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Solved
Issue adding drive 4 to ReadyNAS nv+ v2
All I recently setup my ReadyNAS NV+ v2 from scratch with 3 3 TB Hitachi DK7SAD300 drives. The steps I followed and an issue I encountered are described in Best way to swap drives ReadyNAS nv+ ...
Good news, I've just completed the factory reset.
What was awkward was that the setup from RAIDar took quite some time; at some point it had to perform a repair synchronising volume c across to disk 4. But after it completed 14 hrs later, I now see a net capacity of 8.1 TB.
Very pleased to see this, I immediately installed the ssh add-on to confirm the RAID volumes are all in good shape. And they are!
No idea why this was so difficult, but very pleased that it's now all working!
root@vanrun:~# mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Fri Feb 27 21:38:08 2026
Raid Level : raid1
Array Size : 4193268 (4.00 GiB 4.29 GB)
Used Dev Size : 4193268 (4.00 GiB 4.29 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Sat Feb 28 15:07:38 2026
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Name : 2CB05DBE90E2:0
UUID : 62d0bf22:792a8fc7:22dd1b9f:70d34a1d
Events : 18701
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 8 17 1 active sync /dev/sdb1
2 8 33 2 active sync /dev/sdc1
3 8 49 3 active sync /dev/sdd1
root@vanrun:~# mdadm --detail /dev/md1
/dev/md1:
Version : 1.2
Creation Time : Fri Feb 27 21:38:09 2026
Raid Level : raid6
Array Size : 1048448 (1024.05 MiB 1073.61 MB)
Used Dev Size : 524224 (512.02 MiB 536.81 MB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Sat Feb 28 15:03:34 2026
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Name : 2CB05DBE90E2:1
UUID : 843210da:82866fb2:20fe9997:a60abdf5
Events : 111
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 8 50 3 active sync /dev/sdd2
root@vanrun:~# mdadm --detail /dev/md2
/dev/md2:
Version : 1.2
Creation Time : Fri Feb 27 21:38:09 2026
Raid Level : raid5
Array Size : 8776634112 (8370.05 GiB 8987.27 GB)
Used Dev Size : 2925544704 (2790.02 GiB 2995.76 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Sat Feb 28 15:07:59 2026
State : active
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Name : 2CB05DBE90E2:2
UUID : 2eb52944:e890074d:fc59156f:99b14a04
Events : 905
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 8 51 3 active sync /dev/sdd3
Good news, I've just completed the factory reset.
What was awkward was that the setup from RAIDar took quite some time; at some point it had to perform a repair synchronising volume c across to disk 4. But after it completed 14 hrs later, I now see a net capacity of 8.1 TB.
Very pleased to see this, I immediately installed the ssh add-on to confirm the RAID volumes are all in good shape. And they are!
No idea why this was so difficult, but very pleased that it's now all working!
root@vanrun:~# mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Fri Feb 27 21:38:08 2026
Raid Level : raid1
Array Size : 4193268 (4.00 GiB 4.29 GB)
Used Dev Size : 4193268 (4.00 GiB 4.29 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Sat Feb 28 15:07:38 2026
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Name : 2CB05DBE90E2:0
UUID : 62d0bf22:792a8fc7:22dd1b9f:70d34a1d
Events : 18701
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 8 17 1 active sync /dev/sdb1
2 8 33 2 active sync /dev/sdc1
3 8 49 3 active sync /dev/sdd1
root@vanrun:~# mdadm --detail /dev/md1
/dev/md1:
Version : 1.2
Creation Time : Fri Feb 27 21:38:09 2026
Raid Level : raid6
Array Size : 1048448 (1024.05 MiB 1073.61 MB)
Used Dev Size : 524224 (512.02 MiB 536.81 MB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Sat Feb 28 15:03:34 2026
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Name : 2CB05DBE90E2:1
UUID : 843210da:82866fb2:20fe9997:a60abdf5
Events : 111
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 8 50 3 active sync /dev/sdd2
root@vanrun:~# mdadm --detail /dev/md2
/dev/md2:
Version : 1.2
Creation Time : Fri Feb 27 21:38:09 2026
Raid Level : raid5
Array Size : 8776634112 (8370.05 GiB 8987.27 GB)
Used Dev Size : 2925544704 (2790.02 GiB 2995.76 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Sat Feb 28 15:07:59 2026
State : active
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Name : 2CB05DBE90E2:2
UUID : 2eb52944:e890074d:fc59156f:99b14a04
Events : 905
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 8 51 3 active sync /dev/sdd3
No idea why this was so difficult, but very pleased that it's now all working!Great, thx for posting the update.
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