Hard drives (Was re: QC)

[peterm@tlp.apana.org.au (Peterm)]

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���W�%* On 14-02-95, David E A Wilson was waffling to All about:
 DW> Not quite - the early Mac SCSI implementation (I think only
 DW> the Mac Plus) took
 DW> some liberties with the spec. I have a Western Digital
 DW> drive which has a
 DW> jumper to select Apple SCSI instead of standard SCSI-2.
That's most likely to get around the Unit Attention problem that the early 
revisions of the Mac SCSI support had. This was fixed (supposedly) by the time 
the "new" Mac Plus arrived.
 DW> A Mac SCSI drive can mean a drive which has had its
 DW> firmware modified to get
 DW> around the problem and work on all SCSI equipped Macs.
One big modification is to put an Apple copyright (or somesuch) into the ROM 
so that the Apple HDSC Utilities will recognise the drive.
 DW> These days this is becoming less & less of an issue.
 DW> --
Yup... shouldn't have many problems. Even got a couple of Adaptec boards to 
run with MFM drives.
The RF card's built-in utilities will tackle almost any drive I have been able 
to throw at them. Even re-formatted a 315 megger from an IBM AS/400 that was 
setup with 520 bytes per sector. The PS/2s at Work couldn't do it. :)
*<8o)X
Regds,
 Peter M.


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