QNAP 8 port RAID5 md0 unmountable defective md superblocks

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Hello list

Currently I've the a mdadm system here with unmountable volume due to disk (timeout and badblocks) failures. I transfered the disk already to new HDs.

Question: for this is a RAID5 the only redundant disk was lost to a timeout sometime in the past and the second (/dev/sdf) had tons of BadBlocks in the first and last 5MBs. I reconstructed the partition table (as all 8 disks are build the same way), but how could I glue the mdadm system together again. After that I'd start an integrity check of the mdadm volume and afterwards an fsck. I attach the "mdadm --examine /dev/sd*" so you might consider looking upon my problem

the md0 is found, but the md superblocks are missing on four of the 8
disks.
Question: Where is this superblock located so I can see if it was damaged
(badBlock). Is there a way to reconstruct this md superblock?

A "cat /proc/mdstat"give md0 a inactive (because of the lost redundancy)


The inability to mount the md0 is the main problem; the other md arrays are uninteresting so far. The md0 consists of 8 disks combined into a RAID5 Array; sometimes in the past one disk seems to be spilled out (timeout which is quite a common problem with the WD Caviar Green Editions due to their missing TLER feature). At 21.4 the /dev/sdf had BadBlocks in the MBR/PT section and the array collapsed. The contact with QNAP brought a few hints, but mainly: bring the backup into action and rebuild. That's as much as I know about. All other actions have been readonly to analyze. I've been the first to transfer the data to Nearline Storage disks and looking a bit more into the system. In the month waiting it seems two other disks seems to have badblocks gathered as I could not explain the missing md superblocks with anything else. Hitting such a critical area with such a low amount of BadBlocks puzzles me somehow.

Here's the mdadm --examine /dev/sd*:

/dev/sda:
   MBR Magic : aa55
Partition[0] :      1060250 sectors at           40 (type 83)
Partition[1] :      1060284 sectors at      1060296 (type 83)
Partition[2] :   3903891386 sectors at      2120584 (type 83)
Partition[3] :       996024 sectors at   3906011976 (type 83)
/dev/sda1:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 05105cec:26fef0b4:bf3f9508:05f7c111
  Creation Time : Sun Jan 27 18:38:01 2013
     Raid Level : raid1
  Used Dev Size : 530048 (517.71 MiB 542.77 MB)
     Array Size : 530048 (517.71 MiB 542.77 MB)
   Raid Devices : 8
  Total Devices : 5
Preferred Minor : 9

    Update Time : Mon Dec 16 14:05:54 2013
          State : clean
Internal Bitmap : present
 Active Devices : 5
Working Devices : 5
 Failed Devices : 2
  Spare Devices : 0
       Checksum : 3e2e7326 - correct
         Events : 763


      Number   Major   Minor   RaidDevice State
this     2       8        1        2      active sync   /dev/sda1

   0     0       0        0        0      removed
   1     1       8       17        1      active sync   /dev/sdb1
   2     2       8        1        2      active sync   /dev/sda1
   3     3       8       65        3      active sync   /dev/sde1
   4     4       8       97        4      active sync   /dev/sdg1
   5     5       0        0        5      faulty removed
   6     6       8      113        6      active sync   /dev/sdh1
   7     7       0        0        7      faulty removed
/dev/sda2:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 39e8ca2f:3cfff703:4de89223:ac2a0c13
  Creation Time : Thu Mar  7 09:41:55 2013
     Raid Level : raid1
  Used Dev Size : 530048 (517.71 MiB 542.77 MB)
     Array Size : 530048 (517.71 MiB 542.77 MB)
   Raid Devices : 2
  Total Devices : 5
Preferred Minor : 126

    Update Time : Mon Dec 16 14:46:37 2013
          State : clean
 Active Devices : 2
Working Devices : 5
 Failed Devices : 0
  Spare Devices : 3
       Checksum : be161f0b - correct
         Events : 59


      Number   Major   Minor   RaidDevice State
this     4       8        2        4      spare   /dev/sda2

   0     0       8       50        0      active sync   /dev/sdd2
   1     1       8      114        1      active sync   /dev/sdh2
   2     2       8       98        2      spare   /dev/sdg2
   3     3       8       82        3      spare   /dev/sdf2
   4     4       8        2        4      spare   /dev/sda2
/dev/sda3:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 52d7d080:5c40de46:bc741f30:65cb5a0d
  Creation Time : Sun Jan 27 23:10:25 2013
     Raid Level : raid5
  Used Dev Size : 1951945600 (1861.52 GiB 1998.79 GB)
     Array Size : 13663619200 (13030.64 GiB 13991.55 GB)
   Raid Devices : 8
  Total Devices : 7
Preferred Minor : 0

    Update Time : Sun Apr 21 14:14:49 2013
          State : active
 Active Devices : 7
Working Devices : 7
 Failed Devices : 1
  Spare Devices : 0
       Checksum : 91564c42 - correct
         Events : 136

         Layout : left-symmetric
     Chunk Size : 64K

      Number   Major   Minor   RaidDevice State
this     3       8       51        3      active sync   /dev/sdd3

   0     0       8        3        0      active sync   /dev/sda3
   1     1       0        0        1      faulty removed
   2     2       8       35        2      active sync   /dev/sdc3
   3     3       8       51        3      active sync   /dev/sdd3
   4     4       8       67        4      active sync   /dev/sde3
   5     5       8       83        5      active sync   /dev/sdf3
   6     6       8       99        6      active sync   /dev/sdg3
   7     7       8      115        7      active sync   /dev/sdh3
/dev/sda4:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 4bfc2d50:283e9f67:803faac1:21814c31
  Creation Time : Sun Jan 27 18:38:10 2013
     Raid Level : raid1
  Used Dev Size : 458880 (448.20 MiB 469.89 MB)
     Array Size : 458880 (448.20 MiB 469.89 MB)
   Raid Devices : 8
  Total Devices : 7
Preferred Minor : 13

    Update Time : Mon Dec 16 14:05:54 2013
          State : clean
Internal Bitmap : present
 Active Devices : 7
Working Devices : 7
 Failed Devices : 1
  Spare Devices : 0
       Checksum : 62e299b3 - correct
         Events : 4355


      Number   Major   Minor   RaidDevice State
this     5       8        4        5      active sync   /dev/sda4

   0     0       8       36        0      active sync   /dev/sdc4
   1     1       8      116        1      active sync   /dev/sdh4
   2     2       8       52        2      active sync   /dev/sdd4
   3     3       8      100        3      active sync   /dev/sdg4
   4     4       8       68        4      active sync   /dev/sde4
   5     5       8        4        5      active sync   /dev/sda4
   6     6       8       20        6      active sync   /dev/sdb4
   7     7       0        0        7      faulty removed
/dev/sdb:
   MBR Magic : aa55
Partition[0] :      1060250 sectors at           40 (type 83)
Partition[1] :      1060284 sectors at      1060296 (type 83)
Partition[2] :   3903891386 sectors at      2120584 (type 83)
Partition[3] :       996024 sectors at   3906011976 (type 83)
/dev/sdb1:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 05105cec:26fef0b4:bf3f9508:05f7c111
  Creation Time : Sun Jan 27 18:38:01 2013
     Raid Level : raid1
  Used Dev Size : 530048 (517.71 MiB 542.77 MB)
     Array Size : 530048 (517.71 MiB 542.77 MB)
   Raid Devices : 8
  Total Devices : 5
Preferred Minor : 9

    Update Time : Mon Dec 16 14:05:54 2013
          State : clean
Internal Bitmap : present
 Active Devices : 5
Working Devices : 5
 Failed Devices : 2
  Spare Devices : 0
       Checksum : 3e2e7334 - correct
         Events : 763


      Number   Major   Minor   RaidDevice State
this     1       8       17        1      active sync   /dev/sdb1

   0     0       0        0        0      removed
   1     1       8       17        1      active sync   /dev/sdb1
   2     2       8        1        2      active sync   /dev/sda1
   3     3       8       65        3      active sync   /dev/sde1
   4     4       8       97        4      active sync   /dev/sdg1
   5     5       0        0        5      faulty removed
   6     6       8      113        6      active sync   /dev/sdh1
   7     7       0        0        7      faulty removed
/dev/sdb4:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 4bfc2d50:283e9f67:803faac1:21814c31
  Creation Time : Sun Jan 27 18:38:10 2013
     Raid Level : raid1
  Used Dev Size : 458880 (448.20 MiB 469.89 MB)
     Array Size : 458880 (448.20 MiB 469.89 MB)
   Raid Devices : 8
  Total Devices : 7
Preferred Minor : 13

    Update Time : Mon Dec 16 14:05:54 2013
          State : clean
Internal Bitmap : present
 Active Devices : 7
Working Devices : 7
 Failed Devices : 1
  Spare Devices : 0
       Checksum : 62e299c5 - correct
         Events : 4355


      Number   Major   Minor   RaidDevice State
this     6       8       20        6      active sync   /dev/sdb4

   0     0       8       36        0      active sync   /dev/sdc4
   1     1       8      116        1      active sync   /dev/sdh4
   2     2       8       52        2      active sync   /dev/sdd4
   3     3       8      100        3      active sync   /dev/sdg4
   4     4       8       68        4      active sync   /dev/sde4
   5     5       8        4        5      active sync   /dev/sda4
   6     6       8       20        6      active sync   /dev/sdb4
   7     7       0        0        7      faulty removed
/dev/sdc:
   MBR Magic : aa55
Partition[0] :      1060250 sectors at           40 (type 83)
Partition[1] :      1060284 sectors at      1060296 (type 83)
Partition[2] :   3903891386 sectors at      2120584 (type 83)
Partition[3] :       996024 sectors at   3906011976 (type 83)
/dev/sdc1:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 05105cec:26fef0b4:bf3f9508:05f7c111
  Creation Time : Sun Jan 27 18:38:01 2013
     Raid Level : raid1
  Used Dev Size : 530048 (517.71 MiB 542.77 MB)
     Array Size : 530048 (517.71 MiB 542.77 MB)
   Raid Devices : 8
  Total Devices : 8
Preferred Minor : 9

    Update Time : Sun Apr 21 14:00:12 2013
          State : clean
Internal Bitmap : present
 Active Devices : 8
Working Devices : 8
 Failed Devices : 0
  Spare Devices : 0
       Checksum : 3cf34b80 - correct
         Events : 440


      Number   Major   Minor   RaidDevice State
this     0       8       17        0      active sync   /dev/sdb1

   0     0       8       17        0      active sync   /dev/sdb1
   1     1       8       49        1      active sync   /dev/sdd1
   2     2       8        1        2      active sync   /dev/sda1
   3     3       8       33        3      active sync   /dev/sdc1
   4     4       8       65        4      active sync   /dev/sde1
   5     5       8       81        5      active sync   /dev/sdf1
   6     6       8      113        6      active sync   /dev/sdh1
   7     7       8       97        7      active sync   /dev/sdg1
/dev/sdc2:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 39e8ca2f:3cfff703:4de89223:ac2a0c13
  Creation Time : Thu Mar  7 09:41:55 2013
     Raid Level : raid1
  Used Dev Size : 530048 (517.71 MiB 542.77 MB)
     Array Size : 530048 (517.71 MiB 542.77 MB)
   Raid Devices : 2
  Total Devices : 8
Preferred Minor : 8

    Update Time : Thu Mar  7 09:42:20 2013
          State : clean
 Active Devices : 2
Working Devices : 8
 Failed Devices : 0
  Spare Devices : 6
       Checksum : bc9f6dd7 - correct
         Events : 31


      Number   Major   Minor   RaidDevice State
this     1       8       18        1      active sync   /dev/sdb2

   0     0       8        2        0      active sync   /dev/sda2
   1     1       8       18        1      active sync   /dev/sdb2
   2     2       8      114        2      spare   /dev/sdh2
   3     3       8       98        3      spare   /dev/sdg2
   4     4       8       82        4      spare   /dev/sdf2
   5     5       8       66        5      spare   /dev/sde2
   6     6       8       50        6      spare   /dev/sdd2
   7     7       8       34        7      spare   /dev/sdc2
/dev/sdc3:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 52d7d080:5c40de46:bc741f30:65cb5a0d
  Creation Time : Sun Jan 27 23:10:25 2013
     Raid Level : raid5
  Used Dev Size : 1951945600 (1861.52 GiB 1998.79 GB)
     Array Size : 13663619200 (13030.64 GiB 13991.55 GB)
   Raid Devices : 8
  Total Devices : 8
Preferred Minor : 0

    Update Time : Sun Apr 21 14:06:49 2013
          State : active
 Active Devices : 8
Working Devices : 8
 Failed Devices : 0
  Spare Devices : 0
       Checksum : 91564a57 - correct
         Events : 135

         Layout : left-symmetric
     Chunk Size : 64K

      Number   Major   Minor   RaidDevice State
this     1       8       19        1      active sync   /dev/sdb3

   0     0       8        3        0      active sync   /dev/sda3
   1     1       8       19        1      active sync   /dev/sdb3
   2     2       8       35        2      active sync   /dev/sdc3
   3     3       8       51        3      active sync   /dev/sdd3
   4     4       8       67        4      active sync   /dev/sde3
   5     5       8       83        5      active sync   /dev/sdf3
   6     6       8       99        6      active sync   /dev/sdg3
   7     7       8      115        7      active sync   /dev/sdh3
/dev/sdc4:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 4bfc2d50:283e9f67:803faac1:21814c31
  Creation Time : Sun Jan 27 18:38:10 2013
     Raid Level : raid1
  Used Dev Size : 458880 (448.20 MiB 469.89 MB)
     Array Size : 458880 (448.20 MiB 469.89 MB)
   Raid Devices : 8
  Total Devices : 7
Preferred Minor : 13

    Update Time : Mon Dec 16 14:05:54 2013
          State : clean
Internal Bitmap : present
 Active Devices : 7
Working Devices : 7
 Failed Devices : 1
  Spare Devices : 0
       Checksum : 62e299c9 - correct
         Events : 4355


      Number   Major   Minor   RaidDevice State
this     0       8       36        0      active sync   /dev/sdc4

   0     0       8       36        0      active sync   /dev/sdc4
   1     1       8      116        1      active sync   /dev/sdh4
   2     2       8       52        2      active sync   /dev/sdd4
   3     3       8      100        3      active sync   /dev/sdg4
   4     4       8       68        4      active sync   /dev/sde4
   5     5       8        4        5      active sync   /dev/sda4
   6     6       8       20        6      active sync   /dev/sdb4
   7     7       0        0        7      faulty removed
/dev/sdd:
   MBR Magic : aa55
Partition[0] :      1060250 sectors at           40 (type 83)
Partition[1] :      1060284 sectors at      1060296 (type 83)
Partition[2] :   3903891386 sectors at      2120584 (type 83)
Partition[3] :       996024 sectors at   3906011976 (type 83)
/dev/sdd1:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 05105cec:26fef0b4:bf3f9508:05f7c111
  Creation Time : Sun Jan 27 18:38:01 2013
     Raid Level : raid1
  Used Dev Size : 530048 (517.71 MiB 542.77 MB)
     Array Size : 530048 (517.71 MiB 542.77 MB)
   Raid Devices : 8
  Total Devices : 6
Preferred Minor : 9

    Update Time : Tue Sep 17 12:47:24 2013
          State : active
Internal Bitmap : present
 Active Devices : 6
Working Devices : 6
 Failed Devices : 2
  Spare Devices : 0
       Checksum : 3db7a8d2 - correct
         Events : 723


      Number   Major   Minor   RaidDevice State
this     0       8        1        0      active sync   /dev/sda1

   0     0       8        1        0      active sync   /dev/sda1
   1     1       8       33        1      active sync   /dev/sdc1
   2     2       8       49        2      active sync   /dev/sdd1
   3     3       8       65        3      active sync   /dev/sde1
   4     4       8       97        4      active sync   /dev/sdg1
   5     5       0        0        5      faulty removed
   6     6       8      113        6      active sync   /dev/sdh1
   7     7       0        0        7      faulty removed
/dev/sdd2:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 39e8ca2f:3cfff703:4de89223:ac2a0c13
  Creation Time : Thu Mar  7 09:41:55 2013
     Raid Level : raid1
  Used Dev Size : 530048 (517.71 MiB 542.77 MB)
     Array Size : 530048 (517.71 MiB 542.77 MB)
   Raid Devices : 2
  Total Devices : 5
Preferred Minor : 126

    Update Time : Mon Dec 16 14:05:54 2013
          State : clean
 Active Devices : 2
Working Devices : 5
 Failed Devices : 0
  Spare Devices : 3
       Checksum : be1615ae - correct
         Events : 59


      Number   Major   Minor   RaidDevice State
this     0       8       50        0      active sync   /dev/sdd2

   0     0       8       50        0      active sync   /dev/sdd2
   1     1       8      114        1      active sync   /dev/sdh2
   2     2       8       98        2      spare   /dev/sdg2
   3     3       8       82        3      spare   /dev/sdf2
   4     4       8        2        4      spare   /dev/sda2
/dev/sdd4:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 4bfc2d50:283e9f67:803faac1:21814c31
  Creation Time : Sun Jan 27 18:38:10 2013
     Raid Level : raid1
  Used Dev Size : 458880 (448.20 MiB 469.89 MB)
     Array Size : 458880 (448.20 MiB 469.89 MB)
   Raid Devices : 8
  Total Devices : 7
Preferred Minor : 13

    Update Time : Mon Dec 16 14:05:54 2013
          State : clean
Internal Bitmap : present
 Active Devices : 7
Working Devices : 7
 Failed Devices : 1
  Spare Devices : 0
       Checksum : 62e299dd - correct
         Events : 4355


      Number   Major   Minor   RaidDevice State
this     2       8       52        2      active sync   /dev/sdd4

   0     0       8       36        0      active sync   /dev/sdc4
   1     1       8      116        1      active sync   /dev/sdh4
   2     2       8       52        2      active sync   /dev/sdd4
   3     3       8      100        3      active sync   /dev/sdg4
   4     4       8       68        4      active sync   /dev/sde4
   5     5       8        4        5      active sync   /dev/sda4
   6     6       8       20        6      active sync   /dev/sdb4
   7     7       0        0        7      faulty removed
/dev/sde:
   MBR Magic : aa55
Partition[0] :      1060250 sectors at           40 (type 83)
Partition[1] :      1060284 sectors at      1060296 (type 83)
Partition[2] :   3903891386 sectors at      2120584 (type 83)
Partition[3] :       996024 sectors at   3906011976 (type 83)
/dev/sde1:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 05105cec:26fef0b4:bf3f9508:05f7c111
  Creation Time : Sun Jan 27 18:38:01 2013
     Raid Level : raid1
  Used Dev Size : 530048 (517.71 MiB 542.77 MB)
     Array Size : 530048 (517.71 MiB 542.77 MB)
   Raid Devices : 8
  Total Devices : 5
Preferred Minor : 9

    Update Time : Mon Dec 16 14:05:54 2013
          State : clean
Internal Bitmap : present
 Active Devices : 5
Working Devices : 5
 Failed Devices : 2
  Spare Devices : 0
       Checksum : 3e2e7368 - correct
         Events : 763


      Number   Major   Minor   RaidDevice State
this     3       8       65        3      active sync   /dev/sde1

   0     0       0        0        0      removed
   1     1       8       17        1      active sync   /dev/sdb1
   2     2       8        1        2      active sync   /dev/sda1
   3     3       8       65        3      active sync   /dev/sde1
   4     4       8       97        4      active sync   /dev/sdg1
   5     5       0        0        5      faulty removed
   6     6       8      113        6      active sync   /dev/sdh1
   7     7       0        0        7      faulty removed
/dev/sde2:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 39e8ca2f:3cfff703:4de89223:ac2a0c13
  Creation Time : Thu Mar  7 09:41:55 2013
     Raid Level : raid1
  Used Dev Size : 530048 (517.71 MiB 542.77 MB)
     Array Size : 530048 (517.71 MiB 542.77 MB)
   Raid Devices : 2
  Total Devices : 5
Preferred Minor : 8

    Update Time : Fri Dec 13 12:02:41 2013
          State : clean
 Active Devices : 2
Working Devices : 5
 Failed Devices : 0
  Spare Devices : 3
       Checksum : be1203d3 - correct
         Events : 57


      Number   Major   Minor   RaidDevice State
this     3       8       66        3      spare   /dev/sde2

   0     0       8       50        0      active sync   /dev/sdd2
   1     1       8      114        1      active sync   /dev/sdh2
   2     2       8        2        2      spare   /dev/sda2
   3     3       8       66        3      spare   /dev/sde2
   4     4       8       98        4      spare   /dev/sdg2
/dev/sde3:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 52d7d080:5c40de46:bc741f30:65cb5a0d
  Creation Time : Sun Jan 27 23:10:25 2013
     Raid Level : raid5
  Used Dev Size : 1951945600 (1861.52 GiB 1998.79 GB)
     Array Size : 13663619200 (13030.64 GiB 13991.55 GB)
   Raid Devices : 8
  Total Devices : 7
Preferred Minor : 0

    Update Time : Sun Apr 21 14:14:49 2013
          State : active
 Active Devices : 7
Working Devices : 7
 Failed Devices : 1
  Spare Devices : 0
       Checksum : 91564c54 - correct
         Events : 136

         Layout : left-symmetric
     Chunk Size : 64K

      Number   Major   Minor   RaidDevice State
this     4       8       67        4      active sync   /dev/sde3

   0     0       8        3        0      active sync   /dev/sda3
   1     1       0        0        1      faulty removed
   2     2       8       35        2      active sync   /dev/sdc3
   3     3       8       51        3      active sync   /dev/sdd3
   4     4       8       67        4      active sync   /dev/sde3
   5     5       8       83        5      active sync   /dev/sdf3
   6     6       8       99        6      active sync   /dev/sdg3
   7     7       8      115        7      active sync   /dev/sdh3
/dev/sde4:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 4bfc2d50:283e9f67:803faac1:21814c31
  Creation Time : Sun Jan 27 18:38:10 2013
     Raid Level : raid1
  Used Dev Size : 458880 (448.20 MiB 469.89 MB)
     Array Size : 458880 (448.20 MiB 469.89 MB)
   Raid Devices : 8
  Total Devices : 7
Preferred Minor : 13

    Update Time : Mon Dec 16 14:05:54 2013
          State : clean
Internal Bitmap : present
 Active Devices : 7
Working Devices : 7
 Failed Devices : 1
  Spare Devices : 0
       Checksum : 62e299f1 - correct
         Events : 4355


      Number   Major   Minor   RaidDevice State
this     4       8       68        4      active sync   /dev/sde4

   0     0       8       36        0      active sync   /dev/sdc4
   1     1       8      116        1      active sync   /dev/sdh4
   2     2       8       52        2      active sync   /dev/sdd4
   3     3       8      100        3      active sync   /dev/sdg4
   4     4       8       68        4      active sync   /dev/sde4
   5     5       8        4        5      active sync   /dev/sda4
   6     6       8       20        6      active sync   /dev/sdb4
   7     7       0        0        7      faulty removed
/dev/sdf:
   MBR Magic : aa55
Partition[0] :      1060250 sectors at           40 (type 83)
Partition[1] :      1060284 sectors at      1060296 (type 83)
Partition[2] :   3903891386 sectors at      2120584 (type 83)
Partition[3] :       996024 sectors at   3906011976 (type 83)
/dev/sdf1:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 05105cec:26fef0b4:bf3f9508:05f7c111
  Creation Time : Sun Jan 27 18:38:01 2013
     Raid Level : raid1
  Used Dev Size : 530048 (517.71 MiB 542.77 MB)
     Array Size : 530048 (517.71 MiB 542.77 MB)
   Raid Devices : 8
  Total Devices : 7
Preferred Minor : 9

    Update Time : Sun Apr 21 14:50:18 2013
          State : active
Internal Bitmap : present
 Active Devices : 5
Working Devices : 5
 Failed Devices : 2
  Spare Devices : 0
       Checksum : 3cf355e6 - correct
         Events : 449


      Number   Major   Minor   RaidDevice State
this     5       8       81        5      active sync   /dev/sdf1

   0     0       0        0        0      removed
   1     1       0        0        1      faulty removed
   2     2       8        1        2      active sync   /dev/sda1
   3     3       8       33        3      active sync   /dev/sdc1
   4     4       0        0        4      faulty removed
   5     5       8       81        5      active sync   /dev/sdf1
   6     6       8      113        6      active sync   /dev/sdh1
   7     7       8       97        7      active sync   /dev/sdg1
/dev/sdf2:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 39e8ca2f:3cfff703:4de89223:ac2a0c13
  Creation Time : Thu Mar  7 09:41:55 2013
     Raid Level : raid1
  Used Dev Size : 530048 (517.71 MiB 542.77 MB)
     Array Size : 530048 (517.71 MiB 542.77 MB)
   Raid Devices : 2
  Total Devices : 5
Preferred Minor : 126

    Update Time : Mon Dec 16 14:46:37 2013
          State : clean
 Active Devices : 2
Working Devices : 5
 Failed Devices : 0
  Spare Devices : 3
       Checksum : be161f59 - correct
         Events : 59


      Number   Major   Minor   RaidDevice State
this     3       8       82        3      spare   /dev/sdf2

   0     0       8       50        0      active sync   /dev/sdd2
   1     1       8      114        1      active sync   /dev/sdh2
   2     2       8       98        2      spare   /dev/sdg2
   3     3       8       82        3      spare   /dev/sdf2
   4     4       8        2        4      spare   /dev/sda2
/dev/sdf4:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 4bfc2d50:283e9f67:803faac1:21814c31
  Creation Time : Sun Jan 27 18:38:10 2013
     Raid Level : raid1
  Used Dev Size : 458880 (448.20 MiB 469.89 MB)
     Array Size : 458880 (448.20 MiB 469.89 MB)
   Raid Devices : 8
  Total Devices : 7
Preferred Minor : 13

    Update Time : Wed Apr 24 14:30:56 2013
          State : clean
Internal Bitmap : present
 Active Devices : 5
Working Devices : 5
 Failed Devices : 2
  Spare Devices : 0
       Checksum : 61ab5765 - correct
         Events : 1178


      Number   Major   Minor   RaidDevice State
this     5       8       84        5      active sync   /dev/sdf4

   0     0       0        0        0      removed
   1     1       0        0        1      faulty removed
   2     2       8        4        2      active sync   /dev/sda4
   3     3       8       36        3      active sync   /dev/sdc4
   4     4       0        0        4      faulty removed
   5     5       8       84        5      active sync   /dev/sdf4
   6     6       8      116        6      active sync   /dev/sdh4
   7     7       8      100        7      active sync   /dev/sdg4
/dev/sdg:
   MBR Magic : aa55
Partition[0] :      1060250 sectors at           40 (type 83)
Partition[1] :      1060284 sectors at      1060296 (type 83)
Partition[2] :   3903891386 sectors at      2120584 (type 83)
Partition[3] :       996024 sectors at   3906011976 (type 83)
/dev/sdg1:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 05105cec:26fef0b4:bf3f9508:05f7c111
  Creation Time : Sun Jan 27 18:38:01 2013
     Raid Level : raid1
  Used Dev Size : 530048 (517.71 MiB 542.77 MB)
     Array Size : 530048 (517.71 MiB 542.77 MB)
   Raid Devices : 8
  Total Devices : 5
Preferred Minor : 9

    Update Time : Mon Dec 16 14:05:54 2013
          State : clean
Internal Bitmap : present
 Active Devices : 5
Working Devices : 5
 Failed Devices : 2
  Spare Devices : 0
       Checksum : 3e2e738a - correct
         Events : 763


      Number   Major   Minor   RaidDevice State
this     4       8       97        4      active sync   /dev/sdg1

   0     0       0        0        0      removed
   1     1       8       17        1      active sync   /dev/sdb1
   2     2       8        1        2      active sync   /dev/sda1
   3     3       8       65        3      active sync   /dev/sde1
   4     4       8       97        4      active sync   /dev/sdg1
   5     5       0        0        5      faulty removed
   6     6       8      113        6      active sync   /dev/sdh1
   7     7       0        0        7      faulty removed
/dev/sdg2:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 39e8ca2f:3cfff703:4de89223:ac2a0c13
  Creation Time : Thu Mar  7 09:41:55 2013
     Raid Level : raid1
  Used Dev Size : 530048 (517.71 MiB 542.77 MB)
     Array Size : 530048 (517.71 MiB 542.77 MB)
   Raid Devices : 2
  Total Devices : 5
Preferred Minor : 126

    Update Time : Mon Dec 16 14:46:37 2013
          State : clean
 Active Devices : 2
Working Devices : 5
 Failed Devices : 0
  Spare Devices : 3
       Checksum : be161f67 - correct
         Events : 59


      Number   Major   Minor   RaidDevice State
this     2       8       98        2      spare   /dev/sdg2

   0     0       8       50        0      active sync   /dev/sdd2
   1     1       8      114        1      active sync   /dev/sdh2
   2     2       8       98        2      spare   /dev/sdg2
   3     3       8       82        3      spare   /dev/sdf2
   4     4       8        2        4      spare   /dev/sda2
/dev/sdg4:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 4bfc2d50:283e9f67:803faac1:21814c31
  Creation Time : Sun Jan 27 18:38:10 2013
     Raid Level : raid1
  Used Dev Size : 458880 (448.20 MiB 469.89 MB)
     Array Size : 458880 (448.20 MiB 469.89 MB)
   Raid Devices : 8
  Total Devices : 7
Preferred Minor : 13

    Update Time : Mon Dec 16 14:05:54 2013
          State : clean
Internal Bitmap : present
 Active Devices : 7
Working Devices : 7
 Failed Devices : 1
  Spare Devices : 0
       Checksum : 62e29a0f - correct
         Events : 4355


      Number   Major   Minor   RaidDevice State
this     3       8      100        3      active sync   /dev/sdg4

   0     0       8       36        0      active sync   /dev/sdc4
   1     1       8      116        1      active sync   /dev/sdh4
   2     2       8       52        2      active sync   /dev/sdd4
   3     3       8      100        3      active sync   /dev/sdg4
   4     4       8       68        4      active sync   /dev/sde4
   5     5       8        4        5      active sync   /dev/sda4
   6     6       8       20        6      active sync   /dev/sdb4
   7     7       0        0        7      faulty removed
/dev/sdh:
   MBR Magic : aa55
Partition[0] :      1060250 sectors at           40 (type 83)
Partition[1] :      1060284 sectors at      1060296 (type 83)
Partition[2] :   3903891386 sectors at      2120584 (type 83)
Partition[3] :       996024 sectors at   3906011976 (type 83)
/dev/sdh1:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 05105cec:26fef0b4:bf3f9508:05f7c111
  Creation Time : Sun Jan 27 18:38:01 2013
     Raid Level : raid1
  Used Dev Size : 530048 (517.71 MiB 542.77 MB)
     Array Size : 530048 (517.71 MiB 542.77 MB)
   Raid Devices : 8
  Total Devices : 5
Preferred Minor : 9

    Update Time : Mon Dec 16 14:05:54 2013
          State : clean
Internal Bitmap : present
 Active Devices : 5
Working Devices : 5
 Failed Devices : 2
  Spare Devices : 0
       Checksum : 3e2e739e - correct
         Events : 763


      Number   Major   Minor   RaidDevice State
this     6       8      113        6      active sync   /dev/sdh1

   0     0       0        0        0      removed
   1     1       8       17        1      active sync   /dev/sdb1
   2     2       8        1        2      active sync   /dev/sda1
   3     3       8       65        3      active sync   /dev/sde1
   4     4       8       97        4      active sync   /dev/sdg1
   5     5       0        0        5      faulty removed
   6     6       8      113        6      active sync   /dev/sdh1
   7     7       0        0        7      faulty removed
/dev/sdh2:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 39e8ca2f:3cfff703:4de89223:ac2a0c13
  Creation Time : Thu Mar  7 09:41:55 2013
     Raid Level : raid1
  Used Dev Size : 530048 (517.71 MiB 542.77 MB)
     Array Size : 530048 (517.71 MiB 542.77 MB)
   Raid Devices : 2
  Total Devices : 5
Preferred Minor : 126

    Update Time : Mon Dec 16 14:05:54 2013
          State : clean
 Active Devices : 2
Working Devices : 5
 Failed Devices : 0
  Spare Devices : 3
       Checksum : be1615f0 - correct
         Events : 59


      Number   Major   Minor   RaidDevice State
this     1       8      114        1      active sync   /dev/sdh2

   0     0       8       50        0      active sync   /dev/sdd2
   1     1       8      114        1      active sync   /dev/sdh2
   2     2       8       98        2      spare   /dev/sdg2
   3     3       8       82        3      spare   /dev/sdf2
   4     4       8        2        4      spare   /dev/sda2
/dev/sdh3:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 52d7d080:5c40de46:bc741f30:65cb5a0d
  Creation Time : Sun Jan 27 23:10:25 2013
     Raid Level : raid5
  Used Dev Size : 1951945600 (1861.52 GiB 1998.79 GB)
     Array Size : 13663619200 (13030.64 GiB 13991.55 GB)
   Raid Devices : 8
  Total Devices : 7
Preferred Minor : 0

    Update Time : Sun Apr 21 14:14:49 2013
          State : active
 Active Devices : 7
Working Devices : 7
 Failed Devices : 1
  Spare Devices : 0
       Checksum : 91564c8a - correct
         Events : 136

         Layout : left-symmetric
     Chunk Size : 64K

      Number   Major   Minor   RaidDevice State
this     7       8      115        7      active sync   /dev/sdh3

   0     0       8        3        0      active sync   /dev/sda3
   1     1       0        0        1      faulty removed
   2     2       8       35        2      active sync   /dev/sdc3
   3     3       8       51        3      active sync   /dev/sdd3
   4     4       8       67        4      active sync   /dev/sde3
   5     5       8       83        5      active sync   /dev/sdf3
   6     6       8       99        6      active sync   /dev/sdg3
   7     7       8      115        7      active sync   /dev/sdh3
/dev/sdh4:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 4bfc2d50:283e9f67:803faac1:21814c31
  Creation Time : Sun Jan 27 18:38:10 2013
     Raid Level : raid1
  Used Dev Size : 458880 (448.20 MiB 469.89 MB)
     Array Size : 458880 (448.20 MiB 469.89 MB)
   Raid Devices : 8
  Total Devices : 7
Preferred Minor : 13

    Update Time : Mon Dec 16 14:05:54 2013
          State : clean
Internal Bitmap : present
 Active Devices : 7
Working Devices : 7
 Failed Devices : 1
  Spare Devices : 0
       Checksum : 62e29a1b - correct
         Events : 4355


      Number   Major   Minor   RaidDevice State
this     1       8      116        1      active sync   /dev/sdh4

   0     0       8       36        0      active sync   /dev/sdc4
   1     1       8      116        1      active sync   /dev/sdh4
   2     2       8       52        2      active sync   /dev/sdd4
   3     3       8      100        3      active sync   /dev/sdg4
   4     4       8       68        4      active sync   /dev/sde4
   5     5       8        4        5      active sync   /dev/sda4
   6     6       8       20        6      active sync   /dev/sdb4
   7     7       0        0        7      faulty removed
/dev/sdj:
   MBR Magic : aa55
Partition[0] :         4320 sectors at           32 (type 83)
Partition[1] :       484608 sectors at         4352 (type 83)
Partition[2] :       484608 sectors at       488960 (type 83)
Partition[3] :        34048 sectors at       973568 (type 05)
/dev/sdj4:
   MBR Magic : aa55
Partition[0] :        16608 sectors at           32 (type 83)
Partition[1] :        17408 sectors at        16640 (type 05)




Any hints? My first thought was restoring/copying/generating the md superblock on all missing four member disks.

Hope anyone got some better insight and inspiration than me :-)

Cheers
Michael Samer


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