Date: Wed, 28 Mar 2001 05:08:40 -0800 From: Julian Elischer <julian@elischer.org> To: Ceri Storey <c.storey@student.umist.ac.uk> Cc: Peter Pentchev <roam@orbitel.bg>, Sandeep Kohli <fuhrer6mill@yahoo.com>, fbsd-hackers <freebsd-hackers@freebsd.org> Subject: Re: accessing ide Message-ID: <3AC1E257.F8E2414C@elischer.org> References: <3AC1D2B2.F3244CA2@yahoo.com> <20010328113625.C5524@ringworld.oblivion.bg> <20010328104240.B443@cds220.halls.umist.ac.uk>
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Ceri Storey wrote: > > 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? yes they are not equivalent.. ad0 is the entire physical drive ad0c is the same as ad0s1 (or whatever slice is your first BSD slice). Do NOT use ad0c. it is magicly the same as ad0s1 but the magic is scheduled to dissappear some time in the next 10 years. > -- > Ceri Storey <cez@pkl.net> http://pkl.net/~cez/ > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message -- __--_|\ Julian Elischer / \ julian@elischer.org ( OZ ) World tour 2000-2001 ---> X_.---._/ v To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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