Hi,
I had a raid5 (mdadm V. 3.2.5) with 3 disks. Within an hour 2 disks dropped.
Both disks show smart error 184, but I can still read them.
First I did a full dd-copy of each disk to imagefile image[123] and
wrote it back to a large 4tb disk with 3 partitions.
mdadm -E /dev/sda1
/dev/sda1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 8bf0a3b8:a98e95fd:6a0884e6:fbe6ab09
Name : server:0 (local to host server)
Creation Time : Sun Nov 24 04:21:09 2013
Raid Level : raid5
Raid Devices : 3
Avail Dev Size : 1953262961 (931.39 GiB 1000.07 GB)
Array Size : 1953262592 (1862.78 GiB 2000.14 GB)
Used Dev Size : 1953262592 (931.39 GiB 1000.07 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : 6f793025:415d8c8b:e7d37bbb:19524380
Update Time : Wed Feb 3 10:16:27 2016
Checksum : 74a4a730 - correct
Events : 311
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : .AA ('A' == active, '.' == missing)
mdadm -E /dev/sda2
/dev/sda2:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 8bf0a3b8:a98e95fd:6a0884e6:fbe6ab09
Name : server:0 (local to host server)
Creation Time : Sun Nov 24 04:21:09 2013
Raid Level : raid5
Raid Devices : 3
Avail Dev Size : 1953262961 (931.39 GiB 1000.07 GB)
Array Size : 1953262592 (1862.78 GiB 2000.14 GB)
Used Dev Size : 1953262592 (931.39 GiB 1000.07 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : fc963d80:307b6345:c95b6d94:162c7c7c
Update Time : Wed Feb 3 10:16:40 2016
Checksum : 5eaf449a - correct
Events : 314
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : .A. ('A' == active, '.' == missing)
mdadm -E /dev/sda3
/dev/sda3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 8bf0a3b8:a98e95fd:6a0884e6:fbe6ab09
Name : server:0 (local to host server)
Creation Time : Sun Nov 24 04:21:09 2013
Raid Level : raid5
Raid Devices : 3
Avail Dev Size : 1953262961 (931.39 GiB 1000.07 GB)
Array Size : 1953262592 (1862.78 GiB 2000.14 GB)
Used Dev Size : 1953262592 (931.39 GiB 1000.07 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : 73b1275f:8600a6b4:51234150:e035eef3
Update Time : Wed Feb 3 09:37:09 2016
Checksum : e024ac15 - correct
Events : 217
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAA ('A' == active, '.' == missing)
Seems like sda3 dropped first and big difference in events so I started
only sda1+sda2
mdadm --assemble --force /dev/md0 /dev/sda1 /dev/sda2
Seemed to work and assembled the raid with 2/3 disks clean.
The filesystem is ext4.
Runnung "fsck -y /dev/md0" with lots of errors.
mount -t ext4 /dev/md0 /mnt didnt recognize the filesystem
Should I try --create --assmume-clean sda1 sda2 missing?
I try to stay calm and pray for help.
thx a lot
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