Thank you John, for your considerate and informative reply. I will review the article you referenced. BTW, the Sawtooth has not had a kernel panic since I removed all but the one stick of PC 133 memory--about 24 hours now. On Sep 20, 2005, at 1:46 PM, John Baltutis wrote: > On 09/19/05, Wayne Clodfelter <wayne at troutnc.com> wrote extensively > about > KPs, suspect RAM, and ended with: > >> >> So my question(s) to the list (are): >> Is the RAM the primary suspect? >> > > Yes. Tiger's RAM requirements are more stringent than Panther's. > > >> Could PC 133 and PC 100 sticks co-exist under Panther for 2 years >> with no >> problem, and become problematic under Tiger? Even to the point of >> showing >> up under Panther? >> > > Yes. However, IIRC, the all mixed RAM modules will operate at the > lowest > capability among the set. > > >> Even to the point of showing up under Panther? >> > > Yes, if the bad RAM screwed up the underlying machine defaults when > panicing. I suggest resetting the machine's default settings, using > the > following steps: > > Restart the machine booting into Open Firmware (holding down these > keys > until you get a text screen: OPT+ CMD + O + F). Then, enter these > commands, > following each with hitting the return key: > > reset-nvram > set-defaults > reset-all > > For details, see <http://docs.info.apple.com/article.html? > artnum=60285>. > Note that, although the article is an overview for network servers, > "most > of the information included applies broadly to all PCI Macintosh > systems" > and is, IMHO, their definitive guide to Open Firmware and I > recommend its > perusal. > > Once the machine boots up, you should test the RAM modules, one at > a time, > with the Apple Hardware Test that came with the machine. If that's not > available, then try MemTest, available at <http:// > www.memtestosx.org/>. > > >> Could it still be software induced? >> > > Not as far as I know, but the panics could have screwed up the > machine's > defaults-see above. > > _______________________________________________ > G4 mailing list > G4 at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/g4 > > Listmom is trying to clean out his closets! Vintage Mac and random > stuff: > http://search.ebay.com/_W0QQsassZmacguy1984 > > Regards, Wayne Clodfelter wayne at troutnc.com