On 17/11/14 03:43 PM, pas...@denbekker.de wrote:
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
Try to assemble the array with just one disk (list the other one as
missing). If it comes up, then shut it down and assemble it with the
other disk. If both seem to work, then assemble it with both disks.
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