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From: michaelg@Neon.Stanford.EDU (Michael Greenwald)
Newsgroups: comp.sys.mac.system
Subject: Dove MacSnap Memory upgrade vs. Hard Disks
Message-ID: <1990Nov26.222812.25166@Neon.Stanford.EDU>
Date: 26 Nov 90 22:28:12 GMT
Distribution: comp
Organization: Computer Science Department, Stanford University
Lines: 30

I bought a 2Meg upgrade with SCSI port for my old "original" Mac to
extend its life.  For a while this worked perfectly.  Then I bought a
hard drive (80Mb EMAC Metro).  

The first problem was because the Dove SCSI board didn't connect all
of the SCSI control lines.  I had to add a jumper to even get the drive
to mount.  Now it mounts, and on the surface appears to work fine.

But occassionally the disk just hangs.  I tried it out in a computer
store with other disks, and it experiences the same problems, so I
don't belieive it is the fault of the drive.  (which seems to work
fine when connected to other computers).  The two most common
offending programs are Word and Excel (Excel 2.2 *never* works - it
always hangs, I had to back off to 1.5), although other programs have
experienced similar problems but much more rarely.  These programs
work fine when the hard drive is shut off and I have both the System
and Excel (or Word) on floppies.  But this is intolerable (even with
the system living in a RAM disk, the swapping of floppies is a pain
(Excel 2.2 doesn't fit on the same 800K disk as my spreadsheets!, and
I won't be able to use Help or Spelling dictionaries or anything...)

Removing all Inits doesn't solve the problem.

Has anyone else experienced something like this?  Is there a
possiblity that the fact that there is a 512KE logic board instead of
a Mac Plus logic board making a difference?  I'm running System 6.0.5
and had >no< problems in the floppy only configuration.

Thank you for any help.  If you want to email the response, that is
fine.