Let's imagine for a second, hypothetically, that some drunk girl sees Blinkenlights on the RAID array in your garage and says (reportedly) "Oh neat, hot swap!", and proceeds to remove 3 drives from a particular 5-disk RAID-5 array, instantly killing the party music and a quite a bit of other data [accessibility].
Hypothetically, that would look like this: (after a reboot, incidentally)
# cat /proc/mdstat Personalities : [linear] [raid0] [raid1] [raid6] [raid5] [raid4] md1 : inactive sda sde sdd sdc sdb 2441932480 blocks super non-persistent md0 : active raid1 sdf1 sdg1 97659008 blocks [2/2] [UU] unused devices: <none>
Since I'm currently in Grass Valley for nick's wedding, enjoying the ~110F heat (it was 113F/45C on the way up here!), I'll leave it to you guys, my friendly LazyWeb, to suggest how one might fix such a busted array, perhaps saving me some time reading mdadm(8).