I have a raid 1 device with two disks when I stop the device in RHEL5
# mdadm --stop /dev/md4
mdadm: stopped /dev/md4
# mdadm --detail /dev/md4
mdadm: md device /dev/md4 does not appear to be active.
How does one start it up again?
# mdadm --examine /dev/sdd2
/dev/sdd2:
Magic : a92b4efc
Version : 00.90.00
UUID : 7b7baf26:99e09886:0c35124d:40736950
Creation Time : Fri Sep 12 16:17:50 2008
Raid Level : raid1
Used Dev Size : 71280320 (67.98 GiB 72.99 GB)
Array Size : 71280320 (67.98 GiB 72.99 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 4
Update Time : Fri Sep 12 16:17:50 2008
State : active
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Checksum : a105ab5f - correct
Events : 0.1
Number Major Minor RaidDevice State
this 1 8 50 1 active sync /dev/sdd2
0 0 8 34 0 active sync /dev/sdc2
1 1 8 50 1 active sync /dev/sdd2
# mdadm --examine /dev/sdc2
/dev/sdc2:
Magic : a92b4efc
Version : 00.90.00
UUID : 7b7baf26:99e09886:0c35124d:40736950
Creation Time : Fri Sep 12 16:17:50 2008
Raid Level : raid1
Used Dev Size : 71280320 (67.98 GiB 72.99 GB)
Array Size : 71280320 (67.98 GiB 72.99 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 4
Update Time : Fri Sep 12 16:17:50 2008
State : active
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Checksum : a105ab4d - correct
Events : 0.1
Number Major Minor RaidDevice State
this 0 8 34 0 active sync /dev/sdc2
0 0 8 34 0 active sync /dev/sdc2
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