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Date:      Wed, 28 Mar 2001 10:42:40 +0100
From:      Ceri Storey <c.storey@student.umist.ac.uk>
To:        Peter Pentchev <roam@orbitel.bg>
Cc:        Sandeep Kohli <fuhrer6mill@yahoo.com>, fbsd-hackers <freebsd-hackers@freebsd.org>
Subject:   Re: accessing ide
Message-ID:  <20010328104240.B443@cds220.halls.umist.ac.uk>
In-Reply-To: <20010328113625.C5524@ringworld.oblivion.bg>; from roam@orbitel.bg on Wed, Mar 28, 2001 at 11:36:25AM %2B0300
References:  <3AC1D2B2.F3244CA2@yahoo.com> <20010328113625.C5524@ringworld.oblivion.bg>

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On Wed, Mar 28, 2001 at 11:36:25AM +0300, Peter Pentchev wrote:
[...]
> And btw, another part of your problem could be that FreeBSD
> has used ad, not wd, for ATAPI devices access for some time;
> unless you're running < 4.0 (or hmm, somebody correct me: when
> did the wd -> ad transition take place?), try opening /dev/ad0
> or /dev/ad0c.
> 
> Both 'head -c 512 /dev/ad0 | hd' and 'head -c 512 /dev/ad0c | hd'
> work for me, on 4.2-stable (4.3-RC from March 25th).

but these two command lines give me different results, eg:
cds220# head -c 32 /dev/ad0c | hd
00000000  eb 1b 90 90 16 1f 66 6a  00 51 50 06 53 31 c0 88  |......fj.QP.S1..|
00000010  f0 50 6a 10 89 e5 e8 c7  00 8d 66 10 cb fc 31 c9  |.Pj.......f...1.|
00000020
cds220# head -c 32 /dev/ad0 | hd
00000000  fc 31 c0 8e c0 8e d8 8e  d0 bc 00 7c bd 00 0a 89  |.1.........|....|
00000010  ef b9 08 00 f3 ab fe 45  f2 52 bb 00 06 89 ee b8  |.......E.R......|

so they are not equivalent?
-- 
Ceri Storey <cez@pkl.net> http://pkl.net/~cez/

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