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Re: O2 crashes on boot


[again, sorry for the long delay, but I'm sure you won't like to hear
all the reasons...]
>> It definitely matters at the moment.  I put in some more RAM into my
>> O2 last year and it failed to boot.  When I changed the modules so the
>> bigger modules were first, it worked again.
> From what I remember this is a classic thing with SGI architecture. I 
>think there are even recommendations to do this with the larger memory 
>modules first in order. This was also true of the larger Origin 200 and 
>2000 series of machines.

Alright, I finally found the time to dig a bit deeper. My Memory is:

2x128 MB SGI labeled (DIMM sockets 1 & 2)
2x32 MB third party (DIMM sockets 3 & 4)
2x32 MB third party (DIMM sockets 5 & 6)
2x32 MB SGI labeled (DIMM sockets 7 & 8)

If I take out the SGI labeled 2x32 MB, the box boots:

Linux version 2.6.18-4-r5k-ip32 (Debian 2.6.18.dfsg.1-11) (waldi@debian.org) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 Wed Feb 21 16:43:49 UTC 2007
PROMLIB: ARC firmware Version 1 Revision 10
CRIME id a rev 1 at 0x0000000014000000
CRIME MC: bank 0 base 0x0000000000000000 size 128MiB
CRIME MC: bank 1 base 0x0000000008000000 size 128MiB
CRIME MC: bank 2 base 0x0000000050000000 size 32MiB
CRIME MC: bank 3 base 0x0000000052000000 size 32MiB
CRIME MC: bank 4 base 0x0000000054000000 size 32MiB
CRIME MC: bank 5 base 0x0000000056000000 size 32MiB
CPU revision is: 00002321
FPU revision is: 00002310
Determined physical RAM map:
 memory: 0000000010000000 @ 0000000000000000 (usable)
 memory: 0000000008000000 @ 0000000050000000 (usable)
Initial ramdisk at: 0xffffffff804c0000 (2909061 bytes)
Built 1 zonelists.  Total pages: 360448

If I put them back in, booting fails, regardless if I put them in sockets
7 & 8 or 3 & 4. As they look a bit different, my suspicion is that the
internal organisation of the SGI 32 MB modules differs from the organisation
of the third party modules. But that's just a guess,

Dipl. Inf. Ulrich Teichert|e-mail: Ulrich.Teichert@gmx.de | Listening to:
Stormweg 24               |Der Weisse Raum (Der Dritte Mann), Caligari
24539 Neumuenster, Germany|(Opération S), Looking For Action (Ghetto Ways)

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