Logical volume that spans raid1 sets: what happens if a RAID fails?
- by Jeff Shattock
Consider the following scenario:
/dev/md0 - 10GB RAID 1 volume built from /dev/sda and /dev/sdb
/dev/md1 - 10GB RAID 1 volume built from /dev/sdc and /dev/sdd
/dev/vg0 - volume group containing md0 and md1
/dev/vg0/lv0 - 15GB logical volume
The raid devices are created with mdadm; the logical volumes by LVM.
What happens to lv0 if md0 fails…