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From: jcs@zodiac.phy.duke.edu
Newsgroups: comp.sys.mac.hardware
Subject: Need help with failing 800k drive (clean & realign)
Message-ID: <22046@duke.cs.duke.edu>
Date: 6 Mar 91 20:02:29 GMT
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Dear folks,
Last night the 800k internal drive in my mac (1985 128 upgraded
to a 512k and finally third party SCSI and 1meg) stopped working.
In particular, it seemed to work fine reading a disk, but would take
a very long (minutes) time writing a file (a few k) at which
point any subsequent disk accesses would result in the "This
is an unreadable disk, shall I initialize it..." dialog. Writing
folders to disk yielded some files unwritable.

This morning I swapped the drive with a 800k spare (from my brother's
SE HD upgrade). The new drive works ok now (I had to use the new
drive but the original cable, using the SE cable caused the drive
to try to eject and hang the mac at startup; I don't know why).

The old drive had dust and cat hair in it, not to much but some.
(I have two cats and a fan in the handle which may suck air through
the drive...).

My questions are:
a) How do I clean and realign the bad drive?
b) Will I have any trouble using the SE drive in my Mac pseudo-Plus?
c) What is the difference between the SE and Plus cables?
d) I have an old 400k drive case (the drive is dead). Is there a 
   prescribed way for hooking the repaied internal as an external?

(I have checked Pina's book with no success...)
Thanks in advance,
John Swartz
--
	John C. Swartz					1-919-684-8279
	Duke University Dept. of Physics		jcs@phy.duke.edu
	Durham, N.C.      27706