If there's no way to detect from the drive that there is no disk in the
drive, or that it's write-protected (I seem to remember write-protection
actually generating a failure on a write...), I'd say probably an eight-
count or ten-count on that would be a good rule of thumb; i.e. if you're
failing on ten consecutive blocks, especially on a floppy, the floppy's
probably pretty well unusable.

On Mon, 2 Dec 2002, Daniel Carosone wrote:

# Date: Mon, 2 Dec 2002 10:04:41 +1100
# From: Daniel Carosone <dan@geek.com.au>
# To: Julio Merino <jmmv@menta.net>
# Cc: tech-kern@netbsd.org
# Subject: Re: fd hard errors
#
# On Sun, Dec 01, 2002 at 11:56:25PM +0100, Julio Merino wrote:
# > As I see it, a solution could be: "If a block fails with a hard error,
# > remove all other pending blocks for the same drive from the queue
# > because they will fail, almost always".
#
# This might be true in the "no disk in drive" and "write protected"
# cases.  It won't be so for the case of a genuine bad block on the
# fd media.
#
# I'd say your approach is good, if you can distinguish these cases.
#
# --
# Dan.
#


				--*greywolf;
--
NetBSD:  For IQs higher than 120.