,18,19

Bank Table:
-----------------------------------------------------------
Physical Location
ID ControllerID GroupID Size Interleave Way
-----------------------------------------------------------
0 0 0 1GB 0,1
1 0 0 1GB
16 1 0 512MB 0,1,2,3
17 1 1 512MB
18 1 1 512MB
19 1 0 512MB

Memory Module Groups:
--------------------------------------------------
ControllerID GroupID Labels Status
--------------------------------------------------
0 0 MB/P0/B0/D0
0 0 MB/P0/B0/D1
1 0 MB/P1/B0/D0
1 0 MB/P1/B0/D1
1 1 MB/P1/B1/D0
1 1 MB/P1/B1/D1



"Not all OSs suck, it's just that some OSs suck worse than others"