Lacie 5Big2 Failed After Firmware Update

[unlucky1]

Yes, weird:

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root@(none):/ # mknod -m 666 /dev/sdd2 b 8 50
root@(none):/ # dd-64 if=/dev/sdd2 bs=1M count=64 | gzip >/mountpoint/sdd2_start.gz
64+0 records in
64+0 records out
67108864 bytes (67 MB) copied, -2.18137e-57 s, -0.0 MB/s
root@(none):/ # dd-64 if=/dev/sdd2 of=/mountpoint/sdd2_end.gz bs=1M skip=951820
72+0 records in
72+0 records out
75497472 bytes (75 MB) copied, -1.44723e+269 s, -0.0 MB/s


[Mijzelf]

As long as it does it's main job...

[unlucky1]

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[code]root@(none):/mountpoint # ls -al
total 424352
drwxr-xr-x    3 root     root          4096 Jul 10 19:06 .
drwxr-xr-x   13 root     root             0 Jul 10 13:33 ..
-rw-r--r--    1 root     root           764 Jul 10 17:53 environment
drwx------    2 root     root         16384 Jul  9 20:24 lost+found
-rw-r--r--    1 root     root      75497472 Jul 10 17:17 sda2_end.gz
-rw-r--r--    1 root     root      11990312 Jul 10 13:46 sda2_start.gz
-rw-r--r--    1 root     root      75497472 Jul 10 17:40 sdb2_end.gz
-rw-r--r--    1 root     root      10363543 Jul 10 17:20 sdb2_start.gz
-rw-r--r--    1 root     root      75497472 Jul 10 17:49 sdc2_end.gz
-rw-r--r--    1 root     root      10884716 Jul 10 17:41 sdc2_start.gz
-rw-r--r--    1 root     root      75497472 Jul 10 19:06 sdd2_end.gz
-rw-r--r--    1 root     root      11864191 Jul 10 19:06 sdd2_start.gz
-rw-r--r--    1 root     root      75497472 Jul 10 17:51 sde2_end.gz
-rw-r--r--    1 root     root      11435246 Jul 10 17:50 sde2_start.gz
-rw-r--r--    1 root     root            20 Jul 10 17:51 sdf2_start.gz[/code]

[fvdw]

You can repeat that for the other 4 partitions, where you of course also change the names of the output files.
Then also do
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cat /proc/partitions >>/mountpoint/environment
ls -l /dev/sd*2 >>/mountpoint/environment
mdadm --examine /dev/sd[abcde]2 >>/mountpoint/environment

did you also do these 3 commands Mijzelf proposed ?

[unlucky1]

Still need to copy over mdadm and do it and then it'll be done!

[unlucky1]

I did it all and got

mdadm: No md superblock detected on /dev/sdb2.
mdadm: No md superblock detected on /dev/sdc2.

[unlucky1]

How does this look?

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root@(none):/mountpoint # cat environment
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
   8       80 2930266580 sef
   8       81 2930253824 sef1
brw-rw----    1 root     root        8,   2 Jun  1 18:17 /dev/sda2
brw-r--r--    1 root     root        8,  18 Jun  1 18:17 /dev/sdb2
brw-rw----    1 root     root        8,  34 Jun  1 18:17 /dev/sdc2
brw-rw----    1 root     root        8,  66 Jun  1 18:17 /dev/sde2
/dev/sda2:
          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 : 4cd37662:2ba33322:fa552e2d:896e2c95

    Update Time : Tue Jun 18 10:35:58 2013
       Checksum : f4a5a296 - correct
         Events : 51808

         Layout : left-symmetric
     Chunk Size : 512K

   Device Role : Active device 2
   Array State : AAAAA ('A' == active, '.' == missing)
/dev/sdd2:
          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/sde2:
          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)

[Mijzelf]

I did it all and got

mdadm: No md superblock detected on /dev/sdb2.
mdadm: No md superblock detected on /dev/sdc2.

The output is redirected to the file /mountpoint/environment, except these ones, because this are error messages.

The command to create a new array is:

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mdadm --create --assume-clean --metadata=1.0 --layout=left-symmetric --chunk=512K --level=raid5 --raid-devices=5 /dev/md0 /dev/sd[abcde]2

As far as I see this will create an array with the same characteristics as the current one. (chunksize, layout, ...)

Because the role of the partition in the array is imposed by the sequence [abcde] it's important that the device nodes are in the same order as the physical disks. So check if the minors of

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ls -l /dev/sd*2

match the ones in

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cat /proc/partitions

before going on.

[unlucky1]

I kinda can't tell - it looks not in order....

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root@(none):/mountpoint # ls -l /dev/sd*2
brw-rw----    1 root     root        8,   2 Jun  1 18:17 /dev/sda2
brw-r--r--    1 root     root        8,  18 Jun  1 18:17 /dev/sdb2
brw-rw----    1 root     root        8,  34 Jun  1 18:17 /dev/sdc2
brw-rw-rw-    1 root     root        8,  50 Jul 10 19:05 /dev/sdd2
brw-rw----    1 root     root        8,  66 Jun  1 18:17 /dev/sde2

root@(none):/mountpoint # 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 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
   8       80 2930266580 sef
   8       81 2930253824 sef1

[unlucky1]

And should I unplug the USB first?