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RN104: ghost “NG-8TB-Seagate” volume (RAID unknown) Inactive/Unprotected
I have a ReadyNAS RN104 that’s working fine from the data point of view, but the volume configuration seems corrupted and is generating constant volume health alerts that I cannot clear. I’m hopi...
OS6's JBOD volumes are actually MDADM single-drive RAID1 volumes where the OS simply does not tell you that the RAID is "degraded" (not redundant). It appears that something is amiss with that process on your NAS. There are some SSH commands that may resolve that, but getting the information StephenB has requested is needed to determine if those are the right ones in your case. The content of mdstat.log will be especially telling.
In addition, did you have the "phantom" 3TB volume before you swapped out the other 3TB for the current 8TB? Do you know which was your "primary" drive (normally, the oldest) before you did the swap?
Thanks, just creating the log zip now.
The "Phantom" 3TB drive I'm guessing is actually my old 3TB Western Digital drive that started to fail, so I replaced that with my new 8TB Seagate and copied all the old files over to that (apart from a handful I lost die to the impending failure).
When I was setting up the new 8TB I think I did something wrong as I thought I had created a new volume, then couldn't see it so repeated the process. Not sure what I did, but that may have something to do with it?
I'm not sure what my "primary" drive would be, how could I see that info please?I'm not sure what my "primary" drive would be, how could I see that info please?
First, what it is...
The "primary" RAID group (drive since you use jbod) is the one that hosts your apps and home folders.
In your case, mounts.log shows
/dev/md124 on /home type btrfs (rw,noatime,nodiratime,nospace_cache,subvolid=2962,subvol=/home)
/dev/md124 on /apps type btrfs (rw,noatime,nodiratime,nospace_cache,subvolid=2961,subvol=/.apps)
mdstat.log shows md124 is sdd3 (partition 3 on drive sdd)
md124 : active raid1 sdd3[0]
7809175808 blocks super 1.2 [1/1] [U]
And disk_info.log tells us that this is your newly added 8 TB drive.
Device: sdd
Controller: 0
Channel: 0
Model: ST8000DM004-2U9188
Serial: WSC3064D
One consequence here is that any home folders and apps would have been lost when you replaced this drive.
Note this is an SMR drive, which isn't well suited for RAID. Fortunately you are using JBOD. Still you likely will find that you will get poor performance with sustained writes.
An Ironwolf would have been a better choice.
More later.
Thanks. I only actually use this NAS unit once a week to do a backup run so it normally doesn't get much use so I figured that an SMR drive although not ideal, would be adequate for my needs. (I normally only ever use WD Red drives, but these are really scarce currently and when you can find them, they are stpidly expensive).
Saying that though, I do need this nas unit/drives to work properly, and I don't actually think I'm any closer to resolving the problem.
Any other ideas?
This is what the mdstat.log shows...
Personalities : [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md124 : active raid1 sdd3[0]
7809175808 blocks super 1.2 [1/1] [U]
md125 : active raid1 sdc3[0]
2925415808 blocks super 1.2 [1/1] [U]
md126 : active raid1 sda3[0]
1948663808 blocks super 1.2 [1/1] [U]
md127 : active raid1 sdb3[0]
5855671808 blocks super 1.2 [1/1] [U]
md1 : active raid10 sda2[0] sdd2[3] sdc2[2] sdb2[1]
1044480 blocks super 1.2 512K chunks 2 near-copies [4/4] [UUUU]
md0 : active raid1 sda1[0] sdb1[3] sdd1[4] sdc1[1]
4190208 blocks super 1.2 [4/4] [UUUU]
unused devices: <none>
/dev/md/0:
Version : 1.2
Creation Time : Fri Nov 6 15:01:52 2020
Raid Level : raid1
Array Size : 4190208 (4.00 GiB 4.29 GB)
Used Dev Size : 4190208 (4.00 GiB 4.29 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Fri Mar 6 16:04:19 2026
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Consistency Policy : unknown
Name : 0e34093c:0 (local to host 0e34093c)
UUID : b1079eff:ca275c6a:4df7d648:6f176c9c
Events : 15605
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 8 33 1 active sync /dev/sdc1
4 8 49 2 active sync /dev/sdd1
3 8 17 3 active sync /dev/sdb1
/dev/md/1:
Version : 1.2
Creation Time : Thu Feb 12 16:44:04 2026
Raid Level : raid10
Array Size : 1044480 (1020.00 MiB 1069.55 MB)
Used Dev Size : 522240 (510.00 MiB 534.77 MB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Thu Mar 5 15:43:57 2026
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : near=2
Chunk Size : 512K
Consistency Policy : unknown
Name : 0e34093c:1 (local to host 0e34093c)
UUID : 9ecdbab8:7ecf3da9:299f9966:0fa46d04
Events : 19
Number Major Minor RaidDevice State
0 8 2 0 active sync set-A /dev/sda2
1 8 18 1 active sync set-B /dev/sdb2
2 8 34 2 active sync set-A /dev/sdc2
3 8 50 3 active sync set-B /dev/sdd2
/dev/md/NG-8TB-Seagate-0:
Version : 1.2
Creation Time : Thu Feb 12 16:44:07 2026
Raid Level : raid1
Array Size : 7809175808 (7447.41 GiB 7996.60 GB)
Used Dev Size : 7809175808 (7447.41 GiB 7996.60 GB)
Raid Devices : 1
Total Devices : 1
Persistence : Superblock is persistent
Update Time : Fri Mar 6 11:18:02 2026
State : clean
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Consistency Policy : unknown
Name : 0e34093c:NG-8TB-Seagate-0 (local to host 0e34093c)
UUID : 4a957007:c3c04e0b:0aacb1df:3a59d9e8
Events : 2
Number Major Minor RaidDevice State
0 8 51 0 active sync /dev/sdd3
/dev/md/NG-WDRED-2TB-1-0:
Version : 1.2
Creation Time : Fri Nov 6 20:50:32 2020
Raid Level : raid1
Array Size : 1948663808 (1858.39 GiB 1995.43 GB)
Used Dev Size : 1948663808 (1858.39 GiB 1995.43 GB)
Raid Devices : 1
Total Devices : 1
Persistence : Superblock is persistent
Update Time : Fri Mar 6 12:10:00 2026
State : clean
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Consistency Policy : unknown
Name : 0e34093c:NG-WDRED-2TB-1-0 (local to host 0e34093c)
UUID : d69ab251:67e359ac:16c640ee:2a0409c0
Events : 2
Number Major Minor RaidDevice State
0 8 3 0 active sync /dev/sda3
/dev/md/NG-WDRED-3TB-2-0:
Version : 1.2
Creation Time : Fri Nov 6 20:49:32 2020
Raid Level : raid1
Array Size : 2925415808 (2789.89 GiB 2995.63 GB)
Used Dev Size : 2925415808 (2789.89 GiB 2995.63 GB)
Raid Devices : 1
Total Devices : 1
Persistence : Superblock is persistent
Update Time : Fri Mar 6 12:10:00 2026
State : clean
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Consistency Policy : unknown
Name : 0e34093c:NG-WDRED-3TB-2-0 (local to host 0e34093c)
UUID : 1c072ab5:ea01a5d6:646d6d07:76776925
Events : 2
Number Major Minor RaidDevice State
0 8 35 0 active sync /dev/sdc3
/dev/md/NG-WDRP-6TB-1-0:
Version : 1.2
Creation Time : Tue Jul 18 15:55:20 2023
Raid Level : raid1
Array Size : 5855671808 (5584.40 GiB 5996.21 GB)
Used Dev Size : 5855671808 (5584.40 GiB 5996.21 GB)
Raid Devices : 1
Total Devices : 1
Persistence : Superblock is persistent
Update Time : Fri Mar 6 11:18:27 2026
State : clean
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Consistency Policy : unknown
Name : 0e34093c:NG-WDRP-6TB-1-0 (local to host 0e34093c)
UUID : 1d40ffff:601db1f8:20e41e54:f5650fa6
Events : 2
Number Major Minor RaidDevice State
0 8 19 0 active sync /dev/sdb3
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