Path: utzoo!attcan!uunet!bellcore!att!att!drutx!druco!dlm
From: dlm@druco.ATT.COM (Daniel L. Moore)
Newsgroups: comp.sys.atari.st
Subject: Re: Spectre and hard disks
Message-ID: <6936@drutx.ATT.COM>
Date: 11 Dec 90 17:26:16 GMT
References: <39964@ucbvax.BERKELEY.EDU>
Sender: news@drutx.ATT.COM
Lines: 36

in article <39964@ucbvax.BERKELEY.EDU>,
emerson@gandalf.Berkeley.EDU (Emerson Mei) says:
>still can't get a hard drive partitioned so that it will 
>work on spectre and the Mac. I now realize that it must be done using a MFS   
>formatted drive and there can be no atari data on the drive.  Still Spectre   
>will not format MFS except on partitions <4.5 megs. and these partitions are  
>not recoginzed by a macintosh. I think it may be the paritioning software. I  
>use ICD's recent version. Has anyone out there done this and could they       
>Pleeeze give me some tips. 


	You can *NOT* format a hard disk on the ST that both a Macintosh
and the Spectre can use.  The partition map that Atari defined for the
ST is not compatible with the partition map that Apple defined for
the Mac.  This will stay true no matter whose partitioning software you
use on the ST.

	Spectre does *NOT* repartition the hard disk or change
the format of the partition map to the format Apple uses.  Spectre just
changes the type of the partition to 'ACK' (or 'OOP' in version 3.0)
instead of 'GEM' or 'BGM' or whatever.  After Spectre changes the
partition type in the map it then writes a Macintosh file system (MFS
or HFS) in the partition.

	You can format/partition hard disks on the Mac and then use
that hard disk with Spectre.  This works great, especially with removable
media drives.  (With Spectre 2.65 you need to use older Mac formatting
software since it doesn't understand the new Mac partition maps.
Spectre 3.0 supports both the old and new Mac partition maps.)



				Dan Moore
				AT&T Bell Labs
				Denver
				dlm@druco.ATT.COM