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From: apratt@atari.UUCP (Allan Pratt)
Newsgroups: comp.sys.atari.st,comp.sys.atari.st.tech
Subject: Using ST hard disks on TT's
Keywords: Supra, ICD, partitions
Message-ID: <2928@atari.UUCP>
Date: 6 May 91 19:04:33 GMT
Organization: Atari Corp., Sunnyvale CA
Lines: 30

A couple of people have written to me complaining that their TT's only see
the first four partitions of the hard disks they were using on their ST
systems.

The answer to this problem is always the same: the driver is different.

Supra (and ICD?) use tricks that we don't use to get more than four
partitions on a drive.  We use a different trick.  When you attach a
drive with more than four partitions to a TT, you are using the hard-disk
driver from Atari which is on the TT's internal hard disk, not the driver
that understands Supra's trick.

Since these drivers probably don't work on TT's and certainly don't know
about the TT's SCSI port, you are stuck.  You should copy all the data off
of the Supra drive, and use the HD tools that come with the TT to reformat
and repartition it.  These tools will let you create more than four
partitions, but they'll do it the Atari way, not the Supra way.

It is possible that HDX will not be able to format your drive, because it
can't tell how big it is.  HDX can always tell how big SCSI drives are
(that is, drives on the SCSI bus), but it can't always tell about ACSI
drives.  It might ask you what type of drive it is, with a menu of drive
types to choose from.  In either of those cases, I can't help you -- I
don't know which type to choose for the various Supra drives.

Good luck.

============================================
Opinions expressed above do not necessarily	-- Allan Pratt, Atari Corp.
reflect those of Atari Corp. or anyone else.	  ...ames!atari!apratt