Listing 2. Setting Up the Software RAID and the LVM Volume Group


# speed up RAID initialization
for f in `find /proc | grep speed`; do
        echo 100000 > $f
done

# create mirrors (mdadm will manage hot spares)
mdadm -C /dev/md1 -l 1 -n 2 \
        /dev/etherd/e0.0 /dev/etherd/e0.1
mdadm -C /dev/md2 -l 1 -n 2 \
        /dev/etherd/e0.2 /dev/etherd/e0.3
mdadm -C /dev/md3 -l 1 -n 2 \
        /dev/etherd/e0.4 /dev/etherd/e0.5
mdadm -C /dev/md4 -l 1 -n 2 -x 2 \
        /dev/etherd/e0.6 /dev/etherd/e0.7 \
        /dev/etherd/e0.8 /dev/etherd/e0.9
sleep 1

# create the stripe over the mirrors
mdadm -C /dev/md0 -l 0 -n 4 \
        /dev/md1 /dev/md2 /dev/md3 /dev/md4

# make the RAID 10 into an LVM physical volume
pvcreate /dev/md0

# create an extendible LVM volume group
vgcreate ben /dev/md0

# look at how many "physical extents" there are
vgdisplay ben | grep -i 'free.*PE'

# create a logical volume using all the space
lvcreate --extents 88349 --name franklin ben

modprobe jfs
mkfs -t jfs /dev/ben/franklin
mkdir /bf
mount /dev/ben/franklin /bf