sam

brew install redis
redis-cli hset services resque '["localhost"]'
jgem install rack -v1.3.6
jgem install jruby-rack -v1.1.1
jgem install trinidad -v1.2.3
git clone git://github.com/sam/geminaboxplus.git
cd geminaboxplus
bundle install --path vendor
rake resque:work &
GEMINABOX_DATA="$(pwd)/data" jruby -S trinidad

sam

# Make sure that the swap volume is the same size as your available RAM or
# you'll have trouble starting as many guests as you think you should have
# RAM for.
zfs create -oprimarycache=none -osecondarycache=none -V256G zones/swap

sam

# Attach your new "spare" device (c0t1d0 in this example)
# to your existing device (c0t0d0) as a mirror:
zpool attach zones c0t0d0 c0t1d0
# Wait until `zpool status` says resilvering is complete, then:
zpool detach zones c0t0d0

sam

dumpadm -d /dev/dsk/c0t2d0

sam

zpool create backup \
spare c1t0d0 c1t1d0 c1t2d0 \
raidz2 c1t3d0  c1t4d0  c1t5d0  c1t6d0  c1t7d0  c1t8d0  c1t9d0 \
raidz2 c1t10d0 c1t11d0 c1t12d0 c1t13d0 c1t14d0 c1t15d0 c1t16d0 \
raidz2 c1t17d0 c1t18d0 c1t19d0 c1t20d0 c1t21d0 c1t22d0 c1t23d0

sam

zfs snapshot -r zones@backup
zfs send -R zones@backup | zfs recv -Fd backup

sam

zpool destroy -f zones
# If that doesn't work because some filesystems are still in use, run:
zfs destroy -fr zones
# That will force unmount and destroy all the filesystems.
# Then try destroying the zpool again.

sam

zpool export backup
zpool import backup zones

sam

zpool add zones spare c1t0d0

sam

[root@f0-4d-a2-3c-f4-a0 ~]# zpool status
  pool: zones
 state: ONLINE
  scan: none requested
config:

        NAME         STATE     READ WRITE CKSUM
        zones        ONLINE       0     0     0
          raidz2-0   ONLINE       0     0     0
            c1t3d0   ONLINE       0     0     0