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From: fiatlux@ucscc.UCSC.EDU.ucsc.edu (David Vangerov)
Newsgroups: comp.sys.mac
Subject: Disapearing Hard Drives on a Mac II
Message-ID: <1155@saturn.ucsc.edu>
Date: Tue, 17-Nov-87 04:46:44 EST
Article-I.D.: saturn.1155
Posted: Tue Nov 17 04:46:44 1987
Date-Received: Sat, 21-Nov-87 03:48:46 EST
Sender: usenet@saturn.ucsc.edu
Reply-To: fiatlux@ucscc.UCSC.EDU (David Vangerov)
Organization: University of California, Santa Cruz; CATS
Lines: 49
Keywords: no hard drive all of a sudden

I don't remember the article specifically, and I don't feel like
looking back for it, but someone had a problem when they set
their ram cache to 750K and then couldn't undo. Well, along the
way to undoing this, his hard drive suddenly disapeared from his
Mac II, and he had to reformat it.

Well, this happened to the one we had a at work (and another one
with the same problem came into the shop a while ago) and I
managed to restore the drive without having to reformat it and
such.

What happens is that some application that you were running has
managed to die and you were forced to reboot. Instead of getting
a happy mac and the mac rebooting in less than 7 seconds (WOW!,
what speed!), you get an icon asking you to insert disk. I don't
know how the Mac manages to forget about it's internal hard
drive, but it happens (and damn annoying when it does). Anyways,
this happened to me, I was very panicked and wonder if I had
trashed the disk somehow (I was attempting to restore someones
crashed disk and must've done something to the hard disk by
accident). Anyways, it's not there, I know that it is. Solution,
not reformatting it. All I had to do was get out my systems tool
disk, boot up with it, and then run the hard disk installer (HDSC
setup 1.4, I believe), it managed to find the drive, I simply
ran a test of the disk and updated the driver (the second time it
happened we just updated the driver) and after that, the disk
came back and things work just fine now.

A lot easier than having to reformat the disk and then restore
from backup (assuming that you are a responsible user and backup
your hardisk every week). 

Reformatting the drive won't help restore the control panel
settings to "factory mode" because the settings of the control
panel (and the other CDEV's, if I'm not mistaken) is kept in a
special part of memory that stays there even with the power off.
Someone called it the PRAM. I haven't dared try this with our mac
II yet, thought it would seem that all you have to do is remove
the battery for a second and then pop it back in if
Command-Shift-Option-Whatever doesn't do it for you. Of course
the battery on a Mac II is a little harder to get to than on a
standard Mac 512/Plus.


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|		     	        David Vangerov				     | 
|    Just your average Theater Arts major with a weird thing for computers   |
| fiatlux@ucscc.BITNET || fiatlux@ucscc.ucsc.EDU || ...!ucbvax!ucscc!fiatlux | 
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