R900 RAM Configuration

Nick Lunt nick.lunt at patech-solutions.com
Thu Mar 25 03:53:59 CDT 2010




> -----Original Message-----
> From: Jens_Heinz at Dell.com [mailto:Jens_Heinz at Dell.com]
> Sent: 25 March 2010 08:49
> To: Nick Lunt
> Cc: linux-poweredge at lists.us.dell.com
> Subject: RE: R900 RAM Configuration
> 
> You have 4x memory risers named A, B, C, D.
> Every riser is capable to hold up to 8x DIMMs (ie. A1, A2, ... A8)
> That makes a total of 32x DIMMs in your system. In other words your
> system is full.
> 
> If you swap DIMM A1 you'll have to swap B1, C1 and D1 as well.
> For optimum configuration you shouldn't mix DIMMs of different sizes.
> 
> So one solution might be, to remove all 2GB DIMMs, fill up first 4x
> slots of every with 8GB DIMMs. That'll leave you spare slot to expand
> further in future.
> Or you just replace all your 2GB DIMMs with 4GB DIMMs.
> 
> Jens
> 
> -----Original Message-----
> From: Nick Lunt [mailto:nick.lunt at patech-solutions.com]
> Sent: 25 March 2010 09:37
> To: Heinz, Jens
> Cc: linux-poweredge-Lists
> Subject: RE: R900 RAM Configuration
> 
> > -----Original Message-----
> > From: Jens_Heinz at Dell.com [mailto:Jens_Heinz at Dell.com]
> > Sent: 24 March 2010 15:19
> > To: Nick Lunt
> > Subject: RE: R900 RAM Configuration
> >
> > This link might help
> >
> >
>
http://support.dell.com/support/edocs/systems/per900/en/hom/_sectioc.ht
> > m
> > #wp1082885
> >
> > Jens
> >
> > -----Original Message-----
> > From: linux-poweredge-bounces at dell.com
> > [mailto:linux-poweredge-bounces at dell.com] On Behalf Of Nick Lunt
> > Sent: 24 March 2010 16:09
> > To: linux-poweredge-Lists; linux-poweredge-Lists
> > Subject: R900 RAM Configuration
> >
> > Hi
> >
> > we have an R900 with 32 x 2GB DIMMs in, so the server has no free
> DIMM
> > slots.
> > All the DIMMs are DDR2 FB-DIMM-SYNCHRONOUS .
> >
> > We need to increase the RAM from 64GB to a minimum of 103GB (based
on
> > our calculations), so really I guess we'd be looking at increasing
> the
> > RAM to 104GB, or just going for a nice round 128GB :)
> >
> > Can anyone recommend the best upgrade method for this ?
> > Do we need to keep RAM in banks all the same size ?
> > How many DIMMs are in each bank ?
> >
> > Basically is there anything we need to be aware of when removing
some
> > DIMMs and adding larger ones ?
> 
> Right, that doc says 4 risers must be installed at all times.
> Seen as we have 32 DIMMs does that mean we have 8 risers ?
> I.e. A1,B1,C1,D1 is a full riser. A1,B2,C2,D2 is another riser, etc ?
> 
> Status: OK	DIMM A1 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM B1 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM C1 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM D1 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM A2 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM B2 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM C2 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM D2 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM A3 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM B3 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM C3 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM D3 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM A4 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM B4 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM C4 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM D4 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM A5 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM B5 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM C5 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM D5 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM A6 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM B6 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM C6 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM D6 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM A7 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM B7 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM C7 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM D7 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM A8 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM B8 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM C8 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> Status: OK	DIMM D8 	DDR2 FB-DIMM-SYNCHRONOUS	2048 MB
> 
> So if I changed A1 to a 4GB DIMM then I should change A2, A3, A4, A5,
> A6, A7 and A8 to 4GB DIMMs too ?


Thanks Jens, I think I've got it now :)

Cheers
Nick.

 

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