Subject: overlap, was Re: Work-in-progress "wedges"
implementation To: Jason Thorpe <> From: Bill Studenmund <>
List: tech-kern Date: 09/22/2004 16:55:12 Content-Disposition:
inline Content-Transfer-Encoding: quoted-printable  > Known
issues:          3) What do we want to do about overlapping
wedges? The patch            currently doesn't permit them,
which makes a lot of sense            at first glance - we want
any block on the disk to be opened            by only one wedge
at a time. However there's the MBR format.            It quite
happily makes recursing partition entries.             If each
MBR partition were its own wedge, then it'd be
trivial to have partitioning tools deal with extended=20
partitions. We just create a wedge for the extended partition
then sick the tools on that wedge. Then make an extended=20
partition in there, and repeat. This behavior might also
help import things like FreeBSD slices.             The problems
though are: a) we now have wedge overlap, and            b) I'm
not really sure how one would name the