とりあえずRAID10 xfs

parted  /dev/sdb mklabel gpt
parted  /dev/sdc mklabel gpt
parted  /dev/sdd mklabel gpt
parted  /dev/sde mklabel gpt

parted  /dev/sdb unit s 
parted  /dev/sdc unit s 
parted  /dev/sdd unit s 
parted  /dev/sde unit s 

parted  /dev/sdb mkpart primary 2048s 100%
parted  /dev/sdc mkpart primary 2048s 100%
parted  /dev/sdd mkpart primary 2048s 100%
parted  /dev/sde mkpart primary 2048s 100%

parted  /dev/sdb align-check opt 1
parted  /dev/sdc align-check opt 1
parted  /dev/sdd align-check opt 1
parted  /dev/sde align-check opt 1

parted  /dev/sdb set 1 raid on
parted  /dev/sdc set 1 raid on
parted  /dev/sdd set 1 raid on
parted  /dev/sde set 1 raid on
mdadm --misc --stop /dev/md127
mdadm  --create --verbose --assume-clean \
 /dev/md127 --level=10 --raid-devices=4 --chunk=4096 \
 --layout=n2 /dev/sd[bcde]1


xfs_admin -L foltiatv /dev/md127

tv 3.6T 192G 3.4T 6% /tv
(zfs)