[comp.os.minix] MINIX ST and Supra hard disks

kimmel@umvlsi.ECS.UMASS.EDU (Mathew Kimmel) (11/12/88)

I've heard that the current version of Minix ST will not talk to Supra
hard disks.  However, I've also seen a message from someone who says he
uses a Supra hard disk with Minix ST and has no problems.  I'm not sure
what to believe, but I'd like to know the answer before I buy Minix.
Can the current version of Minix ST talk to a Supra hard disk?  If not,
is there a patch available that I could apply to the operating system to
fix this?

Thanks,
-Matt
-- 
Matt Kimmel          University of Massachusetts          Amherst, Mass.

Internet: kimmel@umvlsi.ecs.umass.edu              Bitnet: KIMMEL@UMAECS
FidoNet: 1:321/112

trb@stag.UUCP ( Todd Burkey ) (11/14/88)

In article <28@umvlsi.ECS.UMASS.EDU> kimmel@umvlsi.ECS.UMASS.EDU (Mathew Kimmel) writes:
>I've heard that the current version of Minix ST will not talk to Supra
>hard disks.  However, I've also seen a message from someone who says he
>uses a Supra hard disk with Minix ST and has no problems.  I'm not sure
>what to believe, but I'd like to know the answer before I buy Minix.
>Can the current version of Minix ST talk to a Supra hard disk?  If not,
>is there a patch available that I could apply to the operating system to
>fix this?

A friend just bought his second 30MB Supra recently and discovered that the
newer one works fine under Minix, but the older (8 months old) Supra
doesn't. He is using the same format/utility software for each, and
the only obvious difference is that the drive types were different (I
think he said the new one was Seagate and the old was Miniscribe). The
drive type shouldn't affect operation, so there must have been other
changes in the ST-SCSI adapter as well. I hear that Supra is working
on the problem, so hopefully there will be a software fix for the older
drives.

  -Todd Burkey
   trb@stag.UUCP

johan@nlgvax.UUCP (Johan Stevenson) (11/14/88)

In article <28@umvlsi.ECS.UMASS.EDU> kimmel@umvlsi.ECS.UMASS.EDU (Mathew Kimmel) writes:
	>I've heard that the current version of Minix ST will not talk to Supra
	>hard disks.  However, I've also seen a message from someone who says he
	>uses a Supra hard disk with Minix ST and has no problems.  I'm not sure
	>what to believe, but I'd like to know the answer before I buy Minix.
	>Can the current version of Minix ST talk to a Supra hard disk?  If not,
	>is there a patch available that I could apply to the operating system to
	>fix this?

I have been called by one of the developers of Supra (W. Brown), who
mentioned problems reported by some of his customers. He himself had 
no MINIX-ST and I have no Supra disk. Has someone on the net a
combination of these two ingredients at hand, with some time and
willingness to look into this problem?
I would very much like to have MINIX-ST run on the Supra drive, since
they are quite popular.
--
Johan W. Stevenson	johan@pcg.philips.nl		Philips Research

dclemans.falcon@mntgfx.mentor.com (Dave Clemans) (11/15/88)

From article <28@umvlsi.ECS.UMASS.EDU>, by kimmel@umvlsi.ECS.UMASS.EDU (Mathew Kimmel):
> I've heard that the current version of Minix ST will not talk to Supra
> hard disks.  However, I've also seen a message from someone who says he
> uses a Supra hard disk with Minix ST and has no problems.  I'm not sure
> what to believe, but I'd like to know the answer before I buy Minix.
> Can the current version of Minix ST talk to a Supra hard disk?  If not,
> is there a patch available that I could apply to the operating system to
> fix this?
> 

Could this be a situation similar to what the PC-Ditto people just issued
a patch for?  PC-Ditto (the IBM PC emulator for the ST) has its own drivers
for hard disks.  Apparently some versions of ST DMA port adaptor boards
are slower at responding to commands than others; in particular the PC-Ditto
note talked about older Supra boards.  PC-Ditto recently issued a patch
that changed timing parameters in their driver to make it work on Supra's.

dgc

hyc@math.lsa.umich.edu (Howard Chu) (11/17/88)

In article <154@nlgvax.UUCP> johan@nlgvax.UUCP (Johan Stevenson) writes:
>I have been called by one of the developers of Supra (W. Brown), who
>mentioned problems reported by some of his customers. He himself had 
>no MINIX-ST and I have no Supra disk. Has someone on the net a
>combination of these two ingredients at hand, with some time and
>willingness to look into this problem?
>I would very much like to have MINIX-ST run on the Supra drive, since
>they are quite popular.
>--
>Johan W. Stevenson	johan@pcg.philips.nl		Philips Research

I have (had?) a Supra 20MB drive that originally did not work with Minix.
This drive was attached with a version 2 Supra host adapter card. Given
this and version 2.01 formatting software, Minix would not use this drive.
I now have the version 5 host adaptor (I think it's #5, it has the pass-thru
DMA connector as well as the onboard clock) and version 3.2 formatting
software with the same drive mechanism, and this combination does work.

Unfortunately I can't verify if the new formatter and old host adaptor
will work, since the old one is quite thoroughly fried. I am now using
Minix on a 40MB Miniscribe 8051S, with the 20MB Miniscribe 8425S attached
as a GEMDOS only drive, with the new Supra host adaptor.
--
  /
 /_ , ,_.                      Howard Chu
/ /(_/(__                University of Michigan
    /           Computing Center          College of LS&A
   '              Unix Project          Information Systems