Difference between revisions of "RAID"
From Vague Hope Wiki
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sudo fdisk /dev/sdb (and delete part) | sudo fdisk /dev/sdb (and delete part) | ||
lsblk | lsblk | ||
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+ | === Growing === | ||
+ | |||
+ | * TODO | ||
+ | * https://raid.wiki.kernel.org/index.php/Growing | ||
== References == | == References == |
Revision as of 10:58, 23 February 2014
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
GUID type
parted /dev/sda mklabel gpt mkpart primary 0GB 3001GB set 1 raid on
https://www.gnu.org/software/parted/manual/html_chapter/parted_7.html
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.
REMEMBER: run `sudo update-initramfs -u` after editing mdadm.conf.
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
Extra
Test email:
sudo mdadm --monitor --scan --test --oneshot
Set the mdadm configuration to send an Email on startup:
sudo vim /etc/default/mdadm
Add the --test parameter to the DAEMON_OPTIONS:
DAEMON_OPTIONS="--syslog --test"
Removing
lsblk sudo mdadm --stop /dev/md0 sudo mdadm --zero-superblock /dev/sda1 sudo mdadm --zero-superblock /dev/sdb1 sudo fdisk /dev/sda (and delete part) sudo fdisk /dev/sdb (and delete part) lsblk
Growing
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
- http://ubuntuforums.org/showthread.php?t=884556