ccd mirroring and ccdxc

[Bobby Johnson <bobby_(_at_)_plexuscomp_(_dot_)_com>]

A few questions in regards to the discussion between Robert Haarman and
mickey around Nov 24 on ccd mirroring.  The conclusion is don't use c
for a usable partition in a ccd device.

This sounds fine until I try to recover from a disk failure.  When I use
the c partition in a ccd mirror device I can unconfigure the ccd and
mount each half of the mirror seperately.  So if a hard disk were to
fail I could edit my fstab and the server could be back up quickly.
With any other partition scheme this seems impossible, and would require
a dd before the filesystem could be mounted.

Mickey's reasoning behind not using c is that the real disk's label will
get trashed.  I don't see how this is possible if the real disks are
setup properly.  My real disks are setup with a small unused a
partition, with d and e setup for the ccd mirrors.  c is then used
inside each ccd for the main filesystem.

Bobby Johnson