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From: lipsett@inmet.UUCP
Newsgroups: comp.sys.mac
Subject: 512K Mac/800K Drive
Message-ID: <127200001@inmet>
Date: Tue, 9-Dec-86 12:51:00 EST
Article-I.D.: inmet.127200001
Posted: Tue Dec  9 12:51:00 1986
Date-Received: Sun, 14-Dec-86 06:38:16 EST
Lines: 32
Nf-ID: #N:inmet:127200001:000:1328
Nf-From: inmet.UUCP!lipsett    Dec  9 12:51:00 1986



I have a vanilla 512K Mac and am considering a second disk drive.  I
would like to get an 800K drive, but have a number of questions that I
can't seem to get consistent answers to.  Perhaps someone out there
can help me.

1.  I understand that I can use the 800K drive as an 800K drive if I
am running 3.2 and 5.3 with the HD20 file.  But can I use the 800K
drive as a 400K drive with the old System and Finder files (e.g., as a
data disk for existing applications in which I might not want to
replace the system software)?

2.  Is there a way to format an 800K disk as an MFS disk?  If so, how
does this relate to the above question with respect to existing
applications?  Do I still need the HD20 file and the new system
software? (BTW, I can't seem to get my 512K to format a single-sided
disk as HFS no matter what I try - I have tried holding down the
option key and all that - what am I missing?).

3.  Have there been any reported problems with 400K disks in 800K
drives with respect to heads?  What fraction of (good) 400K disks can
be formatted double-sided and have them work?

4.  What external 800K drives do people recommend?

Thanks in advance.  e-mail would probably be more appropriate unless
you think the answers are of general interest.

					Roger Lipsett
					ihnp4!inmet!lipsett
					mirror!inmet!lipsett