====== Software_RAID_on_Linux ======

Repairing a degraded raid mirror. Assuming sdb1 has fallen out of the mirror:

Check to see if the disk thinks it should be in the array
<code bash>
mdadm -E /dev/md0
mdadm -E /dev/sdb1
mdadm -E /dev/sda1
</code>

Readd the missing disk
<code bash>
mdadm /dev/md0 -a /dev/sdb1
</code>

Check to see the array is rebuilding
<code bash>
mdadm -D /dev/md0
</code>