[powerstation-owners] Upgrading memory

[Mel Gorman]

On Sun, Nov 30, 2008 at 06:40:51PM +0100, Adrian Reber wrote:
> On Sun, Nov 30, 2008 at 01:55:17PM +0000, Mel Gorman wrote:
> > On Sat, Nov 29, 2008 at 12:25:30PM +0100, Adrian Reber wrote:
> > > On Fri, Nov 28, 2008 at 11:19:51AM +0000, Mel Gorman wrote:
> > > > This is an embarassingly stupid question but how is the memory meant to
> > > > be upgraded in these machines? I replaced the two old DIMMs with two of
> > > > what should be similar type;
> > > > 
> > > > 2 x 2GB 667MHz DDR2 P2-5300 ECC REG with Parity CL5, 240 pin Dual rank.
> > > > 
> > > > On boot-up, it says
> > > > 
> > > > JS2XBlade Starting
> > > >  Build Date = Jul 22 2008 17:16:18
> > > >  FW Version = JX-1.7.0-3
> > > >  Check ROM  = OK
> > > >  Press "s" to enter Open Firmware.
> > > > 
> > > > U4 DDR2 memory controller setup V2.1
> > > > ------------------------------------
> > > > > detected board              : BIMINI
> > > > > detected DIMM configuration : 
> > > >   [ERROR -> wrong DIMM organisation in bank 0]
> > > >   [ERROR -> wrong DIMM organisation in bank 0]
> > > > > initialization failure.
> > > > 
> > > > I haven't been able to find a motherboard manual to determine if anything
> > > > else is required for an upgrade, what the correct type of memory is or if
> > > > there is a specific part required.
> > > 
> > > I would assume you probably have "by 8" (x8) DIMMs, because looking at
> > > the code it says it only supports x4 DIMMS.
> 
> [...]
> 
> > Dirt, this is a bit of a kick but thanks for clarifying the situation and
> > limitation. Are there options other than buying more memory? I'm
> > guessing "no" but it doesn't hurt to ask.
> 
> What do you exactly mean with "options"? Options to use the memory which
> is not supported?

Yes.

> Looking at the CPC945 documentation it says it supports x4, x8 and x16
> DIMMs. Unfortunately I do not know why the code says it only supports x4
> DIMMs. So I would say buying more memory is your only option right now.
> 

Right, pretty painful but if it's what has to be done, I can live with
it. I'll try kicking around in IBM for a bit and see can I find an answer
but I suspect I'll get the same answer. Thanks for checking it out.

-- 
Mel Gorman
Part-time Phd Student                          Linux Technology Center
University of Limerick                         IBM Dublin Software Lab