[comp.sys.mac.apps] DiskExpress II Bug?

jye@vax5.cit.cornell.edu (Jeffrey Chen, Cornell University '93) (09/09/90)

Has anyone ever experienced this problem with Disk Express II 2.04:

You perform an optimization and then you shutdown the system-- when you
next try to boot the system, the hard drive will not boot and will not mount.
Apple HD Setup doesn't even acknowledge that you've got a hard disk in SCSI 0.

The only way to get the Disk to mount again is to use SCSI Probe 2.01 and issue
a mount command, and then reboot. The hard disk then resumes to work fine.

I have been trying to find a way to duplicate the problem but so far it has
happens only randomly.

Ideas, anyone?

Jeff Chen
JYE@VAX5.CIT.CORNELL.EDU

aland@chaos.cs.brandeis.edu (Alan D Danziger) (09/10/90)

In article <5408.26ea0cea@vax5.cit.cornell.edu> jye@vax5.cit.cornell.edu (Jeffrey Chen, Cornell University '93) writes:

 Has anyone ever experienced this problem with Disk Express II 2.04:
 You perform an optimization and then you shutdown the system-- when you
 next try to boot the system, the hard drive will not boot and will
 not mount
 Apple HD Setup doesn't even acknowledge that you've got a hard disk
 in SCSI 0.
 The only way to get the Disk to mount again is to use SCSI Probe 2.01
 and issue a mount command, and then reboot. The hard disk then resumes to work fine.
 I have been trying to find a way to duplicate the problem but so far it has
 happens only randomly.

Sounds to me that it is possible that DEII might be messing around
with the system file or the finder file at the time you shut down,
which might alter the boot blocks on the HD...  Once the disk is
mounted, you probably checked out the system folder (opening it and
shutting it with a system & finder file in it would restore the boot
blocks) which fixed the problem...
	(These are my ideas.  If someone has a better idea, or knows
that I am wrong for some particular reason, please tell me because I
would rather be correct than proud :-) )
--

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ts@cup.portal.com (Tim W Smith) (09/15/90)

The fact that the original poster says that when he sees this problem,
the disk does not show up in HD Setup, indicates that the problem is
probably not with DiskExpress II.  It sounds like a hardware problem.

					Tim Smith