jacob@Gandalf:/dev$ sudo mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sat Apr 15 12:03:04 2017
Raid Level : raid1
Array Size : 244007936 (232.70 GiB 249.86 GB)
Used Dev Size : 244007936 (232.70 GiB 249.86 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Sun Jul 2 15:38:41 2017
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : Gandalf:0 (local to host Gandalf)
UUID : 725fc30d:5061e46a:2826c844:41e0e06b
Events : 546
Number Major Minor RaidDevice State
0 8 17 0 active sync /dev/sdb1
1 8 33 1 active sync /dev/sdc1