Path: utzoo!attcan!uunet!cbmvax!jesup
From: jesup@cbmvax.UUCP (Randell Jesup)
Newsgroups: comp.sys.amiga
Subject: Re: A plea for bad block handling in the file system.
Message-ID: <3859@cbmvax.UUCP>
Date: 24 May 88 15:19:57 GMT
References: <2009@sugar.UUCP> <7144@swan.ulowell.edu> <2026@sugar.UUCP> <2762@umd5.umd.edu> <5748@cup.portal.com>
Reply-To: jesup@cbmvax.UUCP (Randell Jesup)
Organization: Commodore Technology, West Chester, PA
Lines: 22

In article <5748@cup.portal.com> Gary_D_Walborn@cup.portal.com writes:
>HELP!!!!  I am using an Amiga 2090 controller with a SCSI drive manufactured
>for the Mac.  When I format the drive everything appears normal.  The format
...
>when I use the drive, I will eventually get a 'Read/Write Error' requestor
>for this disk.  A disk sector editor will refuse to read the sector in
>error.  In addition, if the 'bad block' checker is run once I have used the
>drive for a while, it shows a large number of bad blocks.  Once those blocks
>are removed by the 'bad block' remover, the disk often becomes 'Corrupted' and
>the system will refuse to use that disk.

	It sounds like these utilities you're using are Mac utilities, and they
think something has wiped sectors (because AmigaDos has written to them.)  When
they remove the sectors, of course this will confuse AmigaDos.

	Tell it to use 512 bytes sectors (if you can), re-prep it (i.e. do a
low level SCSI format), then reformat (amigados) the partitions, and try again.
It's possible that you've told it the drive has more sectors (tracks * heads *
blocks/track) than it has after bad-block mapping.  If the previous fails, try
reducing the number of cylinders you say it has.

Randell Jesup		{uunet|ihnp4|allegra}!cbmvax!jesup