RAID
From Vague Hope Wiki
Contents
Set up
sudo aptitude install mdadm
Create
Set disc type
For each disc:
sudo fdisk /dev/sdb n ; for a new partition enter p ; for a primary partition enter 1 ; number of partition enter ; accept the default enter ; accept the default t ; to change the type fd ; sets the type to be “Linux raid auto detect” (83h) w ; write changes to disk and exit
Create array
sudo mdadm --create --verbose /dev/md0 --level=6 --raid-devices=4 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1 sudo watch cat /proc/mdstat
mdadm.conf
sudo -i mdadm --detail --scan >> /etc/mdadm/mdadm.conf
Though the above does not quite work. Make it look more like this: (remove name or get weird md127 issues)
ARRAY /dev/md0 level=raid6 num-devices=4 metadata=1.2 UUID=659ec2c1:6631ccfd:08dbd99b:5bf050a3
Remember: test by rebooting.
Format
sudo mkfs.ext4 /dev/md0
Mount
Add to `/etc/fstab'. 'nobootwait' is IMPORTANT.
/dev/md0 /media/yama ext4 defaults,errors=remount-ro,nobootwait 0 2
References
- https://help.ubuntu.com/10.04/serverguide/C/advanced-installation.html
- http://warfieldninjas.com/2010/11/ubuntu-software-raid5-and-raid6-with-mdadm/
- http://www.howtogeek.com/51873/how-to-setup-software-raid-for-a-simple-file-server-on-ubuntu/
- http://www.ainer.org/raid-5-6-install-setup-configuration-guide-for-ubuntu-10-04-lts-lucid-lynx/2