Originally posted by: SystemAdmin

We have a couple of System P5 550Q servers(model 9133-55A). They have 8 GB of memory each.
Now the need arose to upgrade memory.
The IT manager told me that we cannot upgrade, because the boxes configured in such a way that
they will not use more then 8 GB, the only possibility is to change processor card.
According to redbook - each processor card can have up to 32GB, imb.com site has memory upgrade page for
this server.
I wonder if this can be true?
Main reason the manager gave me is "we bought used equipment".
Maybe it is used, but we bought it from official IBM reseller.

Thanks, Vlad.
#AIX-Forum

Originally posted by: laff

Hi,
it depends... on what kind of Memory DIMM's 're used. 1 GB or 2 GB per DIMM
The amount of slots for inserting the memory DIMM ..times .. the kind of Memory DIMM - > is the maximum Memory.. .

So it can be, that every slot is already in use, so you can not upgrate until you recycle some used DIMMs ...

hope this helps..
cheers
#AIX-Forum

Originally posted by: CRM

The 550Q could have one or two books I seem to recall and each book could have 8 DIMM slots:

http://www.redbooks.ibm.com/abstracts/redp4138.html?Open

You can check the number of processors from lparstat -i, for example on a 570 I have here:

Maximum Physical CPUs in system : 16
Active Physical CPUs in system : 12
Active CPUs in Pool : 12
You can check the number of DIMMs by running lscfg -vp |grep DIMM from an AIX command line, this will tell you the size of the DIMMS and the number, for example on my 12 way 570 I have 8 DIMM slots per processor card and I have 6 processor cards, so I have 48 slots available. If I want to know what is being used:

lscfg -vp |grep -p DIMM

Memory DIMM:
Record Name.................VINI
Flag Field..................XXMS
Hardware Location Code.........
Customer Card ID Number........
Serial Number..................
Part Number....................
FRU Number.................. ...
Size........................1024
Version.....................RS6K
Physical Location: .......

(Some information blanked above)

Here you can see I have a 1024 Sized DIMM and if I count them up:

lscfg -vp |grep DIMM |wc -l
32

So I have 32 1GIG dimms installed, I have 48 slots in total so I can install an additional 16 DIMMs (but I might need to follow pairing rules etc).

If you repeat the above you should be able to tell what you do and do not have.

regards

Chris
#AIX-Forum