Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!pyramid!voder!apple!tecot From: tecot@apple.UUCP (Ed Tecot) Newsgroups: comp.sys.mac Subject: Re: What to do when your HD disappears Message-ID: <6854@apple.UUCP> Date: Sun, 29-Nov-87 23:22:21 EST Article-I.D.: apple.6854 Posted: Sun Nov 29 23:22:21 1987 Date-Received: Wed, 2-Dec-87 22:51:07 EST References: <3611@uwmcsd1.UUCP> <2167@unc.cs.unc.edu> Reply-To: tecot@apple.UUCP (Ed Tecot) Organization: Apple Computer Inc., Cupertino, USA Lines: 22 Keywords: Mac II hard disk crash In article <2167@unc.cs.unc.edu> creech@unc.UUCP (Jeff Creech) writes: >I want to *why* it is that some of the Mac II's are losing their SCSI drivers >several times a week. This not what we are paid five grand for! > >Does Apple have an *answer* to this problem? Here is my assessment: When an application crashes, it may end up executing random memory. We have determined that a particular trap, SetOSDefault, has a high probability of being executed when an application goes astray. This trap will cause your startup disk to attempt to boot from a different (nonexeistent) partition. The fix is to reset your parameter RAM, as far as I know, the SCSI driver is not touched. We have a fix for this problem (although it would be nice if applications didn't have these bugs). To determine if you are hitting this, the next time your hard disk refuses to boot, boot off of a floppy, and open the control panel with command-option-shift depressed to reset the parameter RAM. Then attempt to reboot. If this fails, tell me. If this succeeds, post the programs, DAs, INITs, etc. that you use, so that we have some hope of finding the culprit. _emt