TerraMaster Forum

I had a bad drive in my TOS 6 system.
Got a replacement drive
Inserted it into NAS
NAS recognized it
I went into storage pool
Selected the TRAID pools and then edit
Selected Repair
The program found the new drive, gave me all the usual warnings about all the data on the new drive
I selected Confirm
Then done

At this point (and this happened fast, but ) a green banner came up saying configuration saved. (at least that is what I think I saw.)
And then nothing... I have done this before and I normally see "Syncing" bar... But nothing.

It is a 5 drive TRAID in which drive 2 failed.

something@TNAS:/var/log# cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] [faulty]
md3 : active raid1 sdza4[0]
489574592 blocks super 1.2 [1/1]

md2 : active raid1 sde5[0] sdc5[1]
3907645512 blocks super 1.2 [2/2] [UU]

md1 : active raid1 sda5[0]
7812504304 blocks super 1.2 [2/1] [U_]

md0 : active raid5 sdc4[5] sdb4[4](F) sda4[3] sdf4[2] sde4[6]
15583297536 blocks super 1.2 level 5, 512k chunk, algorithm 2 [5/4] [UUUU_]

md8 : active raid1 sdza3[0]
1997824 blocks super 1.2 [1/1]
bitmap: 0/1 pages [0KB], 65536KB chunk

md9 : active raid1 sdza2[0]
7995392 blocks super 1.2 [1/1]
bitmap: 1/1 pages [4KB], 65536KB chunk

unused devices: <none>




Any help would be approciated

Thanks Steve

From the logs when I did the commands:

Sep 15 14:05:20 TNAS TOSDaemon[5897]: Decrypted data: {"action":"fix","disks":["/dev/sdb"]}
Sep 15 14:05:20 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm --detail --scan | grep /dev/md3 |grep UTOSFC-X86-S64]
Sep 15 14:05:20 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm --detail --scan | grep /dev/md0 |grep UTOSFC-X86-S64]
Sep 15 14:05:20 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm --detail --scan | grep /dev/md1 |grep UTOSFC-X86-S64]
Sep 15 14:05:21 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm --detail --scan | grep /dev/md3 |grep UTOSFC-X86-S64]
Sep 15 14:05:21 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm --detail --scan | grep /dev/md0 |grep UTOSFC-X86-S64]
Sep 15 14:05:21 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm --detail --scan | grep /dev/md1 |grep UTOSFC-X86-S64]
Sep 15 14:05:21 TNAS kernel: [ 219.977253] sdb: sdb1 sdb2 sdb3 sdb4 sdb5
Sep 15 14:05:22 TNAS kernel: [ 220.611581] BTRFS info: devid 1 device path /dev/mapper/vg1-lv1 changed to /dev/dm-0 scanned by systemd-udevd (12612)
Sep 15 14:05:22 TNAS systemd-udevd[12612]: dm-0: Failed to create/update device symlink '/dev/mapper/vg1-lv1', ignoring: File exists
Sep 15 14:05:22 TNAS kernel: [ 220.612877] BTRFS info: devid 1 device path /dev/dm-0 changed to /dev/mapper/vg1-lv1 scanned by systemd-udevd (12612)
Sep 15 14:05:22 TNAS kernel: [ 220.743520] BTRFS info: devid 1 device path /dev/mapper/vg0-lv0 changed to /dev/dm-1 scanned by systemd-udevd (12624)
Sep 15 14:05:22 TNAS systemd-udevd[12624]: dm-1: Failed to create/update device symlink '/dev/mapper/vg0-lv0', ignoring: File exists
Sep 15 14:05:22 TNAS kernel: [ 220.744919] BTRFS info: devid 1 device path /dev/dm-1 changed to /dev/mapper/vg0-lv0 scanned by systemd-udevd (12624)
Sep 15 14:05:22 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm -D /dev/md2 | grep 'Check Status']
Sep 15 14:05:22 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm -D /dev/md3 | grep 'Check Status']
Sep 15 14:05:22 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm -D /dev/md0 | grep 'Check Status']
Sep 15 14:05:22 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm -D /dev/md1 | grep 'Check Status']
Sep 15 14:05:22 TNAS kernel: [ 221.220504] BTRFS info: devid 1 device path /dev/mapper/vg0-lv0 changed to /dev/dm-1 scanned by systemd-udevd (12610)
Sep 15 14:05:22 TNAS systemd-udevd[12610]: dm-1: Failed to create/update device symlink '/dev/mapper/vg0-lv0', ignoring: File exists
Sep 15 14:05:22 TNAS systemd-udevd[12612]: dm-0: Failed to create/update device symlink '/dev/mapper/vg1-lv1', ignoring: File exists
Sep 15 14:05:22 TNAS kernel: [ 221.221892] BTRFS info: devid 1 device path /dev/dm-1 changed to /dev/mapper/vg0-lv0 scanned by systemd-udevd (12610)
Sep 15 14:05:22 TNAS kernel: [ 221.222153] BTRFS info: devid 1 device path /dev/mapper/vg1-lv1 changed to /dev/dm-0 scanned by systemd-udevd (12612)
Sep 15 14:05:22 TNAS kernel: [ 221.223914] BTRFS info: devid 1 device path /dev/dm-0 changed to /dev/mapper/vg1-lv1 scanned by systemd-udevd (12612)
Sep 15 14:05:23 TNAS systemd-udevd[12624]: dm-0: Failed to create/update device symlink '/dev/mapper/vg1-lv1', ignoring: File exists
Sep 15 14:05:23 TNAS kernel: [ 221.691475] BTRFS info: devid 1 device path /dev/mapper/vg1-lv1 changed to /dev/dm-0 scanned by systemd-udevd (12624)
Sep 15 14:05:23 TNAS kernel: [ 221.693745] BTRFS info: devid 1 device path /dev/dm-0 changed to /dev/mapper/vg1-lv1 scanned by systemd-udevd (12624)
Sep 15 14:05:23 TNAS systemd-udevd[12610]: dm-1: Failed to create/update device symlink '/dev/mapper/vg0-lv0', ignoring: File exists
Sep 15 14:05:23 TNAS kernel: [ 221.709797] BTRFS info: devid 1 device path /dev/mapper/vg0-lv0 changed to /dev/dm-1 scanned by systemd-udevd (12610)
Sep 15 14:05:23 TNAS kernel: [ 221.711359] BTRFS info: devid 1 device path /dev/dm-1 changed to /dev/mapper/vg0-lv0 scanned by systemd-udevd (12610)
Sep 15 14:05:23 TNAS kernel: [ 221.957035] sdb:
Sep 15 14:05:23 TNAS kernel: [ 222.078446] sdb: sdb1
Sep 15 14:05:23 TNAS kernel: [ 222.263183] sdb: sdb1 sdb2
Sep 15 14:05:24 TNAS kernel: [ 222.442966] sdb: sdb1 sdb2 sdb3
Sep 15 14:05:25 TNAS kernel: [ 224.124486] sdb: sdb1 sdb2 sdb3 sdb4
Sep 15 14:05:25 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm -D /dev/md2 | grep 'Check Status']
Sep 15 14:05:25 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm -D /dev/md3 | grep 'Check Status']
Sep 15 14:05:25 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm -D /dev/md0 | grep 'Check Status']
Sep 15 14:05:25 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm -D /dev/md1 | grep 'Check Status']
Sep 15 14:05:26 TNAS kernel: [ 224.600522] BTRFS info: devid 1 device path /dev/mapper/vg1-lv1 changed to /dev/dm-0 scanned by systemd-udevd (12624)
Sep 15 14:05:26 TNAS systemd-udevd[12624]: dm-0: Failed to create/update device symlink '/dev/mapper/vg1-lv1', ignoring: File exists
Sep 15 14:05:26 TNAS kernel: [ 224.602556] BTRFS info: devid 1 device path /dev/dm-0 changed to /dev/mapper/vg1-lv1 scanned by systemd-udevd (12624)
Sep 15 14:05:26 TNAS systemd-udevd[12610]: dm-1: Failed to create/update device symlink '/dev/mapper/vg0-lv0', ignoring: File exists
Sep 15 14:05:26 TNAS kernel: [ 224.617060] BTRFS info: devid 1 device path /dev/mapper/vg0-lv0 changed to /dev/dm-1 scanned by systemd-udevd (12610)
Sep 15 14:05:26 TNAS kernel: [ 224.618944] BTRFS info: devid 1 device path /dev/dm-1 changed to /dev/mapper/vg0-lv0 scanned by systemd-udevd (12610)
Sep 15 14:05:26 TNAS kernel: [ 224.791373] sdb: sdb1 sdb2 sdb3 sdb4 sdb5
Sep 15 14:05:26 TNAS kernel: [ 225.194589] BTRFS info: devid 1 device path /dev/mapper/vg1-lv1 changed to /dev/dm-0 scanned by systemd-udevd (12624)
Sep 15 14:05:26 TNAS systemd-udevd[12624]: dm-0: Failed to create/update device symlink '/dev/mapper/vg1-lv1', ignoring: File exists
Sep 15 14:05:26 TNAS kernel: [ 225.195695] BTRFS info: devid 1 device path /dev/dm-0 changed to /dev/mapper/vg1-lv1 scanned by systemd-udevd (12624)
Sep 15 14:05:26 TNAS systemd-udevd[12610]: dm-1: Failed to create/update device symlink '/dev/mapper/vg0-lv0', ignoring: File exists
Sep 15 14:05:26 TNAS kernel: [ 225.208532] BTRFS info: devid 1 device path /dev/mapper/vg0-lv0 changed to /dev/dm-1 scanned by systemd-udevd (12610)
Sep 15 14:05:26 TNAS kernel: [ 225.210035] BTRFS info: devid 1 device path /dev/dm-1 changed to /dev/mapper/vg0-lv0 scanned by systemd-udevd (12610)
Sep 15 14:05:26 TNAS kernel: [ 225.264192] sdb: sdb1 sdb2 sdb3 sdb4 sdb5
Sep 15 14:05:27 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm -D /dev/md3 | grep 'Check Status']
Sep 15 14:05:27 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm -D /dev/md0 | grep 'Check Status']
Sep 15 14:05:27 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm -D /dev/md1 | grep 'Check Status']
Sep 15 14:05:27 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm -D /dev/md2 | grep 'Check Status']
Sep 15 14:05:28 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm --detail --scan | grep /dev/md3 |grep UTOSFC-X86-S64]
Sep 15 14:05:28 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm --detail --scan | grep /dev/md0 |grep UTOSFC-X86-S64]
Sep 15 14:05:28 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm --detail --scan | grep /dev/md1 |grep UTOSFC-X86-S64]
Sep 15 14:05:28 TNAS TOSDaemon[5897]: [DEBUG /bin/bash -c mdadm -DY /dev/md1 | grep 'MD_DEVICE_sd[a-z]\+4_DEV=/dev/sd[a-z]\+4']

sts41 wrote: ↑16 Sep 2026, 01:29

According to your /proc/mdstat, the old failed partition sdb4[4](F) is still registered under md0. Because it has not been completely detached/cleared by the system, the new drive cannot be bound to initiate the rebuild process.

Please go to TOS Desktop > Support & Help > Issue Report, generate a diagnostic report, and send it to our technical support email (support(@)terra-master.com) so we can investigate further.