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Thread: Raid 6 Failure During Reshape (Among Other Problems)

  1. #31
    Join Date
    Sep 2008
    Location
    Netherlands
    Beans
    369
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Raid 6 Failure During Reshape (Among Other Problems)!

    Ofcourse, how can I forget that flag...
    I've seen cases that survived without, but I would never go without it indeed!

  2. #32
    Join Date
    Sep 2013
    Beans
    16

    Re: Raid 6 Failure During Reshape (Among Other Problems)

    Rubylaser:

    Code:
    > sudo mdadm -E /dev/sd[bcdefghijkl]1/dev/sdb1:
              Magic : a92b4efc
            Version : 0.90.00
               UUID : e7db05b0:4a9008b8:98883325:0d269d95
      Creation Time : Sun Mar 21 22:38:08 2010
         Raid Level : raid6
      Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
         Array Size : 8790839424 (8383.60 GiB 9001.82 GB)
       Raid Devices : 11
      Total Devices : 11
    Preferred Minor : 0
    
    
        Update Time : Tue Oct  1 22:27:29 2013
              State : clean
     Active Devices : 11
    Working Devices : 11
     Failed Devices : 0
      Spare Devices : 0
           Checksum : 5974a37f - correct
             Events : 116984
    
    
             Layout : left-symmetric
         Chunk Size : 64K
    
    
          Number   Major   Minor   RaidDevice State
    this     6       8       17        6      active sync   /dev/sdb1
    
    
       0     0       8      129        0      active sync   /dev/sdi1
       1     1       8       81        1      active sync   /dev/sdf1
       2     2       8       33        2      active sync   /dev/sdc1
       3     3       8      113        3      active sync   /dev/sdh1
       4     4       8       49        4      active sync   /dev/sdd1
       5     5       8       97        5      active sync   /dev/sdg1
       6     6       8       17        6      active sync   /dev/sdb1
       7     7       8       65        7      active sync   /dev/sde1
       8     8       8      161        8      active sync   /dev/sdk1
       9     9       8      145        9      active sync   /dev/sdj1
      10    10       8      177       10      active sync   /dev/sdl1
    /dev/sdc1:
              Magic : a92b4efc
            Version : 0.90.00
               UUID : e7db05b0:4a9008b8:98883325:0d269d95
      Creation Time : Sun Mar 21 22:38:08 2010
         Raid Level : raid6
      Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
         Array Size : 8790839424 (8383.60 GiB 9001.82 GB)
       Raid Devices : 11
      Total Devices : 11
    Preferred Minor : 0
    
    
        Update Time : Tue Oct  1 22:27:29 2013
              State : clean
     Active Devices : 11
    Working Devices : 11
     Failed Devices : 0
      Spare Devices : 0
           Checksum : 5974a387 - correct
             Events : 116984
    
    
             Layout : left-symmetric
         Chunk Size : 64K
    
    
          Number   Major   Minor   RaidDevice State
    this     2       8       33        2      active sync   /dev/sdc1
    
    
       0     0       8      129        0      active sync   /dev/sdi1
       1     1       8       81        1      active sync   /dev/sdf1
       2     2       8       33        2      active sync   /dev/sdc1
       3     3       8      113        3      active sync   /dev/sdh1
       4     4       8       49        4      active sync   /dev/sdd1
       5     5       8       97        5      active sync   /dev/sdg1
       6     6       8       17        6      active sync   /dev/sdb1
       7     7       8       65        7      active sync   /dev/sde1
       8     8       8      161        8      active sync   /dev/sdk1
       9     9       8      145        9      active sync   /dev/sdj1
      10    10       8      177       10      active sync   /dev/sdl1
    /dev/sdd1:
              Magic : a92b4efc
            Version : 0.90.00
               UUID : e7db05b0:4a9008b8:98883325:0d269d95
      Creation Time : Sun Mar 21 22:38:08 2010
         Raid Level : raid6
      Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
         Array Size : 8790839424 (8383.60 GiB 9001.82 GB)
       Raid Devices : 11
      Total Devices : 11
    Preferred Minor : 0
    
    
        Update Time : Tue Oct  1 22:27:29 2013
              State : clean
     Active Devices : 11
    Working Devices : 11
     Failed Devices : 0
      Spare Devices : 0
           Checksum : 5974a39b - correct
             Events : 116984
    
    
             Layout : left-symmetric
         Chunk Size : 64K
    
    
          Number   Major   Minor   RaidDevice State
    this     4       8       49        4      active sync   /dev/sdd1
    
    
       0     0       8      129        0      active sync   /dev/sdi1
       1     1       8       81        1      active sync   /dev/sdf1
       2     2       8       33        2      active sync   /dev/sdc1
       3     3       8      113        3      active sync   /dev/sdh1
       4     4       8       49        4      active sync   /dev/sdd1
       5     5       8       97        5      active sync   /dev/sdg1
       6     6       8       17        6      active sync   /dev/sdb1
       7     7       8       65        7      active sync   /dev/sde1
       8     8       8      161        8      active sync   /dev/sdk1
       9     9       8      145        9      active sync   /dev/sdj1
      10    10       8      177       10      active sync   /dev/sdl1
    /dev/sde1:
              Magic : a92b4efc
            Version : 0.90.00
               UUID : e7db05b0:4a9008b8:98883325:0d269d95
      Creation Time : Sun Mar 21 22:38:08 2010
         Raid Level : raid6
      Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
         Array Size : 8790839424 (8383.60 GiB 9001.82 GB)
       Raid Devices : 11
      Total Devices : 11
    Preferred Minor : 0
    
    
        Update Time : Tue Oct  1 22:27:29 2013
              State : clean
     Active Devices : 11
    Working Devices : 11
     Failed Devices : 0
      Spare Devices : 0
           Checksum : 5974a3b1 - correct
             Events : 116984
    
    
             Layout : left-symmetric
         Chunk Size : 64K
    
    
          Number   Major   Minor   RaidDevice State
    this     7       8       65        7      active sync   /dev/sde1
    
    
       0     0       8      129        0      active sync   /dev/sdi1
       1     1       8       81        1      active sync   /dev/sdf1
       2     2       8       33        2      active sync   /dev/sdc1
       3     3       8      113        3      active sync   /dev/sdh1
       4     4       8       49        4      active sync   /dev/sdd1
       5     5       8       97        5      active sync   /dev/sdg1
       6     6       8       17        6      active sync   /dev/sdb1
       7     7       8       65        7      active sync   /dev/sde1
       8     8       8      161        8      active sync   /dev/sdk1
       9     9       8      145        9      active sync   /dev/sdj1
      10    10       8      177       10      active sync   /dev/sdl1
    /dev/sdf1:
              Magic : a92b4efc
            Version : 0.90.00
               UUID : e7db05b0:4a9008b8:98883325:0d269d95
      Creation Time : Sun Mar 21 22:38:08 2010
         Raid Level : raid6
      Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
         Array Size : 8790839424 (8383.60 GiB 9001.82 GB)
       Raid Devices : 11
      Total Devices : 11
    Preferred Minor : 0
    
    
        Update Time : Tue Oct  1 22:27:29 2013
              State : clean
     Active Devices : 11
    Working Devices : 11
     Failed Devices : 0
      Spare Devices : 0
           Checksum : 5974a3b5 - correct
             Events : 116984
    
    
             Layout : left-symmetric
         Chunk Size : 64K
    
    
          Number   Major   Minor   RaidDevice State
    this     1       8       81        1      active sync   /dev/sdf1
    
    
       0     0       8      129        0      active sync   /dev/sdi1
       1     1       8       81        1      active sync   /dev/sdf1
       2     2       8       33        2      active sync   /dev/sdc1
       3     3       8      113        3      active sync   /dev/sdh1
       4     4       8       49        4      active sync   /dev/sdd1
       5     5       8       97        5      active sync   /dev/sdg1
       6     6       8       17        6      active sync   /dev/sdb1
       7     7       8       65        7      active sync   /dev/sde1
       8     8       8      161        8      active sync   /dev/sdk1
       9     9       8      145        9      active sync   /dev/sdj1
      10    10       8      177       10      active sync   /dev/sdl1
    /dev/sdg1:
              Magic : a92b4efc
            Version : 0.90.00
               UUID : e7db05b0:4a9008b8:98883325:0d269d95
      Creation Time : Sun Mar 21 22:38:08 2010
         Raid Level : raid6
      Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
         Array Size : 8790839424 (8383.60 GiB 9001.82 GB)
       Raid Devices : 11
      Total Devices : 11
    Preferred Minor : 0
    
    
        Update Time : Tue Oct  1 22:27:29 2013
              State : clean
     Active Devices : 11
    Working Devices : 11
     Failed Devices : 0
      Spare Devices : 0
           Checksum : 5974a3cd - correct
             Events : 116984
    
    
             Layout : left-symmetric
         Chunk Size : 64K
    
    
          Number   Major   Minor   RaidDevice State
    this     5       8       97        5      active sync   /dev/sdg1
    
    
       0     0       8      129        0      active sync   /dev/sdi1
       1     1       8       81        1      active sync   /dev/sdf1
       2     2       8       33        2      active sync   /dev/sdc1
       3     3       8      113        3      active sync   /dev/sdh1
       4     4       8       49        4      active sync   /dev/sdd1
       5     5       8       97        5      active sync   /dev/sdg1
       6     6       8       17        6      active sync   /dev/sdb1
       7     7       8       65        7      active sync   /dev/sde1
       8     8       8      161        8      active sync   /dev/sdk1
       9     9       8      145        9      active sync   /dev/sdj1
      10    10       8      177       10      active sync   /dev/sdl1
    /dev/sdh1:
              Magic : a92b4efc
            Version : 0.90.00
               UUID : e7db05b0:4a9008b8:98883325:0d269d95
      Creation Time : Sun Mar 21 22:38:08 2010
         Raid Level : raid6
      Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
         Array Size : 8790839424 (8383.60 GiB 9001.82 GB)
       Raid Devices : 11
      Total Devices : 11
    Preferred Minor : 0
    
    
        Update Time : Tue Oct  1 22:27:29 2013
              State : clean
     Active Devices : 11
    Working Devices : 11
     Failed Devices : 0
      Spare Devices : 0
           Checksum : 5974a3d9 - correct
             Events : 116984
    
    
             Layout : left-symmetric
         Chunk Size : 64K
    
    
          Number   Major   Minor   RaidDevice State
    this     3       8      113        3      active sync   /dev/sdh1
    
    
       0     0       8      129        0      active sync   /dev/sdi1
       1     1       8       81        1      active sync   /dev/sdf1
       2     2       8       33        2      active sync   /dev/sdc1
       3     3       8      113        3      active sync   /dev/sdh1
       4     4       8       49        4      active sync   /dev/sdd1
       5     5       8       97        5      active sync   /dev/sdg1
       6     6       8       17        6      active sync   /dev/sdb1
       7     7       8       65        7      active sync   /dev/sde1
       8     8       8      161        8      active sync   /dev/sdk1
       9     9       8      145        9      active sync   /dev/sdj1
      10    10       8      177       10      active sync   /dev/sdl1
    /dev/sdi1:
              Magic : a92b4efc
            Version : 0.90.00
               UUID : e7db05b0:4a9008b8:98883325:0d269d95
      Creation Time : Sun Mar 21 22:38:08 2010
         Raid Level : raid6
      Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
         Array Size : 8790839424 (8383.60 GiB 9001.82 GB)
       Raid Devices : 11
      Total Devices : 11
    Preferred Minor : 0
    
    
        Update Time : Tue Oct  1 22:27:29 2013
              State : clean
     Active Devices : 11
    Working Devices : 11
     Failed Devices : 0
      Spare Devices : 0
           Checksum : 5974a3e3 - correct
             Events : 116984
    
    
             Layout : left-symmetric
         Chunk Size : 64K
    
    
          Number   Major   Minor   RaidDevice State
    this     0       8      129        0      active sync   /dev/sdi1
    
    
       0     0       8      129        0      active sync   /dev/sdi1
       1     1       8       81        1      active sync   /dev/sdf1
       2     2       8       33        2      active sync   /dev/sdc1
       3     3       8      113        3      active sync   /dev/sdh1
       4     4       8       49        4      active sync   /dev/sdd1
       5     5       8       97        5      active sync   /dev/sdg1
       6     6       8       17        6      active sync   /dev/sdb1
       7     7       8       65        7      active sync   /dev/sde1
       8     8       8      161        8      active sync   /dev/sdk1
       9     9       8      145        9      active sync   /dev/sdj1
      10    10       8      177       10      active sync   /dev/sdl1
    /dev/sdj1:
              Magic : a92b4efc
            Version : 0.90.00
               UUID : e7db05b0:4a9008b8:98883325:0d269d95
      Creation Time : Sun Mar 21 22:38:08 2010
         Raid Level : raid6
      Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
         Array Size : 8790839424 (8383.60 GiB 9001.82 GB)
       Raid Devices : 11
      Total Devices : 11
    Preferred Minor : 0
    
    
        Update Time : Tue Oct  1 22:27:29 2013
              State : clean
     Active Devices : 11
    Working Devices : 11
     Failed Devices : 0
      Spare Devices : 0
           Checksum : 5974a405 - correct
             Events : 116984
    
    
             Layout : left-symmetric
         Chunk Size : 64K
    
    
          Number   Major   Minor   RaidDevice State
    this     9       8      145        9      active sync   /dev/sdj1
    
    
       0     0       8      129        0      active sync   /dev/sdi1
       1     1       8       81        1      active sync   /dev/sdf1
       2     2       8       33        2      active sync   /dev/sdc1
       3     3       8      113        3      active sync   /dev/sdh1
       4     4       8       49        4      active sync   /dev/sdd1
       5     5       8       97        5      active sync   /dev/sdg1
       6     6       8       17        6      active sync   /dev/sdb1
       7     7       8       65        7      active sync   /dev/sde1
       8     8       8      161        8      active sync   /dev/sdk1
       9     9       8      145        9      active sync   /dev/sdj1
      10    10       8      177       10      active sync   /dev/sdl1
    /dev/sdk1:
              Magic : a92b4efc
            Version : 0.90.00
               UUID : e7db05b0:4a9008b8:98883325:0d269d95
      Creation Time : Sun Mar 21 22:38:08 2010
         Raid Level : raid6
      Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
         Array Size : 8790839424 (8383.60 GiB 9001.82 GB)
       Raid Devices : 11
      Total Devices : 11
    Preferred Minor : 0
    
    
        Update Time : Tue Oct  1 22:27:29 2013
              State : clean
     Active Devices : 11
    Working Devices : 11
     Failed Devices : 0
      Spare Devices : 0
           Checksum : 5974a413 - correct
             Events : 116984
    
    
             Layout : left-symmetric
         Chunk Size : 64K
    
    
          Number   Major   Minor   RaidDevice State
    this     8       8      161        8      active sync   /dev/sdk1
    
    
       0     0       8      129        0      active sync   /dev/sdi1
       1     1       8       81        1      active sync   /dev/sdf1
       2     2       8       33        2      active sync   /dev/sdc1
       3     3       8      113        3      active sync   /dev/sdh1
       4     4       8       49        4      active sync   /dev/sdd1
       5     5       8       97        5      active sync   /dev/sdg1
       6     6       8       17        6      active sync   /dev/sdb1
       7     7       8       65        7      active sync   /dev/sde1
       8     8       8      161        8      active sync   /dev/sdk1
       9     9       8      145        9      active sync   /dev/sdj1
      10    10       8      177       10      active sync   /dev/sdl1
    /dev/sdl1:
              Magic : a92b4efc
            Version : 0.90.00
               UUID : e7db05b0:4a9008b8:98883325:0d269d95
      Creation Time : Sun Mar 21 22:38:08 2010
         Raid Level : raid6
      Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
         Array Size : 8790839424 (8383.60 GiB 9001.82 GB)
       Raid Devices : 11
      Total Devices : 11
    Preferred Minor : 0
    
    
        Update Time : Tue Oct  1 22:27:29 2013
              State : clean
     Active Devices : 11
    Working Devices : 11
     Failed Devices : 0
      Spare Devices : 0
           Checksum : 5974a427 - correct
             Events : 116984
    
    
             Layout : left-symmetric
         Chunk Size : 64K
    
    
          Number   Major   Minor   RaidDevice State
    this    10       8      177       10      active sync   /dev/sdl1
    
    
       0     0       8      129        0      active sync   /dev/sdi1
       1     1       8       81        1      active sync   /dev/sdf1
       2     2       8       33        2      active sync   /dev/sdc1
       3     3       8      113        3      active sync   /dev/sdh1
       4     4       8       49        4      active sync   /dev/sdd1
       5     5       8       97        5      active sync   /dev/sdg1
       6     6       8       17        6      active sync   /dev/sdb1
       7     7       8       65        7      active sync   /dev/sde1
       8     8       8      161        8      active sync   /dev/sdk1
       9     9       8      145        9      active sync   /dev/sdj1
      10    10       8      177       10      active sync   /dev/sdl1
    I also do believe that my data is still in fact intact. While I was rebuilding the first time (before the drive failed, and even after), I was able to mount and see data. The only time I have not been able to is after rebuilding and recovering.

  3. #33
    Join Date
    Jul 2010
    Location
    Michigan, USA
    Beans
    2,081
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Raid 6 Failure During Reshape (Among Other Problems)

    Based on the metadata from each of your disks, the event counters are exactly the same and the disk order identical (this is a good thing), you need to stop the running array, and re-assemble in the proper order. Based on the metadata, the following should be the proper order. Let me know how it goes.

    Code:
    mdadm -S /dev/md0
    mdadm --assemble /dev/md0 /dev/sd[ifchdgbekjl]1

  4. #34
    Join Date
    Sep 2013
    Beans
    16

    Re: Raid 6 Failure During Reshape (Among Other Problems)

    Code:
    sudo mdadm --assemble /dev/md0 /dev/sd[ifchdgbekjl]1
    mdadm: /dev/md0 has been started with 11 drives.
    Code:
    sudo mdadm --detail /dev/md0/dev/md0:
            Version : 0.90
      Creation Time : Sun Mar 21 22:38:08 2010
         Raid Level : raid6
         Array Size : 8790839424 (8383.60 GiB 9001.82 GB)
      Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
       Raid Devices : 11
      Total Devices : 11
    Preferred Minor : 0
        Persistence : Superblock is persistent
    
    
        Update Time : Tue Oct  1 22:27:29 2013
              State : clean 
     Active Devices : 11
    Working Devices : 11
     Failed Devices : 0
      Spare Devices : 0
    
    
             Layout : left-symmetric
         Chunk Size : 64K
    
    
               UUID : e7db05b0:4a9008b8:98883325:0d269d95
             Events : 0.116984
    
    
        Number   Major   Minor   RaidDevice State
           0       8      129        0      active sync   /dev/sdi1
           1       8       81        1      active sync   /dev/sdf1
           2       8       33        2      active sync   /dev/sdc1
           3       8      113        3      active sync   /dev/sdh1
           4       8       49        4      active sync   /dev/sdd1
           5       8       97        5      active sync   /dev/sdg1
           6       8       17        6      active sync   /dev/sdb1
           7       8       65        7      active sync   /dev/sde1
           8       8      161        8      active sync   /dev/sdk1
           9       8      145        9      active sync   /dev/sdj1
          10       8      177       10      active sync   /dev/sdl1
    Code:
    sudo mdadm --examine /dev/md0
    mdadm: No md superblock detected on /dev/md0.
    Code:
    sudo mount /dev/md0 /media/storagemount: wrong fs type, bad option, bad superblock on /dev/md0,
           missing codepage or helper program, or other error
           In some cases useful info is found in syslog - try
           dmesg | tail  or so
    Bah!

  5. #35
    Join Date
    Jul 2010
    Location
    Michigan, USA
    Beans
    2,081
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Raid 6 Failure During Reshape (Among Other Problems)

    The md device will never have a superblock on it (/dev/md0). The Superblocks reside on the individual disks (i.e. /dev/sd[bcd]1 etc). That's what you viewed earlier when I had you run mdadm -E on each disk. Your array is now assembled in the correct order per their metadata, but it appears that your filesystem is corrupt. Try looking for alternate filesystem superblock on your array.

    Code:
    dumpe2fs /dev/md0 | grep superblock
    Last edited by rubylaser; October 2nd, 2013 at 08:12 PM.

  6. #36
    Join Date
    Sep 2013
    Beans
    16

    Re: Raid 6 Failure During Reshape (Among Other Problems)

    Ah, yes...silly me. It's been a long week.

    Code:
    sudo dumpe2fs /dev/md0 | sudo grep superblockdumpe2fs 1.42 (29-Nov-2011)
    Journal superblock magic number invalid!

  7. #37
    Join Date
    Oct 2009
    Beans
    Hidden!
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Raid 6 Failure During Reshape (Among Other Problems)

    Not really sure what else to do with this. That looks like the same output you got before.

    I hooked up my backup server and ran dumpe2fs on it and got this:

    Code:
    root@Loki:~# dumpe2fs /dev/md0 | grep superblock
    dumpe2fs 1.42.5 (29-Jul-2012)
      Primary superblock at 0, Group descriptors at 1-233
      Backup superblock at 32768, Group descriptors at 32769-33001
      Backup superblock at 98304, Group descriptors at 98305-98537
      Backup superblock at 163840, Group descriptors at 163841-164073
      Backup superblock at 229376, Group descriptors at 229377-229609
      Backup superblock at 294912, Group descriptors at 294913-295145
      Backup superblock at 819200, Group descriptors at 819201-819433
      Backup superblock at 884736, Group descriptors at 884737-884969
      Backup superblock at 1605632, Group descriptors at 1605633-1605865
      Backup superblock at 2654208, Group descriptors at 2654209-2654441
      Backup superblock at 4096000, Group descriptors at 4096001-4096233
      Backup superblock at 7962624, Group descriptors at 7962625-7962857
      Backup superblock at 11239424, Group descriptors at 11239425-11239657
      Backup superblock at 20480000, Group descriptors at 20480001-20480233
      Backup superblock at 23887872, Group descriptors at 23887873-23888105
      Backup superblock at 71663616, Group descriptors at 71663617-71663849
      Backup superblock at 78675968, Group descriptors at 78675969-78676201
      Backup superblock at 102400000, Group descriptors at 102400001-102400233
      Backup superblock at 214990848, Group descriptors at 214990849-214991081
      Backup superblock at 512000000, Group descriptors at 512000001-512000233
      Backup superblock at 550731776, Group descriptors at 550731777-550732009
      Backup superblock at 644972544, Group descriptors at 644972545-644972777


    I kinda wonder if the only way to fix the file system is to clear the journal?
    Last edited by CharlesA; October 3rd, 2013 at 06:22 PM. Reason: added afterthought
    Come to #ubuntuforums! We have cookies! | Basic Ubuntu Security Guide

    Tomorrow's an illusion and yesterday's a dream, today is a solution...

  8. #38
    Join Date
    Jul 2010
    Location
    Michigan, USA
    Beans
    2,081
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Raid 6 Failure During Reshape (Among Other Problems)

    Quote Originally Posted by CharlesA View Post
    Not really sure what else to do with this. That looks like the same output you got before.

    I hooked up my backup server and ran dumpe2fs on it and got this:

    [code]



    I kinda wonder if the only way to fix the file system is to clear the journal?
    You can try to clear the journal, and see if that helps. Here is a thread that cover the same error message. Unfortunately, even if this works, you will likely end up with a bunch of files in your lost+found folder that need to be moved back to their correct location. Please keep us posted on your progress.
    Last edited by rubylaser; October 3rd, 2013 at 08:35 PM.

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