[powerstation-owners] Upgrading memory

[Mel Gorman]

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.
> 
>        /*
>          * check DIMM compatibility
>          * configuration is 128 bit data/128 bit bus
>          * -all DIMMs must be organized as x4
>          * -all DIMMs must be 72 bit wide with ECC
>          * -all DIMMs must be registered DIMMs (RDIMMs)
>          * -paired DIMMs must have the same # of ranks, size & organization
>          */
> 
> [...]
> 
>         /*
>          * check valid DIMM organisation (must be x4)
>          */
>         e = 0;
>         for( i = 0; i < m_dcnt_u32; i++ ) {
> 
>                 if( ( m_dptr[i]->m_orgmsk_u32 & DIMM_ORG_x4 ) == 0 ) {
>                         #ifdef U4_DEBUG
>                         printf( "\r\n  [ERROR -> wrong DIMM organisation in bank %u]",
>                                 m_dptr[i]->m_bank_u32 );
>                         #endif
>                         e++;
>                 }
> 
>         }

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.


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