Path: utzoo!mnetor!uunet!husc6!tut.cis.ohio-state.edu!mailrus!nrl-cmf!ames!pacbell!att-ih!ihnp4!ihlpg!starner
From: starner@ihlpg.ATT.COM (Guy Starner)
Newsgroups: comp.sys.amiga
Subject: Differences between harddisk.device and trackdisk.device
Message-ID: <5014@ihlpg.ATT.COM>
Date: 11 Mar 88 18:46:28 GMT
Organization: AT&T Bell Laboratories - Naperville, Illinois
Lines: 48
Keywords: hard disk, A2090


Help!  Two week ago I bought an A2090 card and a Seagate
ST-251-1 (40 Meg, 28 ms).  After less than a week, the
disk became corrupted so that it wouldn't validate.
The problem occurred while I was moving icons around
in workbench.  The system froze up and when I rebooted
the validation failed!  So I had to reformat the drive
losing about 20 Meg and 2 evenings work in the process.
After reformatting I started to repopulate the disk.
Last night I found that one of my directories was corrupted.
When I listed the directory a group of file start appearing
repeatedly in the list.  I deleted all files and directories
from the corrupted directory except one which no DOS command
can seem to find (except "list").

I would like to fix this problem by using a disk editing
tool rather than reformatting.  (I have put about 15 Meg
back onto the disk.)  The only disk editing tool that I
have that seems to work at all with the hard disk is
sectorama.  (disked does not know about dh0:.  diskdoctor,
which I would rather not use in the first place, says
that I don't have enough ram (1 Meg is not enough??).)
However, what sectorama shows me does not match up with
the file system description in the Amiga Dos manual.

So my question is: how do the trackdisk.device and
harddisk.device differ?  It seems that they should
look basically the same to Amiga DOS.  Maybe the
only difference is where the root block and bitmap
are located (where are they?) and the size of the bitmap.
Are the formats of the root, directory, file header
and file data blocks the same?  Also does anyone
know if the new harddisk.device floating around
on BBSs (which was created to solve overscan 
problems?) will help prevent the corruption problems
I am having?

Any help would be appreciated.  Thanks in advance.

			Guy Starner
			AT&T Bell Laboratories
			Naperville, Il
			...!ihnp4!ixlpn!starner
-- 

				Guy Starner
				IHP 2F-522, 416-7396
				ixlpn!starner