Messages in this thread | | | Date | Thu, 6 May 1999 09:18:12 +0200 | From | Harald Koenig <> | Subject | Re: Oops assist... |
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On May 05, Dan Hollis wrote:
> On Wed, 5 May 1999, Olaf Titz wrote: > > > Even more ideal would be to dump the oops to somewhere non volatile over > > > a reboot. I'm not sure there are good candidates for this on a PC. > > SunOS thinks the swap disk is a good one (for making crash dumps of > > the whole system actually). If code in the boot scripts checks for a > > crash-dump signature on the primary swap disk _before_ swapon'ing it, > > this could be easily accessed (i.e. written elsewhere). > > SGI preserves ram on a reboot, unlike some PC BIOS which scribbles all > over RAM on a reboot. So SGI can do a 100% safe crashdump by dumping after > the system has been reset. Anyone know a PC BIOS which doesnt mangle RAM?
at least on cold power-on you first have to write something to RAM to initialize the parity bit(s). if you try to read RAM first, odds are 50% that the parity bit is wrong and you'll get an NMI...
Harald -- All SCSI disks will from now on ___ _____ be required to send an email notice 0--,| /OOOOOOO\ 24 hours prior to complete hardware failure! <_/ / /OOOOOOOOOOO\ \ \/OOOOOOOOOOOOOOO\ \ OOOOOOOOOOOOOOOOO|// Harald Koenig, \/\/\/\/\/\/\/\/\/ Inst.f.Theoret.Astrophysik // / \\ \ koenig@tat.physik.uni-tuebingen.de ^^^^^ ^^^^^
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