# cat /etc/debian_version
7.6# mount | grep boot
/dev/md0 on /boot type ext3 (rw,relatime,errors=continue,user_xattr,acl,barrier=1,data=ordered)
# mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Mon Aug 4 10:35:38 2014
Raid Level : raid5
Array Size : 996352 (973.16 MiB 1020.26 MB)
Used Dev Size : 498176 (486.58 MiB 510.13 MB)
Raid Devices : 3
Total Devices : 3
Persistence : Superblock is persistent
Update Time : Mon Aug 4 11:01:48 2014
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Name : debian7:0 (local to host debian7)
UUID : 6b639622:78bfe49f:1537d0fd:d51703eb
Events : 17
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 8 17 1 active sync /dev/sdb1
2 8 33 2 active sync /dev/sdc1