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To: Colin Percival <colin.percival@wadham.ox.ac.uk>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Mon, 01 Mar 2004 15:06:05 GMT."
             <6.0.1.1.1.20040301150348.0386a6a8@imap.sfu.ca> 
Date: Mon, 01 Mar 2004 16:10:14 +0100
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cc: Colin Percival <cperciva@FreeBSD.org>
cc: Bruce Evans <bde@zeta.org.au>
Subject: Re: cvs commit: src/sys/dev/md md.c 
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In message <6.0.1.1.1.20040301150348.0386a6a8@imap.sfu.ca>, Colin Percival writes:
>At 15:02 01/03/2004, Poul-Henning Kamp wrote:
>>In message <6.0.1.1.1.20040301145406.038ede88@imap.sfu.ca>, Colin Percival 
>>writes:
>> >   Ideally, dd should look at what it's being asked to access, and get
>> >a default block size from that.  (Yes, there are much worse offenders,
>> >dd just happened to be the first problem which came to mind.)
>>
>>No, dd(1) should do _exactly_ what we ask it to, with absolutely no DWIM
>>logic.
>
>   Note that I said "default block size".  I'm not talking about overriding
>command-line options, I'm talking about making "dd if=/dev/foo of=/dev/bar"
>work if the foo or bar devices have >512 byte sectors.  (But this is mostly
>irrelevant now anyway.)

And I'm talking about dd(1) being used for such arcane things that changing
the defaults is an absolute NO! thing :-)

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.