Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!emory!gatech!bloom-beacon!eru!hagbard!sunic!mcsun!ukc!strath-cs!str-va!cabr07
From: cabr07@vaxa.strath.ac.uk
Newsgroups: comp.sys.acorn
Subject: Floppy problem?
Message-ID: <1991Apr22.114255.11455@vaxa.strath.ac.uk>
Date: 22 Apr 91 11:42:54 GMT
Organization: Strathclyde University Physics
Lines: 37

Has anyone come across this problem with their 3.5" floppy on an Arc?

The drive formats floppies and reads old floppies with no problem.   Then
when I save a large file to it the disc usually can't be verified.  I have
looked at the disc with a sector editor and find that there are crc errors
on the first sector of most tracks on one side of the disk.  Occasionally
there is a sector not found error, again on the first sector of most tracks
on one side.

(These are disk errors 08 and 10, I think - has anyone got a list of disk
error codes?)

This seems to me to be a very strange problem since formatting is no problem.
The only thing I can think of is that the disc position sensor is faulty since
this is read once per revolution - but is it read at any time apart from
formatting?  - someone with technical info about ADFS should know this one.

The other possibility is a faulty ROM set - has anyone else noticed on the hour
glass that the pile of sand in the bottom half is non symmetric at the top
of the pile (there is a set pixel at the left and not at the right)?  You
can see this most easily in mode 2.

Any comments would be appreciated.

Gordon.

PS I have 2 weeks of warranty left to run but I don't trust the place I bought
the machine to make a very good job of fixing it.   I have heard that I can
return it to any Acorn dealer for a free fix - is this true?
-- 
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