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From: grr@cbmvax.UUCP (George Robbins)
Newsgroups: comp.sys.amiga
Subject: Re: DF1: format problems.
Message-ID: <2208@cbmvax.UUCP>
Date: Wed, 12-Aug-87 09:02:28 EDT
Article-I.D.: cbmvax.2208
Posted: Wed Aug 12 09:02:28 1987
Date-Received: Fri, 14-Aug-87 05:29:36 EDT
References: <441@esunix.UUCP>
Reply-To: grr@cbmvax.UUCP (George Robbins)
Distribution: na
Organization: Commodore Technology, West Chester, PA
Lines: 26
Keywords: won't format, but will read/write

In article <441@esunix.UUCP> blgardne@esunix.UUCP (Blaine Gardner) writes:
> I've got a very strange problem with my external 3.5" floppy.
> 
> I took it over to a friend's house, and after I got it hooked back up to
> my system the next day, I discovered that disks formatted in drive DF1:
> could not be read in DF0: (and vice versa). A disk formatted in one
> floppy reports "DFn: BAD" when it's inserted in the other drive.
> 
> The really strange thing is that all of the floppies I've already
> formatted can be read or written by BOTH drives without any trouble.
> 
> I would suspect that the alignment on my external drive got bumped. But
> that should also foul up reads & writes, not just formats. Is it
> possible that something inside that Amiga is dying? Any other
> suggestions? Diskcopies also are broken, but file copies work fine.

There's not much in the Amiga that could cause this problem, since the
Amiga makes no distinction between formatting a floppy and normal writing.
I suspect some mechanical mis-alignment just enough that the fringes from
the previous data are letting the other system get a handle on the data,
but it's too far off for a clean disk.  Pretty wierd in my book.

-- 
George Robbins - now working for,	uucp: {ihnp4|seismo|rutgers}!cbmvax!grr
but no way officially representing	arpa: cbmvax!grr@seismo.css.GOV
Commodore, Engineering Department	fone: 215-431-9255 (only by moonlite)