Hi,
ok your absolutely right. i searched to logfiles in var/log but found nothing about superblock. but as i wrote i worked with phil at this problem and in my outputbox i found an email with information before this:
Here the output oft Option "-D"
--------------------------------------------------------------
mdadm -D /dev/md2
/dev/md2:
Version : 1.2
Creation Time : Tue Jul 24 18:18:21 2012
Raid Level : raid5
Used Dev Size : -1
Raid Devices : 6
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Mon Dec 17 00:13:56 2012
State : active, FAILED, Not Started
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Name : mfsnode1:2 (local to host mfsnode1)
UUID : 92a99ca0:8e22bc66:f8050881:78c344d9
Events : 211768
Number Major Minor RaidDevice State
0 8 4 0 active sync /dev/sda4
1 8 20 1 active sync /dev/sdb4
2 8 36 2 active sync /dev/sdc4
3 0 0 3 removed
4 8 68 4 active sync /dev/sde4
5 0 0 5 removed
--------------------------------------------------------------
mdadm -E /dev/sda4
/dev/sda4:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 92a99ca0:8e22bc66:f8050881:78c344d9
Name : mfsnode1:2 (local to host mfsnode1)
Creation Time : Tue Jul 24 18:18:21 2012
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 5842757597 (2786.04 GiB 2991.49 GB)
Array Size : 29213783040 (13930.22 GiB 14957.46 GB)
Used Dev Size : 5842756608 (2786.04 GiB 2991.49 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 6a679a1d:f42d6b9f:a13cd977:0fdbea86
Update Time : Mon Dec 17 00:13:56 2012
Checksum : 8c50873e - correct
Events : 211768
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAA.A. ('A' == active, '.' == missing)
--------------------------------------------------------------
mdadm -E /dev/sdb4
/dev/sdb4:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 92a99ca0:8e22bc66:f8050881:78c344d9
Name : mfsnode1:2 (local to host mfsnode1)
Creation Time : Tue Jul 24 18:18:21 2012
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 5842757597 (2786.04 GiB 2991.49 GB)
Array Size : 29213783040 (13930.22 GiB 14957.46 GB)
Used Dev Size : 5842756608 (2786.04 GiB 2991.49 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 099f7aa0:9f7a0802:2a874b3a:259431c6
Update Time : Mon Dec 17 00:13:56 2012
Checksum : 73870f28 - correct
Events : 211768
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : AAA.A. ('A' == active, '.' == missing)
--------------------------------------------------------------
mdadm -E /dev/sdc4
/dev/sdc4:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 92a99ca0:8e22bc66:f8050881:78c344d9
Name : mfsnode1:2 (local to host mfsnode1)
Creation Time : Tue Jul 24 18:18:21 2012
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 5842757597 (2786.04 GiB 2991.49 GB)
Array Size : 29213783040 (13930.22 GiB 14957.46 GB)
Used Dev Size : 5842756608 (2786.04 GiB 2991.49 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 41f58710:f1658674:4980a5ae:a9c674b3
Update Time : Mon Dec 17 00:13:56 2012
Checksum : b7af7c56 - correct
Events : 211768
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : AAA.A. ('A' == active, '.' == missing)
--------------------------------------------------------------
mdadm -E /dev/sdd4
/dev/sdd4:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 92a99ca0:8e22bc66:f8050881:78c344d9
Name : mfsnode1:2 (local to host mfsnode1)
Creation Time : Tue Jul 24 18:18:21 2012
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 5842757597 (2786.04 GiB 2991.49 GB)
Array Size : 29213783040 (13930.22 GiB 14957.46 GB)
Used Dev Size : 5842756608 (2786.04 GiB 2991.49 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 53e3bb36:58d746d3:52012491:f518b985
Update Time : Mon Dec 17 00:13:56 2012
Checksum : f16373f1 - correct
Events : 0
Layout : left-symmetric
Chunk Size : 512K
Device Role : spare
Array State : AAA.A. ('A' == active, '.' == missing)
--------------------------------------------------------------
mdadm -E /dev/sde4
/dev/sde4:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 92a99ca0:8e22bc66:f8050881:78c344d9
Name : mfsnode1:2 (local to host mfsnode1)
Creation Time : Tue Jul 24 18:18:21 2012
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 5842756608 (2786.04 GiB 2991.49 GB)
Array Size : 29213783040 (13930.22 GiB 14957.46 GB)
Data Offset : 1024 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 570b6ed0:9be27d23:6db489de:9c5ddf30
Update Time : Mon Dec 17 00:13:56 2012
Checksum : d3dbd252 - correct
Events : 211768
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : AAA.A. ('A' == active, '.' == missing)
--------------------------------------------------------------
mdadm -E /dev/sdf4
/dev/sdf4:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 92a99ca0:8e22bc66:f8050881:78c344d9
Name : mfsnode1:2 (local to host mfsnode1)
Creation Time : Tue Jul 24 18:18:21 2012
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 5842756608 (2786.04 GiB 2991.49 GB)
Array Size : 29213783040 (13930.22 GiB 14957.46 GB)
Data Offset : 1024 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 3718659d:78d3c607:69c0d241:009a0ef6
Update Time : Mon Dec 17 00:13:56 2012
Checksum : ad90dd3a - correct
Events : 0
Layout : left-symmetric
Chunk Size : 512K
Device Role : spare
Array State : AAA.A. ('A' == active, '.' == missing)
--------------------------------------------------------------
cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4]
md2 : inactive sda4[0] sde4[4] sdc4[2] sdb4[1]
11685514699 blocks super 1.2
md1 : active (auto-read-only) raid5 sda3[0] sdf3[5] sde3[4] sdd3[3]
sdc3[2] sdb3[1]
4881920 blocks super 1.2 level 5, 512k chunk, algorithm 2 [6/6]
[UUUUUU]
md0 : active raid1 sda2[0] sdf2[5] sde2[4] sdd2[3] sdc2[2] sdb2[1]
7811464 blocks super 1.2 [6/6] [UUUUUU]
unused devices: <none>
--------------------------------------------------------------
dmesg |grep md2
[ 2.497112] md: md2 stopped.
[ 2.522264] raid5: allocated 6386kB for md2
[ 2.522456] raid5: not enough operational devices for md2 (2/6 failed)
[ 2.522780] raid5: failed to run raid set md2
--------------------------------------------------------------
dmesg |grep sd[a,b,c,d,e,f]4
[ 1.183060] sdf: sdd1 sdd2 sdd3 sdd4
[ 1.211480] sdc1 sdc2 sdc3 sdc4
[ 1.212753] sda1 sda2 sda3 sda4
[ 1.214156] sdb1 sdb2 sdb3 sdb4
[ 1.221997] sdf1 sdf2 sdf3 sdf4
[ 1.249067] sde1 sde2 sde3 sde4
[ 2.502642] md: bind<sdb4>
[ 2.505288] md: bind<sdc4>
[ 2.505426] md: bind<sde4>
[ 2.505521] md: bind<sdf4>
[ 2.505613] md: export_rdev(sdd4)
[ 2.505823] md: bind<sda4>
[ 2.505884] md: kicking non-fresh sdf4 from array!
[ 2.505898] md: unbind<sdf4>
[ 2.520389] md: export_rdev(sdf4)
[ 2.521897] raid5: device sda4 operational as raid disk 0
[ 2.521900] raid5: device sde4 operational as raid disk 4
[ 2.521902] raid5: device sdc4 operational as raid disk 2
[ 2.521904] raid5: device sdb4 operational as raid disk 1
[ 2.522510] disk 0, o:1, dev:sda4
[ 2.522512] disk 1, o:1, dev:sdb4
[ 2.522513] disk 2, o:1, dev:sdc4
[ 2.522515] disk 4, o:1, dev:sde4
------------------------------------------------
behaps this could bring light in the dark
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