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Subject: Re: nasty problem with vnode and other disk drivers?
In-Reply-To: <199710191939.OAA04475@dyson.iquest.net> from "John S. Dyson" at "Oct 19, 97 02:39:00 pm"
To: toor@dyson.iquest.net (John S. Dyson)
Date: Mon, 20 Oct 1997 11:09:09 +1000 (EST)
Cc: proff@iq.org, freebsd-hackers@FreeBSD.ORG
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> From toor@dyson.iquest.net Sun Oct 19 19:40:17 1997
> Delivered-To: proff@iq.org
> From: "John S. Dyson" <toor@dyson.iquest.net>
> Message-Id: <199710191939.OAA04475@dyson.iquest.net>
> Subject: Re: nasty problem with vnode and other disk drivers?
> In-Reply-To: <19971019170838.1109.qmail@iq.org> from Julian Assange at "Oct 19, 97 05:08:38 pm"
> To: proff@iq.org (Julian Assange)
> Date: Sun, 19 Oct 1997 14:39:00 -0500 (EST)
> Cc: freebsd-hackers@FreeBSD.ORG
> X-Mailer: ELM [version 2.4ME+ PL31 (25)]

> Julian Assange said:
> > 
> > 
> > Surely this can't be correct behavior:
> > 
> > # cp /usr/share/dict/words words
> > # head words
> > A
> > a
> > aa
> > aal
> > aalii
> > aam
> > Aani
> > aardvark
> > aardwolf
> > Aaron
> > # vnconfig /dev/vn0 words
> > # dd if=/dev/rvn0 bs=8 count=10
> > A
> > a
> > aa
> > aA
> > a
> > aa
> > aA
> > a
> > aa
> >
> It isn't expected behavior, but raw, block devices currently need I/O on
> 512 byte boundarys for integrals of 512 byte lengths.
> 
> John
> 
> 
> 

/dev/rvn0 is a character device. /dev/vn0 is the block device.