From owner-freebsd-current  Wed Jun 17 09:13:31 1998
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	Thu, 18 Jun 1998 02:13:24 +1000
Date: Thu, 18 Jun 1998 02:13:24 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199806171613.CAA10046@godzilla.zeta.org.au>
To: julian@whistle.com, zach@gaffaneys.com
Subject: Re: Softupdates on floppy suck badly.
Cc: current@FreeBSD.ORG
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>Whenever softupdates are enabled on a floppy, I get this after trying to
>write something to the disk.
>
>panic: isa_dmastart: bad bounce buffer

This can be caused by attempting to access beyond the end of a buffer.
Attempting to access beyond the end of a buffer can be caused by a vm
bug which is triggered by attempting to do i/o with certain combinations
of block sizes and block numbers.  Only uniform block sizes work right.

Bruce

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