RAM Swap from L- to N-Class possible?

[Ralph Grothe]

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

[spex]

Hi Ralph,

You may have better luck asking in the 9000 forum.

PCS

[Pete Randall]

Ralph,

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


Pete

[nanan]

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.]

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

[Ralph Grothe]

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?

[Pete Randall]

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

[sysadm_1 · Accepted solution]

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]

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.

[David Woodroffe]

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