mdadm
2011-11-15 - some mdadm command examples
Tags: linux toolbox
Watch the array status
watch -d -n10 mdadm --detail /dev/md127
Recovery from livecd
mdadm --examine --scan >> /etc/mdadm.conf
mdadm --assemble --scan /dev/md/root
mount /dev/md127 /mnt # or vgscan...
If auto detection does not work, you can still assemble an array manually :
mdadm --assemble /dev/md0 /dev/sda1 /dev/sdb1
Resync an array
First rigorously check the output of cat /proc/mdstat
mdadm --manage --re-add /dev/md0 /dev/sdb1
Destroy an array
mdadm --stop /dev/md0
mdadm --zero-superblock /dev/sda
mdadm --zero-superblock /dev/sdb