Lacie 5Big2 Failed After Firmware Update

[Mijzelf]

I should do mdadm --examine /dev/sd* right?

mdadm --examine /dev/sd*2
And when you're in, also a 'cat /proc/partitions' please.

[unlucky1]

Okay with disk 1 in slot 3 and slots 1 and 2 empty, we have:

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root@(none):/ # mdadm --examine /dev/sd*2
mdadm: No md superblock detected on /dev/sda2.
/dev/sdb2:
          Magic : a92b4efc
        Version : 1.0
    Feature Map : 0x0
     Array UUID : 4f4a8ea3:4c99b769:e18e6826:872bc27f
           Name : (none):4  (local to host (none))
  Creation Time : Thu Jan  1 00:00:39 1970
     Raid Level : raid5
   Raid Devices : 5

 Avail Dev Size : 1949474544 (929.58 GiB 998.13 GB)
     Array Size : 7797895168 (3718.33 GiB 3992.52 GB)
  Used Dev Size : 1949473792 (929.58 GiB 998.13 GB)
   Super Offset : 1949474800 sectors
          State : clean
    Device UUID : 9134e88d:390f3c7e:ae8566b5:7a779902

    Update Time : Tue Jun 18 10:35:58 2013
       Checksum : 71c4a891 - correct
         Events : 51808

         Layout : left-symmetric
     Chunk Size : 512K

   Device Role : Active device 4
   Array State : AAAAA ('A' == active, '.' == missing)
/dev/sdc2:
          Magic : a92b4efc
        Version : 1.0
    Feature Map : 0x0
     Array UUID : 4f4a8ea3:4c99b769:e18e6826:872bc27f
           Name : (none):4  (local to host (none))
  Creation Time : Thu Jan  1 00:00:39 1970
     Raid Level : raid5
   Raid Devices : 5

 Avail Dev Size : 1949474544 (929.58 GiB 998.13 GB)
     Array Size : 7797895168 (3718.33 GiB 3992.52 GB)
  Used Dev Size : 1949473792 (929.58 GiB 998.13 GB)
   Super Offset : 1949474800 sectors
          State : clean
    Device UUID : b7d90b31:1b4b0e9a:c3f998a6:fbe87a36

    Update Time : Tue Jun 18 10:35:58 2013
       Checksum : 55ce6f2e - correct
         Events : 51808

         Layout : left-symmetric
     Chunk Size : 512K

   Device Role : Active device 3
   Array State : AAAAA ('A' == active, '.' == missing)
mdadm: cannot open /dev/sde2: No such device or address


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root@(none):/ # cat /proc/partitions
major minor  #blocks  name

  31        0        500 mtdblock0
  31        1          4 mtdblock1
   8        0  976762584 sdc
   8        2  974737408 sdc2
   8       16  976762584 sde
   8       18  974737408 sde2
   8       32  976762584 sdd
   8       34  974737408 sdd2


[unlucky1]

What should I try next?

[Mijzelf]

Swapping the disks obviously did nothing. It's not a nas hardware or kernel problem, the disk just doesn't contain a superblock.

So build the disks back in their original configuration, check if the minors of the disks are still

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 8 0 976762584 sdc
 8 16 976762584 sdb
 8 32 976762584 sda
 8 48 976762584 sde
 8 64 976762584 sdd

then execute

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rm /dev/sd*

mknod -m 666 /dev/sdc b 8 0
mknod -m 666 /dev/sdc2 b 8 2

mknod -m 666 /dev/sdb b 8 16
mknod -m 666 /dev/sdb2 b 8 18

mknod -m 666 /dev/sda b 8 32
mknod -m 666 /dev/sda2 b 8 34

mknod -m 666 /dev/sde b 8 48
mknod -m 666 /dev/sde2 b 8 50

mknod -m 666 /dev/sdd b 8 64
mknod -m 666 /dev/sdd2 b 8 66

to bring the device nodes in par with their physical sequence, execute

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mdadm --assemble /dev/md0 --uuid=4f4a8ea3:4c99b769:e18e6826:872bc27f

and if that succeeds, execute

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cat /proc/mdstat

[unlucky1]

okay, I'm in now finally. uboot didn't work first 2 times. Now it works and I'm in. Strange.

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major minor  #blocks  name

  31        0        500 mtdblock0
  31        1          4 mtdblock1
   8        0  976762584 sdc
   8        2  974737408 sdc2
   8       16  976762584 sdb
   8       18  974737408 sdb2
   8       32  976762584 sda
   8       34  974737408 sda2
   8       48  976762584 sde
   8       50  974737408 sde2
   8       64  976762584 sdd
   8       66  974737408 sdd2


[unlucky1]

Shall I execute what you suggest now?

[unlucky1]

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root@(none):/ # mdadm --assemble /dev/md0 --uuid=4f4a8ea3:4c99b769:e18e6826:872bc27f
mdadm: /dev/md0 assembled from 3 drives - not enough to start the array.
root@(none):/ # cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md0 : inactive sdc2[2](S) sde2[4](S) sdd2[3](S)
      2924211816 blocks super 1.0
       
unused devices: <none>
root@(none):/ #


[unlucky1]

What do you think of it now? Not good, right?!

[fvdw]

the battle goes on...

below a picture to specify what I mean with slot 1 and what according the bus and disk map in the kernel is seen as sda-sde

5big2.JPG

[unlucky1]

Thanks! That helps! It was a bit confusing for me.