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Forum Discussion

Guide

Oct 29, 2021

ReadyNAS 426 stuck on booting..

HI, after axpanding a disk the rebuild was hanging on 0,28%. Now my readynas wont boot in normal mode. If i boot in read only the log says that the firmware was upgraded. I cannot remind giving the...

Guide

Oct 29, 2021

Radair:

Successfully completed diagnostics

System

Disk 2 has 52 Reallocated Sectors
Disk 2 has 32 Reallocation Events
Disk 2 has 3 Current Pending Sectors
Volume data is inactive
Volume data-0 is inactive

Logs

2021-10-29 20:10:35: md/raid:md127: raid level 5 active with 2 out of 3 devices, algorithm 2
2021-10-29 20:03:14: md/raid:md127: raid level 5 active with 2 out of 3 devices, algorithm 2
2021-10-29 19:59:03: md/raid:md126: raid level 5 active with 2 out of 3 devices, algorithm 2
2021-10-29 19:54:27: md/raid:md126: raid level 5 active with 2 out of 3 devices, algorithm 2
2021-10-29 19:46:44: md/raid:md127: raid level 5 active with 2 out of 3 devices, algorithm 2
2021-10-29 19:37:18: md/raid:md126: raid level 5 active with 2 out of 3 devices, algorithm 2
2021-10-29 19:27:00: md/raid:md127: raid level 5 active with 2 out of 3 devices, algorithm 2
2021-10-29 19:12:53: md/raid:md126: raid level 5 active with 2 out of 3 devices, algorithm 2
2021-10-29 19:09:24: md/raid:md127: raid level 5 active with 2 out of 3 devices, algorithm 2
2021-10-29 19:05:14: md/raid:md126: raid level 5 active with 2 out of 3 devices, algorithm 2

StephenB
Guru - Experienced User
Oct 29, 2021
Not sure what happened with the firmware update, but the log does suggest that the resync had finished before the reboot/firmware install.

Do you have 3 disks in the NAS?

Are you able to access the data in read-only mode? If so, I suggest backing it up (if you don't have an up-to-date backup already).

The errors on disk 2 are concerning. It would be useful to download the log zip file (which RAIDar should be able to do), and then copy/paste the contents of mdstat.log.
- Supercows
  Guide
  Oct 29, 2021
  Thanks for your reply!
  I have 3 disks in the readynas. I added 1 today.
  
  Mdstat.log:
  Personalities : [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
  md1 : active raid1 sdc2[2] sdb2[1] sda2[0]
  523264 blocks super 1.2 [3/3] [UUU]
  
  md126 : active (read-only) raid1 sda4[0] sdc4[1]
  976619904 blocks super 1.2 [2/2] [UU]
  resync=PENDING
  
  md127 : active (read-only) raid5 sda3[3] sdb3[2]
  2925416800 blocks super 1.2 level 5, 32k chunk, algorithm 2 [3/2] [UU_]
  
  md0 : active raid1 sdc1[4] sda1[3] sdb1[2]
  4190208 blocks super 1.2 [3/3] [UUU]
  
  unused devices: <none>
  /dev/md/0:
  Version : 1.2
  Creation Time : Wed Mar 16 08:41:11 2016
  Raid Level : raid1
  Array Size : 4190208 (4.00 GiB 4.29 GB)
  Used Dev Size : 4190208 (4.00 GiB 4.29 GB)
  Raid Devices : 3
  Total Devices : 3
  Persistence : Superblock is persistent
  Update Time : Fri Oct 29 21:23:29 2021
  State : clean
  Active Devices : 3
  Working Devices : 3
  Failed Devices : 0
  Spare Devices : 0
  Consistency Policy : unknown
  Name : 0a4510d0:0 (local to host 0a4510d0)
  UUID : 4858ca72:1e8ebe2a:dcbdda0a:4c08b023
  Events : 1139
  Number Major Minor RaidDevice State
  3 8 1 0 active sync /dev/sda1
  2 8 17 1 active sync /dev/sdb1
  4 8 33 2 active sync /dev/sdc1
  /dev/md/data-0:
  Version : 1.2
  Creation Time : Wed Mar 16 08:41:11 2016
  Raid Level : raid5
  Array Size : 2925416800 (2789.89 GiB 2995.63 GB)
  Used Dev Size : 2925416800 (2789.89 GiB 2995.63 GB)
  Raid Devices : 3
  Total Devices : 2
  Persistence : Superblock is persistent
  Update Time : Fri Oct 29 20:03:16 2021
  State : clean, degraded
  Active Devices : 2
  Working Devices : 2
  Failed Devices : 0
  Spare Devices : 0
  Layout : left-symmetric
  Chunk Size : 32K
  Consistency Policy : unknown
  Delta Devices : 1, (2->3)
  Name : 0a4510d0:data-0 (local to host 0a4510d0)
  UUID : 35e58e71:f4df1a57:38243e16:1e8a5376
  Events : 122055
  Number Major Minor RaidDevice State
  3 8 3 0 active sync /dev/sda3
  2 8 19 1 active sync /dev/sdb3
  - 0 0 2 removed
  /dev/md/data-1:
  Version : 1.2
  Creation Time : Fri Oct 29 16:59:31 2021
  Raid Level : raid1
  Array Size : 976619904 (931.38 GiB 1000.06 GB)
  Used Dev Size : 976619904 (931.38 GiB 1000.06 GB)
  Raid Devices : 2
  Total Devices : 2
  Persistence : Superblock is persistent
  Update Time : Fri Oct 29 16:59:32 2021
  State : clean, resyncing (PENDING)
  Active Devices : 2
  Working Devices : 2
  Failed Devices : 0
  Spare Devices : 0
  Consistency Policy : unknown
  Name : 0a4510d0:data-1 (local to host 0a4510d0)
  UUID : 135af482:d759e7bd:2ad1f59b:8ea3bb81
  Events : 1
  Number Major Minor RaidDevice State
  0 8 4 0 active sync /dev/sda4
  1 8 36 1 active sync /dev/sdc4
  
  unfortunately I cannot access data in readonly mode. Can I do something on ssh to make that possible?
  Is there something I can do to fix this?
  - StephenB
    Guru - Experienced User
    Oct 29, 2021
    The resync pending isn't something I've seen before.
    
    It is possible to set the volume to read/write with mdadm
    
    mdadm --readwrite /dev/md127
    
    But I really don't know what will happen if you try that. It could make things worse.
    
    What sizes are the disks? What disk did you add? Was it smaller than the others?

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