On Tue, 17 Nov 2009 12:19:48 PST
Orvar Korvar <knatte_fnatte_tjatte at yahoo.com> wrote:
> Also, a zpool is built up from groups (vdev) of discs. Each group
> can be raidz1/raidz2/mirrors/etc. You can add several groups to a
> zpool. But you can never add/remove discs from an existing vdev. A
> vdev is fixed.
This has been said several times, but it's not entirely accurate.
You *can* add and remove disks from an existing vdev, provided that
the vdev is a mirror. The terminology may not be quite right if you
start or end with a single drive, but "zpool detach" and "zpool
attach" still work.
Which brings up the one feature that FreeBSD geom had that I miss in
zfs/zpool: it gave names to it's vdevs. Possibly more later.
<mike
--
Mike Meyer <mwm at mired.org> http://www.mired.org/consulting.html
Independent Network/Unix/Perforce consultant, email for more information.
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