Help to assemble raid5 - no superblock!

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A little help again. After being able to successfully mount in the
mips machine now that i am trying to mount in a x86 machine it is not
working.

#  root@eeepc:~# mdadm -A  --update=byteorder /dev/md1 /dev/sdc2
/dev/sdd2 /dev/sde2
mdadm: failed to add /dev/sdd2 to /dev/md1: Invalid argument
mdadm: failed to add /dev/sde2 to /dev/md1: Invalid argument
mdadm: failed to add /dev/sdc2 to /dev/md1: Invalid argument
mdadm: /dev/md1 assembled from 0 drives - not enough to start the array.


root@eeepc:~#   mdadm -E  /dev/sdc2
/dev/sdc2:
         Magic : a92b4efc
       Version : 0.90.00
          UUID : 9ef886db:6d1ad183:a547ee43:0d984338
 Creation Time : Thu Mar 29 11:50:27 2012
    Raid Level : raid5
 Used Dev Size : 1360279872 (1297.26 GiB 1392.93 GB)
    Array Size : 2720559744 (2594.53 GiB 2785.85 GB)
  Raid Devices : 3
 Total Devices : 3
Preferred Minor : 1

   Update Time : Thu Apr 26 20:01:51 2012
         State : clean
 Active Devices : 3
Working Devices : 3
 Failed Devices : 0
 Spare Devices : 0
      Checksum : 5844783d - expected 5844773d
        Events : 65223

        Layout : left-symmetric
    Chunk Size : 64K

     Number   Major   Minor   RaidDevice State
this     0       8        2        0      active sync   /dev/sda2

  0     0       8        2        0      active sync   /dev/sda2
  1     1       8       18        1      active sync   /dev/sdb2
  2     2       8       34        2      active sync   /dev/sdc2

root@eeepc:~#   mdadm -E  /dev/sdd2
/dev/sdd2:
         Magic : a92b4efc
       Version : 0.90.00
          UUID : 9ef886db:6d1ad183:a547ee43:0d984338
 Creation Time : Thu Mar 29 11:50:27 2012
    Raid Level : raid5
 Used Dev Size : 1360279872 (1297.26 GiB 1392.93 GB)
    Array Size : 2720559744 (2594.53 GiB 2785.85 GB)
  Raid Devices : 3
 Total Devices : 3
Preferred Minor : 1

   Update Time : Thu Apr 26 20:01:51 2012
         State : clean
 Active Devices : 3
Working Devices : 3
 Failed Devices : 0
 Spare Devices : 0
      Checksum : 5844784f - expected 5844774f
        Events : 65223

        Layout : left-symmetric
    Chunk Size : 64K

     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       34        2      active sync   /dev/sdc2
root@eeepc:~#   mdadm -E  /dev/sde2
/dev/sde2:
         Magic : a92b4efc
       Version : 0.90.00
          UUID : 9ef886db:6d1ad183:a547ee43:0d984338
 Creation Time : Thu Mar 29 11:50:27 2012
    Raid Level : raid5
 Used Dev Size : 1360279872 (1297.26 GiB 1392.93 GB)
    Array Size : 2720559744 (2594.53 GiB 2785.85 GB)
  Raid Devices : 3
 Total Devices : 3
Preferred Minor : 1

   Update Time : Thu Apr 26 20:01:51 2012
         State : clean
 Active Devices : 3
Working Devices : 3
 Failed Devices : 0
 Spare Devices : 0
      Checksum : 58447861 - expected 58447761
        Events : 65223
        Layout : left-symmetric
    Chunk Size : 64K

     Number   Major   Minor   RaidDevice State
this     2       8       34        2      active sync   /dev/sdc2

  0     0       8        2        0      active sync   /dev/sda2
  1     1       8       18        1      active sync   /dev/sdb2
  2     2       8       34        2      active sync   /dev/sdc2


Apparently i am getting checksum error.


root@eeepc:~# dmesg

...
[ 2102.169124] md: invalid superblock checksum on sde2
[ 2102.169133] md: sde2 does not have a valid v0.90 superblock, not importing!
[ 2102.169152] md: md_import_device returned -22
[ 2102.170490] md: invalid superblock checksum on sdc2
[ 2102.170499] md: sdc2 does not have a valid v0.90 superblock, not importing!
[ 2102.170513] md: md_import_device returned -22
[ 2133.642956] scsi_verify_blk_ioctl: 24 callbacks suppressed
[ 2133.642964] mdadm: sending ioctl 800c0910 to a partition!
[ 2133.642971] mdadm: sending ioctl 800c0910 to a partition!
[ 2133.642988] mdadm: sending ioctl 1261 to a partition!
[ 2133.642993] mdadm: sending ioctl 1261 to a partition!
[ 2133.643682] mdadm: sending ioctl 1261 to a partition!
[ 2133.643689] mdadm: sending ioctl 1261 to a partition!
[ 2133.648251] mdadm: sending ioctl 1261 to a partition!
[ 2133.648258] mdadm: sending ioctl 1261 to a partition!
[ 2133.648732] mdadm: sending ioctl 1261 to a partition!
[ 2133.648738] mdadm: sending ioctl 1261 to a partition!
[ 2260.925012] scsi_verify_blk_ioctl: 8 callbacks suppressed
...

root@eeepc:~# mdadm --version
mdadm - v3.2.3 - 23rd December 2011


any ideas how to fix this ?





[]'s
Salatiel


On Wed, Apr 4, 2012 at 08:47, NeilBrown <neilb@xxxxxxx> wrote:
> On Wed, 4 Apr 2012 08:15:57 -0300 Salatiel Filho <salatiel.filho@xxxxxxxxx>
> wrote:
>
>> I am having a big problem trying to assemble my raid.
>> I can assemble just fine in the old machine (LINUX ARM) where i built
>> the raid in the first place, but i am just unable to do in other
>> machine (Linux mips). I have no mdadm.conf in both machines.
>> I got the following error:
>>
>> # mdadm  -A /dev/md0 /dev/sda2 /dev/sdb2 /dev/sdc2
>> mdadm: no recogniseable superblock on /dev/sda2
>> mdadm: /dev/sda2 has no superblock - assembly aborted
>>
>> # cat /var/log/messages | tail
>>
>> Apr  4 08:08:32 (none) kernel: [ 8577.010000] scsi_verify_blk_ioctl: 4
>> callbacks suppressed
>> Apr  4 08:08:32 (none) kernel: [ 8577.020000] mdadm: sending ioctl
>> 400c0910 to a partition!
>> Apr  4 08:08:32 (none) kernel: [ 8577.020000] mdadm: sending ioctl
>> 400c0910 to a partition!
>> Apr  4 08:08:32 (none) kernel: [ 8577.030000] mdadm: sending ioctl
>> 20001261 to a partition!
>> Apr  4 08:08:32 (none) kernel: [ 8577.040000] mdadm: sending ioctl
>> 20001261 to a partition!
>> Apr  4 08:08:32 (none) kernel: [ 8577.050000] mdadm: sending ioctl
>> 20001261 to a partition!
>> Apr  4 08:08:32 (none) kernel: [ 8577.050000] mdadm: sending ioctl
>> 20001261 to a partition!
>> Apr  4 08:08:32 (none) kernel: [ 8577.270000] mdadm: sending ioctl
>> 20001261 to a partition!
>> Apr  4 08:08:32 (none) kernel: [ 8577.280000] mdadm: sending ioctl
>> 20001261 to a partition!
>> Apr  4 08:08:33 (none) kernel: [ 8577.290000] mdadm: sending ioctl
>> 20001261 to a partition!
>> Apr  4 08:08:33 (none) kernel: [ 8577.290000] mdadm: sending ioctl
>> 20001261 to a partition!
>>
>> # fdisk -l  /dev/sda
>>
>> Disk /dev/sda: 1500.3 GB, 1500301910016 bytes
>> 255 heads, 63 sectors/track, 182401 cylinders
>> Units = cylinders of 16065 * 512 = 8225280 bytes
>>
>>    Device Boot      Start         End      Blocks  Id System
>> /dev/sda1               1       13055   104857600  83 Linux
>> /dev/sda2           13055      182402  1360279960  fd Linux raid autodetect
>>
>>
>> # fdisk -l  /dev/sdb
>>
>> Disk /dev/sdb: 1500.3 GB, 1500301910016 bytes
>> 255 heads, 63 sectors/track, 182401 cylinders
>> Units = cylinders of 16065 * 512 = 8225280 bytes
>>
>>    Device Boot      Start         End      Blocks  Id System
>> /dev/sdb1               1       13055   104857600  83 Linux
>> Partition 1 does not end on cylinder boundary
>> /dev/sdb2           13055      182402  1360279960  fd Linux raid autodetect
>> Partition 2 does not end on cylinder boundary
>>
>> # fdisk -l /dev/sdc
>>
>> Disk /dev/sdc: 1500.3 GB, 1500301910016 bytes
>> 255 heads, 63 sectors/track, 182401 cylinders
>> Units = cylinders of 16065 * 512 = 8225280 bytes
>>
>>    Device Boot      Start         End      Blocks  Id System
>> /dev/sdc1               1       13055   104857600  83 Linux
>> /dev/sdc2           13055      182402  1360279960  fd Linux raid autodetect
>>
>>
>> # cat /proc/mdstat
>> Personalities : [raid1] [raid6] [raid5] [raid4]
>> unused devices: <none>
>>
>>
>>
>> # lsmod | grep -i 'md\|raid'
>> raid456                47584  0
>> async_raid6_recov        896  1 raid456
>> async_pq                1536  1 raid456
>> raid6_pq               74752  2 async_raid6_recov,async_pq
>> async_xor                976  2 raid456,async_pq
>> async_memcpy             560  1 raid456
>> async_tx                 832  5
>> raid456,async_raid6_recov,async_pq,async_xor,async_memcpy
>> raid1                  24304  0
>> md_mod                 88816  2 raid456,raid1
>> md5                     1424  0
>> crypto_hash             7888  3 dm_crypt,sha1_generic,md5
>>
>>
>>
>> # uname -a
>>
>> Linux router 3.2.9 #16 Sun Mar 25 16:31:49 BRT 2012 mips GNU/Linux
>>
>>
>> Any help ?
>
> ARM is little-endian
> MIPS ?? is that bigendian?
>
> What does
>   mdadm -E --metadata=0.swap /dev/sda2
> report?
>
>
> If it is something useful, then try adding
>   --update=byteorder
> to the "mdadm -A" command.
>
> NeilBrown
>
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