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From: hcj@lzaz.ATT.COM (HC Johnson)
Newsgroups: comp.os.minix
Subject: Re: MINIX-ST and Supra drives (Mail failed!)
Summary: later SUPRA systems (with fan?) work.
	 Vanilla ST MINIX will access first 4 partitions
Message-ID: <754@lzaz.ATT.COM>
Date: 25 Aug 89 12:16:46 GMT
References: <458@nixpbe.UUCP>
Organization: AT&T ISL Lincroft NJ USA
Lines: 30

> >> Do you know if vanilla MINIX on an ST handles SUPRA hard disk drives
> >> correctly? I'd hate to screw up my disk and have to reformat....
> >>
> >
> > There was a Supra driver for MINIX-ST
> > posted by Howard C Johnson. You might want to look at that.
> >So long.
> >
There seems to be three vintages of SUPRA.
The OLD ones never seemed to run MINIX (That is to say there were interrupt
problems).

The INTERMEDIATE ones seemed to require a change in the MINIX driver to
change timing.  Supra supplied the changes and they were posted long ago.

The NEWER ones (with fan) and definitely with a DMA out connector seem to
work OK.

Supra can describe 12 partitions on a disk, Standard Atari (and MINIX) do
only 4.  As Supra uses the same first 4, it is compatible.  ONLY you cannot
access the remaining 8 partitions.

I posted a while back a simple change to stwini.c that will deal with
all 12 partitions.  If you missed this, or want it, send mail.


Howard C. Johnson
ATT Bell Labs
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