Prøv denne kommando på både /dev/sdaX og på /dev/sdbX
mdadm --examine /dev/sdaX
og se om du ikke bliver klogere!
server:/# mdadm --examine /dev/sdb1
alleservices:/# mdadm --examine /dev/sdb1
/dev/sdb1:
Magic : a92b4efc
Version : 00.90.00
UUID : 33d73757:8ec6d1ee:b001ecdd:d9181222
Creation Time : Tue Sep 15 18:55:01 2009
Raid Level : raid1
Device Size : 104320 (101.89 MiB 106.82 MB)
Array Size : 104320 (101.89 MiB 106.82 MB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 0
Update Time : Thu Sep 17 11:48:19 2009
State : clean
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Checksum : 8a46bde8 - correct
Events : 0.217
Number Major Minor RaidDevice State
this 1 8 17 1 active sync /dev/sdb1
0 0 0 0 0 removed
1 1 8 17 1 active sync /dev/sdb1