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RAM Swap from L- to N-Class possible?

 
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Ralph Grothe
Honored Contributor

RAM Swap from L- to N-Class possible?

Hello,

I need to clone an L-Class server onto an N-Class server.
Despite the model differences I hope this is posible with Ignite?

Both boxes have 16 GB RAM but the L-Class uses larger sized DIMMs of 1 GB whereas the N-Class uses 512 MB sized DIMMs.
Thus, I was asked by application admins (SAP) if we could put more RAM into the N-Class by swapping around a bit with the DIMMs.
So is it possible to replace some of the 512 MB DIMMs of the N-Class by some of the L-Class'es 1 GB DIMMs?

Here's the bank layout of the L-Class
(hope it is readable enough for I checked the "Retain format" checkbox in the form.


Basic Memory Description

Module Type: MEMORY
Total Configured Memory : 16384 MB
Page Size: 4096 Bytes

Memory interleaving is supported on this machine and is ON.

Memory Board Inventory

Extender
Slot Num Configured and Slot label for each DIMM (MB)
-------- --------------------------------------------
0a 2a 1a 3a 3b 1b 2b 0b
---- ---- ---- ---- ---- ---- ---- ----

EXT 0 1024 1024 1024 1024 1024 1024 1024 1024
EXT 1 1024 1024 1024 1024 1024 1024 1024 1024
------------------------------------------------------
System Total (MB): 16384




And here's the bank layout of the N-Class


asic Memory Description

Module Type: MEMORY
Total Configured Memory : 16384 MB
Page Size: 4096 Bytes

Memory interleaving is supported on this machine and is ON.

Memory Board Inventory

Extender
Slot Num Configured and Slot label for each DIMM (MB)
-------- --------------------------------------------
0a 2a 1a 3a 3b 1b 2b 0b
---- ---- ---- ---- ---- ---- ---- ----

EXT 0 512 512 512 512 512 512 512 512
EXT 1 512 512 512 512 512 512 512 512
EXT 2 512 512 512 512 512 512 512 512
EXT 3 512 512 512 512 512 512 512 512
------------------------------------------------------
System Total (MB): 16384
Madness, thy name is system administration
13 REPLIES 13
spex
Honored Contributor

Re: RAM Swap from L- to N-Class possible?

Hi Ralph,

You may have better luck asking in the 9000 forum.

PCS
Pete Randall
Outstanding Contributor

Re: RAM Swap from L- to N-Class possible?

Ralph,

Part numbers for the memory are completely different between the L and the N - I doubt it's possible.


Pete

Pete
nanan
Trusted Contributor

Re: RAM Swap from L- to N-Class possible?

It is likely an impossible that you are asking.

Because Each system can use different DIMM and SIMM even same size RAM.

here the Part NO

N-class
512 MB MEMORY SIMM A4923-69101
1 GB MEMORY SIMM A5864-69001

L-class
1024 MB MEMORY DIMM A6115-69001


check you RAM part NO


Jaime Bolanos Rojas.
Honored Contributor

Re: RAM Swap from L- to N-Class possible?

Ralph,

I was checking a few moments ago, and it looks like the parts numbers for memory on the N-class are different than the L-class.

Regards,

Jaime
Work hard when the need comes out.
Ralph Grothe
Honored Contributor

Re: RAM Swap from L- to N-Class possible?

Thanks for the quick responses.
Err, how do I identify the DIMMs' prod Nos.?
The cstm map info for memory isn't showing.
This is what I found in mstm beneath the system map, it looks as if it refers to a RAM DIMM.

So this is from the L-Class
seems to carry A5864-60002 DIMMs



FRU Handle: 0xb

FRU Physical Location: 0x0000ff00012aff74
FRU Source = 7 (memory)
Source Detail = 4 (SIMM or DIMM)
Cabinet Location = 0
Card Cage Location = 0
Cell Location = 0
Extender Location = 1
DIMMS Rank = 42

FRUID Field ascii hex
----------- ----- ---
FRU Name.............: DIMM_1024 0x20202020 20202044 494d4d5f 31303234
Part Number..........: A5864-60002 0x41353836 342d3630 303032
Serial Number........: A56E04835838 0x41353645 30343833 35383338
Engineering Date Code: 4105 0x34313035
Art Work Revision....: A4 0x4134
Scan Revision........: 0x0000
FRUID Definition Rev.: A 0x41
FRU Specific Info....: 0x20202020 20202020 20202020 20202020


Where this is from the system map of the N-Class,
which seems to carry A4923-60001 DIMMs


FRU Handle: 0xc

FRU Physical Location: 0x0000ff00020aff74
FRU Source = 7 (memory)
Source Detail = 4 (SIMM or DIMM)
Cabinet Location = 0
Card Cage Location = 0
Cell Location = 0
Extender Location = 2
DIMMS Rank = 10

FRUID Field ascii hex
----------- ----- ---
FRU Name.............: DIMM_512 0x20202020 20202020 44494d4d 5f353132
Part Number..........: A4923-60001 0x41343932 332d3630 303031
Serial Number........: A56E01673278 0x41353645 30313637 33323738
Engineering Date Code: 3913 0x33393133
Art Work Revision....: A3 0x4133
Scan Revision........: 0x0000
FRUID Definition Rev.: A 0x41
FRU Specific Info....: 0x20202020 20202020 20202020 20202020





How do I know if
A5864-60002 and A4923-60001 merge?

Madness, thy name is system administration
Pete Randall
Outstanding Contributor

Re: RAM Swap from L- to N-Class possible?

The fact that the part numbers are different tells me that they aren't going to "merge". It's always been my experience that HP has a habit of making parts unique, even between two very similar servers.


Pete

Pete
sysadm_1
Valued Contributor
Solution

Re: RAM Swap from L- to N-Class possible?


ENter the memory part number in
http://www.partsurfer.hp.com/cgi-bin/spi/main
This will show the compatible servers for this part.


-sysadm
Ralph Grothe
Honored Contributor

Re: RAM Swap from L- to N-Class possible?

The cgi @ partsurfer is great.
I didn't know it.
But when I enter the part No. of the L-Class DIMM I am only served a table with a half broke n link identified as 2 GB SDRAM update kit.
Whereas when I take the N-Class DIMM's part No. the resulting table contains links to N-Class and rp7400 servers.
This seems to be in accordance with all your answers and indicate that the parts are unfortunately not mergeable.
Madness, thy name is system administration
David Woodroffe
Frequent Advisor

Re: RAM Swap from L- to N-Class possible?

Hi Ralph,
Just as a point of interest. I have a memory chip in an L class which cstm tell me is a DIMM_256 part number A3763. If you look this up on partsufer as A3763A it says it is for an N class. It seems to work fine and has been installed for years. I don't know how this happened. It is only a 256MB chip but .....?
David