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Hello,
Im experiencing a problem with my Software Raid. It has always running without problems. Since this morning Im seeing this line in the /var/log/syslog:
DeviceDisappeared event detected on md device /dev/md0
ls -l /dev/md0
ls: cannot access /dev/md0: No such file or directory
the /etc/mdadm/mdadm.conf:
ARRAY /dev/md0 metadata=1.2 name=server:0 UUID=b9618cfa:bb8d5746:d9c0e036:c9b5e9ef
cat /proc/mdstat is empty :-(
The Strange is as following:
mdadm -Es
ARRAY /dev/md/0 metadata=1.2 UUID=b9618cfa:bb8d5746:d9c0e036:c9b5e9ef name=server:0
ARRAY /dev/md/0 metadata=1.2 UUID=9b19060d:8e418739:fb555db6:8aa82b6c name=server:0
Its an RAID 1 with 2 disks /dev/sdc and /dev/sdd
mdadm --examine /dev/sdd
/dev/sdd:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : b9618cfa:bb8d5746:d9c0e036:c9b5e9ef
Name : server:0 (local to host server)
Creation Time : Mon Feb 24 18:47:54 2014
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 3906887360 (3725.90 GiB 4000.65 GB)
Used Dev Size : 7813774720 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : afa9d760:f35c3b77:0d9c890c:e8c99faa
Update Time : Sun Nov 16 19:27:35 2014
Checksum : 9176e92f - correct
Events : 198
Device Role : Active device 1
Array State : AA ('A' == active, '.' == missing)
madm --examine /dev/sdc
mdadm --examine /dev/sdc
/dev/sdc:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : b9618cfa:bb8d5746:d9c0e036:c9b5e9ef
Name : server:0 (local to host server)
Creation Time : Mon Feb 24 18:47:54 2014
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 3906887360 (3725.90 GiB 4000.65 GB)
Used Dev Size : 7813774720 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 014728f4:c6f041aa:bbec4955:63af2212
Update Time : Sun Nov 16 19:27:35 2014
Checksum : 811507d - correct
Events : 198
Device Role : Active device 0
Array State : AA ('A' == active, '.' == missing)
It seem like its somehow working, but the device /dev/mdo is gone..Can someone tell me how I can reactivate the SW Raid ??
uname -a
Linux server 3.2.0-4-amd64 #1 SMP Debian 3.2.63-2+deb7u1 x86_64 GNU/Linux
cat /etc/debian_version
7.7
Cheers,
- Pascal
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