Path: utzoo!attcan!uunet!tektronix!percival!parsely!agora!billsey
From: billsey@agora.UUCP (Bill Seymour)
Newsgroups: comp.sys.amiga
Subject: Re: Supra HD
Message-ID: <1323@agora.UUCP>
Date: 7 Jan 89 07:18:45 GMT
References: <42@sdcc10.ucsd.EDU:
Organization: Advanced Solutions, Hillsboro, OR
Lines: 50

From article <42@sdcc10.ucsd.EDU:, by cs161agc@sdcc10.ucsd.EDU (John Schultz):
: 
:   I'm using a 1000, both of the 2000's I use have 2090As & ST251-1s.
: I have successfully used Mount on the 1000, even though Supra said
: it couldn't be done.  I saved about 100k, but when testing an alpha
: program for a friend, my drive got a "Key already set error", which
: I never got before.  I don't know if the program trashed the drive,
: or if it got trashed because I used the Mount method instead of
: Supramount[the program was _reading_ from the drive, not writing].

	I usually get the 'Key already set error' when I've written to
the drive with my 2000, then written to it with the 1000 and haven't done
a diskchange between times. I end up going in with Sectorama and manually
fix it, but that can be a pain sometimes. There is no reason you can't
use the Mount command on a Supra interface, SupraMount just makes it a
bit easier.

:   Why?  I can mount with Mount or Supramount interchangeably.  The
: partition information for Supramount gets written to the hard disk
: [first couple of tracks], Mount never sees it, as it gets partition
: info from mountlist.

	I haven't tried it on the 1000, but on the 2000 if I try that I
get the partition mounted twice. What I was trying to say was that you
wouldn't be able to use both SupraMount and Mount in the same session.
for the DMA interface, SupraMount pretty much has to be run first before
Mounting a partition manually.

:   So, you've never had any problems using Mount eh?  Maybe I'll try 
: it again.  Reboot times are quite a bit faster using
: mount...Are you using the scsidisk.device in your mountlist?

	On my system here at home I use the scsidisk.device. It's quite
a bit faster. My drive is formatted with a 1:1 interleave so I can get
maximum speed out of my 2000 and with the old harddisk.device the 1000
was *real slow* (diskperfs of around 60K/sec...) Now with the scsidisk
I get much faster access on the 1000, with no loss on the 2000. On my
system at work, I can't use the scsidisk.device. I have a Rodime and 
an Adaptec 4070 and at least one of them doesn't *always* have the byte
ready when I need it... I'm hoping one of the things Supra adds when
they do their new software is the ability to choose a different device
driver for different physical drives.

: 
:  John Schultz
-- 
     -Bill Seymour             ...tektronix!reed!percival!agora!billsey
                               ...tektronix!sequent!blowpig!billsey
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