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Date:      Sun, 12 Feb 2006 08:52:01 -0500
From:      Chuck Swiger <cswiger@mac.com>
To:        "gs_stoller@juno.com" <gs_stoller@juno.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Direct disk access, was: Re: (no subject)
Message-ID:  <43EF3D81.5000202@mac.com>
In-Reply-To: <20060211.190237.29586.250540@webmail65.nyc.untd.com>
References:  <20060211.190237.29586.250540@webmail65.nyc.untd.com>

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gs_stoller@juno.com wrote:
> 	I would like to have the source code of (the set of) programs
> that can "read from"/"write to" any sector of a disk without a
> file-system, think of them as the disk i/o programs that underly the
> file-system.  I expect them to have (collectively) about four arguments,
> one specifying the disk to access, the second pointing to a buffer
> (supplying the data to write or to accept the data read), the third
> stating the number of bytes to transfer, and the fourth giving the  LBA 
> address of the sector to be accessed.

Sounds a bit like homework to me, but what you want is here:

/usr/src/bin/dd

See "man dd".

-- 
-Chuck



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