Comment 67 for bug 557429

Documented at <https://wiki.ubuntu.com/LucidLynx/ReleaseNotes#Use%20of%20degraded%20RAID%201%20array%20may%20cause%20data%20loss%20in%20exceptional%20cases>:

If each member of a RAID 1 array is separately brought up in degraded mode across subsequent runs of the array with no reassembly in between, there is a risk that the disks will be reported as in sync when they are not, resulting in data loss due to inconsistencies between the data that has been written to each member. This is an unlikely occurrence during normal operations, but admins of systems using RAID 1 arrays should take care during maintenance to avoid this situation. (557429)