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Ultra 6 - Dead drive, Replaced but won't Rebuild #24999085
I have a ReadyNAS Ultra 6 in Raid 6 which was 98% full. RAIDiator 4.2.25 Wed Jan 7 12:56:48 NZDT 2015 Disk failure detected. Wed Jan 7 12:57:01 NZDT 2015 ..... If this disk is a part of a RAI...
Email with details of what my friend Cg did
Bit of a spam below, but these are the steps i took to fix it. MIght help someone on the forums.
Parts with ### are my comments to explain what I did, the rest are console copy/pastes
Enjoy ;-)
cg
### GPT Partition table missing for new disk /dev/sdd;
Disk /dev/sdd: 4294967295 sectors, 2047G
Logical sector size: 512
Disk identifier (GUID): 470beb69-b974-4199-a9e0-0027bdd134a7
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 5860533134
Number  Start (sector)   End (sector)  Size    Code  Name
QuinnyNAS:~#
### Clone the partition table from another OK drive, ie. /dev/sdf;
### sgdisk -R /dev/TARGET /dev/SOURCE;
### sgdisk -G /dev/sdd   to re GUID it
QuinnyNAS:~# sgdisk -R /dev/sdd /dev/sdf
The operation has completed successfully.
QuinnyNAS:~# sgdisk -p /dev/sdd
Disk /dev/sdd: 5860533168 sectors, 2.7 TiB
Logical sector size: 512 bytes
Disk identifier (GUID): 3CCDEB15-2940-4482-9BD1-B84603AA8910
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 5860533134
Partitions will be aligned on 64-sector boundaries
Total free space is 4092 sectors (2.0 MiB)
QuinnyNAS:~# sgdisk -G /dev/sdd
The operation has completed successfully.
QuinnyNAS:~# sgdisk -p /dev/sdd
Disk /dev/sdd: 5860533168 sectors, 2.7 TiB
Logical sector size: 512 bytes
Disk identifier (GUID): E3936097-C73B-400B-A176-4C00C24D0927
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 5860533134
Partitions will be aligned on 64-sector boundaries
Total free space is 4092 sectors (2.0 MiB)
Number  Start (sector)   End (sector)  Size    Code  Name
  1        64     8388671  4.0 GiB   FD00
  2     8388672     9437247  512.0 MiB  FD00
  3     9437248    5860529072  2.7 TiB   FD00
### Confirm clone is matching other drive;
QuinnyNAS:~# sgdisk -p /dev/sdf
Disk /dev/sdf: 5860533168 sectors, 2.7 TiB
Logical sector size: 512 bytes
Disk identifier (GUID): 3CCDEB15-2940-4482-9BD1-B84603AA8910
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 5860533134
Partitions will be aligned on 64-sector boundaries
Total free space is 4092 sectors (2.0 MiB)
Number  Start (sector)   End (sector)  Size    Code  Name
  1        64     8388671  4.0 GiB   FD00
  2     8388672     9437247  512.0 MiB  FD00
  3     9437248    5860529072  2.7 TiB   FD00
### Looks good - verify block devices are present now (sdd1,sdd2 previously missing);
QuinnyNAS:~# ls -l /dev/sdd*
brw-rw---- 1 root disk 8, 48 2015-04-17 20:21 /dev/sdd
brw-rw---- 1 root disk 8, 49 2015-04-17 20:21 /dev/sdd1
brw-rw---- 1 root disk 8, 58 2015-04-15 20:05 /dev/sdd10
brw-rw---- 1 root disk 8, 59 2015-04-15 20:05 /dev/sdd11
brw-rw---- 1 root disk 8, 60 2015-04-15 20:05 /dev/sdd12
brw-rw---- 1 root disk 8, 61 2015-04-15 20:05 /dev/sdd13
brw-rw---- 1 root disk 8, 62 2015-04-15 20:05 /dev/sdd14
brw-rw---- 1 root disk 8, 63 2015-04-15 20:05 /dev/sdd15
brw-rw---- 1 root disk 8, 50 2015-04-17 20:21 /dev/sdd2
brw-rw---- 1 root disk 8, 51 2015-04-15 20:05 /dev/sdd3
brw-rw---- 1 root disk 8, 52 2015-04-15 20:05 /dev/sdd4
brw-rw---- 1 root disk 8, 53 2015-04-15 20:05 /dev/sdd5
brw-rw---- 1 root disk 8, 54 2015-04-15 20:05 /dev/sdd6
brw-rw---- 1 root disk 8, 55 2015-04-15 20:05 /dev/sdd7
brw-rw---- 1 root disk 8, 56 2015-04-15 20:05 /dev/sdd8
brw-rw---- 1 root disk 8, 57 2015-04-15 20:05 /dev/sdd9
### Check mdadm metadevices - /dev/md1 and /dev/md2 were missing a drive;
QuinnyNAS:~# mdadm -D /dev/md1
/dev/md1:
    Version : 1.2
 Creation Time : Wed May 23 08:19:46 2012
   Raid Level : raid6
   Array Size : 2096896 (2048.09 MiB 2147.22 MB)
 Used Dev Size : 524224 (512.02 MiB 536.81 MB)
  Raid Devices : 6
 Total Devices : 5
  Persistence : Superblock is persistent
  Update Time : Fri Apr 17 20:06:54 2015
     State : clean, degraded
 Active Devices : 5
Working Devices : 5
 Failed Devices : 0
 Spare Devices : 0
     Layout : left-symmetric
   Chunk Size : 64K
      Name : 001F33EAD668:1
      UUID : 9ead4bd0:3fb129ca:61b328c4:17239b42
     Events : 6607
  Number  Major  Minor  RaidDevice State
    0    8     2     0    active sync  /dev/sda2
    1    8    18     1    active sync  /dev/sdb2
    2    8    34     2    active sync  /dev/sdc2
    3    0     0     3    removed
    4    8    66     4    active sync  /dev/sde2
    5    8    82     5    active sync  /dev/sdf2
### Add in new /dev/sdd2 into /dev/md1;
QuinnyNAS:~# mdadm --manage /dev/md1 --add /dev/sdd2
mdadm: added /dev/sdd2
### Check resync process;
QuinnyNAS:~# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md2 : active raid6 sda3[0] sdf3[5] sde3[4] sdc3[2] sdb3[1]
   11702178816 blocks super 1.2 level 6, 64k chunk, algorithm 2 [6/5] [UUU_UU]
md1 : active raid6 sdd2[6] sda2[0] sdf2[5] sde2[4] sdc2[2] sdb2[1]
   2096896 blocks super 1.2 level 6, 64k chunk, algorithm 2 [6/5] [UUU_UU]
   [====>................]  recovery = 21.0% (110592/524224) finish=0.1min speed=36864K/sec
md0 : active raid1 sda1[0] sdf1[5] sde1[4] sdc1[2] sdb1[1]
   4193268 blocks super 1.2 [5/5] [UUUUU]
unused devices: <none>
### Once mdstat is 100% above, check sync and State = Clean;
QuinnyNAS:~# mdadm -D /dev/md1
/dev/md1:
    Version : 1.2
 Creation Time : Wed May 23 08:19:46 2012
   Raid Level : raid6
   Array Size : 2096896 (2048.09 MiB 2147.22 MB)
 Used Dev Size : 524224 (512.02 MiB 536.81 MB)
  Raid Devices : 6
 Total Devices : 6
  Persistence : Superblock is persistent
  Update Time : Fri Apr 17 20:22:05 2015
     State : clean
 Active Devices : 6
Working Devices : 6
 Failed Devices : 0
 Spare Devices : 0
     Layout : left-symmetric
   Chunk Size : 64K
      Name : 001F33EAD668:1
      UUID : 9ead4bd0:3fb129ca:61b328c4:17239b42
     Events : 6628
  Number  Major  Minor  RaidDevice State
    0    8     2     0    active sync  /dev/sda2
    1    8    18     1    active sync  /dev/sdb2
    2    8    34     2    active sync  /dev/sdc2
    6    8    50     3    active sync  /dev/sdd2
    4    8    66     4    active sync  /dev/sde2
    5    8    82     5    active sync  /dev/sdf2
### Check /dev/md2, missing drive too;
QuinnyNAS:~# mdadm -D /dev/md2
/dev/md2:
    Version : 1.2
 Creation Time : Wed May 23 08:19:46 2012
   Raid Level : raid6
   Array Size : 11702178816 (11160.07 GiB 11983.03 GB)
 Used Dev Size : 2925544704 (2790.02 GiB 2995.76 GB)
  Raid Devices : 6
 Total Devices : 5
  Persistence : Superblock is persistent
  Update Time : Fri Apr 17 20:22:53 2015
     State : clean, degraded
 Active Devices : 5
Working Devices : 5
 Failed Devices : 0
 Spare Devices : 0
     Layout : left-symmetric
   Chunk Size : 64K
      Name : 001F33EAD668:2
      UUID : a51aa3c9:16e9bdd2:d928eae3:5d025c06
     Events : 317712
  Number  Major  Minor  RaidDevice State
    0    8     3     0    active sync  /dev/sda3
    1    8    19     1    active sync  /dev/sdb3
    2    8    35     2    active sync  /dev/sdc3
    3    0     0     3    removed
    4    8    67     4    active sync  /dev/sde3
    5    8    83     5    active sync  /dev/sdf3
### Add /dev/sdd3 to /dev/md2;
QuinnyNAS:~# mdadm --manage /dev/md2 --add /dev/sdd3
mdadm: added /dev/sdd3
### Again, check mdstat;
QuinnyNAS:~# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md2 : active raid6 sdd3[6] sda3[0] sdf3[5] sde3[4] sdc3[2] sdb3[1]
   11702178816 blocks super 1.2 level 6, 64k chunk, algorithm 2 [6/5] [UUU_UU]
   [>....................]  recovery =  0.0% (105728/2925544704) finish=8760.6min speed=5564K/sec
### Yay syncing!;
QuinnyNAS:~# mdadm -D /dev/md2
/dev/md2:
    Version : 1.2
 Creation Time : Wed May 23 08:19:46 2012
   Raid Level : raid6
   Array Size : 11702178816 (11160.07 GiB 11983.03 GB)
 Used Dev Size : 2925544704 (2790.02 GiB 2995.76 GB)
  Raid Devices : 6
 Total Devices : 6
  Persistence : Superblock is persistent
  Update Time : Fri Apr 17 20:31:24 2015
     State : clean, degraded, recovering
 Active Devices : 5
Working Devices : 6
 Failed Devices : 0
 Spare Devices : 1
     Layout : left-symmetric
   Chunk Size : 64K
 Rebuild Status : 0% complete
      Name : 001F33EAD668:2
      UUID : a51aa3c9:16e9bdd2:d928eae3:5d025c06
     Events : 317800
  Number  Major  Minor  RaidDevice State
    0    8     3     0    active sync  /dev/sda3
    1    8    19     1    active sync  /dev/sdb3
    2    8    35     2    active sync  /dev/sdc3
    6    8    51     3    spare rebuilding  /dev/sdd3
    4    8    67     4    active sync  /dev/sde3
    5    8    83     5    active sync  /dev/sdf3
### Wait for resync to finish. You CAN turn the NAS off/on, but ideally you're best to leave it going.
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