Re: SCSI woes, again.

[dempson@actrix.gen.nz (David Empson)]

In article <9AUG199416170288@vax2.concordia.ca>,
Mitchell Spector <spector@vax2.concordia.ca> wrote:
> 
> 	Usually, somewhere on the old non-DMA Apple SCSI cards, is a marking
> indicating what hardware revision it is (rev A, B or C).

I wasn't aware of there being any hardware revisions - I have an
original card (shipped with Rev A ROM) which was later upgraded to a
Rev C ROM.

> If your using an Apple 40SC, you may need to use the GS/OS SCSI
> drivers from System 5.0.4. For some odd reason, System 6.0/6.0.1's SCSI
> drivers will _not_ work with the Apple 20SC HD!

That's interesting - I have the same problem with my old Rodime 69 MB
drive.  It works fine with the System 5.0.4 drivers (on either the
original or High Speed Apple SCSI cards), but doesn't work with the
6.0 or 6.0.1 drivers on the original Apple SCSI card (it is fine on
the High Speed card).

You may run into all sorts of nasty problems if you use the 5.0.4
drivers in System 6.0 or later - programs may assume that newer
features are available.  In particular, do _not_ use the System 6
version of Advanced Disk Utility with the 5.0.4 drivers - use 5.0.4's
ADU instead.  Don't try to mark partitions "read only" from Finder,
either.
-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand