multipath - pv, vg, lv and format

rescan disks

# ls /sys/class/scsi_host
host0  host1  host10  host11  host12  host2  host3  host4  host5  host6  host7  host8  host9

# echo '- - -' > /sys/class/scsi_host/host0/scan
# echo '- - -' > /sys/class/scsi_host/host1/scan
....
# echo '- - -' > /sys/class/scsi_host/host12/scan

start the multipathing device mapper target autoconfig.

# multipath -v2

list the multipath devices that have been created.

# multipath -ll (dmesg is useful too)

create device maps from partition tables.

# kpartx -a -v /dev/mapper/mpath#

create physical Volume.

# pvcreate /dev/mapper/mpathf

create Volume Group.

# vgcreate vgdata /dev/mapper/mpathf
    volume group "vgdata" successfully creted

create Logical Volume.

# lvcreate -l 100%free -n lvdata vgdata
   Logical volume "lvdata" created.

format disk.

# mkfs.xfs /dev/mapper/vgdata/lvdata

create a mount point

# mkdir /data
# mount /dev/vgdata/lvdata /data

and remember to edit /etc/fstab