I've got a two disk raid and I want to it and convert the
disks to some non-raid usage. The raid was never used and has no data.
Also, the raid disks are encrypted along with the rest of the disk
in the machine.
When I try to stop raid I get the following:
# mdadm --stop /dev/md127
mdadm: Cannot get exclusive access to /dev/md127:Perhaps a running process,
mounted filesystem or active volume group?
Googling about this there are a number of folks hitting this problem
over a number of fedora releases. Sadly, I could not find any fix.
For some the solution (nuclear solutions) was to use a different linux
distro or reinstall. I've got a lot of data on other disks on this system
and
really don't want to use a nuclear solution.
Background information:
$ uname -a
Linux medusa 3.17.7-200.fc20.x86_64 #1 SMP Wed Dec 17 03:35:33 UTC 2014
x86_64 x86_64 x86_64 GNU/Linux
MDADM
# mdadm --misc --detail /dev/md127
Version : 1.2
Creation Time : Fri Apr 25 17:19:52 2014
Raid Level : raid1
Array Size : 3906885632 (3725.90 GiB 4000.65 GB)
Used Dev Size : 3906885632 (3725.90 GiB 4000.65 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Sun Feb 1 09:37:32 2015
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : localhost.localdomain:raid1
UUID : be78cb55:f26bbf2b:7ad9b344:a2427875
Events : 8527
Number Major Minor RaidDevice State
0 8 33 0 active sync /dev/sdc1
1 8 49 1 active sync /dev/sdd1
MDADM.CONF
# cat /etc/mdadm.conf
# mdadm.conf written out by anaconda
MAILADDR root
AUTO +imsm +1.x -all
ARRAY /dev/md/raid1 level=raid1 num-devices=2
UUID=be78cb55:f26bbf2b:7ad9b344:a2427875
LSOF
# lsof | grep md127
md127_rai 1044 root cwd DIR 253,1
4096 2 /
md127_rai 1044 root rtd DIR 253,1
4096 2 /
md127_rai 1044 root txt
unknown /proc/1044/exe
udisksd 2120 root 13r REG 0,15
4096 30332 /sys/devices/virtual/block/md127/md/sync_action
udisksd 2120 root 14r REG 0,15
4096 30345 /sys/devices/virtual/block/md127/md/degraded
gmain 2120 2121 root 13r REG 0,15
4096 30332 /sys/devices/virtual/block/md127/md/sync_action
gmain 2120 2121 root 14r REG 0,15
4096 30345 /sys/devices/virtual/block/md127/md/degraded
gdbus 2120 2123 root 13r REG 0,15
4096 30332 /sys/devices/virtual/block/md127/md/sync_action
gdbus 2120 2123 root 14r REG 0,15
4096 30345 /sys/devices/virtual/block/md127/md/degraded
probing-t 2120 2124 root 13r REG 0,15
4096 30332 /sys/devices/virtual/block/md127/md/sync_action
probing-t 2120 2124 root 14r REG 0,15
4096 30345 /sys/devices/virtual/block/md127/md/degraded
cleanup 2120 2125 root 13r REG 0,15
4096 30332 /sys/devices/virtual/block/md127/md/sync_action
cleanup 2120 2125 root 14r REG 0,15
4096 30345 /sys/devices/virtual/block/md127/md/degraded
FSTAB ENTRY
/dev/mapper/luks-ab8911f9-b3a4-4f33-8b10-7e52c7217ae9
/raid1 ext4 defaults,x-systemd.device-timeout=0 1 2
BY-UUID
# ls -l /dev/disk/by-uuid/ | grep md127
lrwxrwxrwx. 1 root root 11 Jan 10 19:32
ab8911f9-b3a4-4f33-8b10-7e52c7217ae9 -> ../../md127
Thanks
Richard
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