From owner-freebsd-current  Tue Nov 19 19:49:57 2002
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Date: Tue, 19 Nov 2002 22:49:55 -0500 (EST)
From: Garrett Wollman <wollman@lcs.mit.edu>
Message-Id: <200211200349.gAK3nt2M027103@khavrinen.lcs.mit.edu>
To: "kai ouyang" <oykai@msn.com>
Cc: Current@FreeBSD.ORG
Subject: Re: Hi,a little question about DP2.
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<<On Wed, 20 Nov 2002 11:39:22 +0800, "kai ouyang" <oykai@msn.com> said:

> I don't know why the 'c' partition doesn't start at 0.
> It is strange.

For backwards compatibility, the FreeBSD 4.x kernel would fake up the
partition tables so that they would look like old (pre-slicing)
FreeBSD partition tables; i.e., the starting offset of the slice would
be subtracted from all of the partition offsets on read and added back
in on write.  The disk partitioning subsystem in 5.x doesn't do this.

-GAWollman


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