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ccd mirroring and ccdxc
- To: misc_(_at_)_openbsd_(_dot_)_org
- Subject: ccd mirroring and ccdxc
- From: Bobby Johnson <bobby_(_at_)_plexuscomp_(_dot_)_com>
- Date: Tue, 27 Dec 2005 10:39:27 -0700
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.
Visit your host, monkey.org