Creating 15TB RAID0 Drive from 5x 3TB disks

Notes for the record. RAID0: No redundancy, pure performance.
Using: Software-raid / parted / GPT / Alignment-issues / LVM

mdadm --create --verbose /dev/md0 --level=0 \
	--raid-devices=5 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf 

parted -a optimal /dev/md0
or
parted --align=opt /dev/md0

	mklabel gpt
	mkpart primary 0T 15T
	quit
pvcreate /dev/md0p1 
vgcreate vg99 /dev/md0p1 
# Create 12TB partition
lvcreate -L 12T -n bkup vg99
mkfs.ext4 -L bkup /dev/vg99/bkup
mkdir /bkup
mount /dev/vg99/bkup /bkup

Remove a RAID signature from a disk:

dmraid -r -E /dev/sdc


Fix for: The resulting partition is not properly aligned for best performance : Used "-a optimal" and start at 0T rather than just 0

Remove an Array

mdadm --detail /dev/md127 
mdadm --stop /dev/md127
mdadm --zero-superblock /dev/sdb
mdadm --zero-superblock /dev/sdc
mdadm --zero-superblock /dev/sdd
mdadm --zero-superblock /dev/sde
mdadm --zero-superblock /dev/sdf
mdadm --zero-superblock /dev/sdg

Document History
Fri Jul 13 10:29:34 NZST 2012 c.mills Created
Clark Mills c.mills@auckland.ac.nz