After using my external Seagate ST1917 8gb SCSI drive trouble-free for
several years now, an old problem has reappeared. My IDE system hangs on
boot with the external SCSI drive turned on and will only boot with the
external SCSI drive turned off. Sometimes, the boot sequence will advance as
far as loading one or two extensions, and then the spinning ball will appear
for a few minutes and then morph into a tiny black bomb. Other times, the
system will hang before the happy Mac face appears, with the cursor frozen
in the upper right corner of the screen).

Back in the good old days when I had a 7200/120 and an 8100/80 on hand, I'd
fix the problem by moving the external SCSI drive to the other Mac (which
would mount the drive just fine), delete the desktop files with File Buddy,
and then reattach the external SCSI drive to the original Mac and let the
system rebuild the desktop files on boot. That always managed to cure the
problem (though I never did figure out what was going on). I do recall that
this problem sometimes got so bad that I would have to physically disconnect
the external SCSI cable from my 7200 before it would boot (turning off the
power to the external SCSI drive would not be enough).

Unfortunately, these days I only have my beige G3 (OS9.2.2, OWC G4/466,
768mb, Radeon 7000, Wings AV) and all my utilities are backed up on my
external SCSI drive, so it's a real catch-22. I went ahead and booted the
system with the external SCSI drive turned off, and then turned on the
external SCSI drive and scanned the bus with Drive Setup (OS9.2.2) and
Anubis disk utility. The external SCSI drive shows up on a bus rescan (which
suggests that the SCSI hardware is probably OK), but will not mount with any
of these disk utilities.

So far, I've tried desktop rebuilds, PRAM zaps, CUDA resets, an active
(electrical) termination device, prayer, cursing, and praise. Before I go
out a buy an old used Mac (I gave away my 7200/120 a couple of years ago!)
to try the old cure, I thought maybe one of you might have encountered this
problem. In the spirit of full disclosure, I should mention that this
problem arose after using Norton Disk Doctor and Speed Disk (Systemworks
2.0) a lot, but I don't want this to get sidetracked into a Norton-bashing
session.

Any help appreciated. -Wayne in Seattle


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