Array Starting•Mounting disks... Help

[Claudio C]

My unraind is in this status "Array Starting•Mounting disks..." after that I removed a disk from a pool.

 

I followed this guida

https://wiki.unraid.net/Manual/Storage_Management#Removing_disks_from_a_multi-device_pool

 

It is in this status from more than 4 hours. What can I do ? do I have to still waiting ?

 

 

[JorgeB]

That's not normal, see you can get the diags by typing "diagnostics" in the console, then attach here.

[Claudio C]

root@Tower:~# diagnostics
Starting diagnostics collection... 

 

 

No data , do you think that I can restart the server ?

[Squid]

Let it sit for a couple more minutes.

 

Failing that, after CTRL-C to exist the command,

cp /var/log/syslog /boot

and then upload the syslog file that is now stored on the flash drive

[Claudio C]

here the file

syslog

[JorgeB]

May 17 11:06:38 Tower kernel: BTRFS: error (device sdb1) in do_chunk_alloc:3467: errno=-28 No space left
May 17 11:06:38 Tower kernel: BTRFS info (device sdb1): forced readonly

 

Balance aborted due to no space left, grab the output of:

 

btrfs fi usage -T /mnt/cache

 

Then post that and reboot, this issue shouldn't prevent GUI access.

[Claudio C]

May 17 19:51:29 Tower kernel: BTRFS: error (device sdb1) in do_chunk_alloc:3467: errno=-28 No space left
May 17 19:51:29 Tower kernel: BTRFS info (device sdb1): forced readonly

[Claudio C]

 

Now I have this error:

 

[JorgeB]

Did you get this?

1 hour ago, JorgeB said:

grab the output of:

 

btrfs fi usage -T /mnt/cache

 

Then post that and reboot,

 

Also please post new diags.

[Claudio C]

ERROR: cannot access '/mnt/cache': No such file or directory

[Claudio C]

 

[Claudio C]

Starting diagnostics collection... sh: -c: line 1: unexpected EOF while looking for matching `''
sh: -c: line 2: syntax error: unexpected end of file
sh: -c: line 1: unexpected EOF while looking for matching `''
sh: -c: line 2: syntax error: unexpected end of file
done.
ZIP file '/boot/logs/tower-diagnostics-20220517-2105.zip' created.

[Claudio C]

here the files

tower-diagnostics-20220517-2105.zip

[Claudio C]

Hi JorgeB

do you have an idea how I can fix the issues ?

 

thanks 

 

[Claudio C]

these are  error that I have in log of cache disk:

ay 18 06:32:50 Tower kernel: BTRFS error (device sdb1): devid 2 uuid b7a2b6e5-effb-48f3-8fbe-34b212a45d2c is missing
May 18 06:32:50 Tower kernel: BTRFS error (device sdb1): failed to read the system array: -2
May 18 06:32:50 Tower kernel: BTRFS error (device sdb1): open_ctree failed
May 18 06:32:50 Tower root: mount: /mnt/cache: wrong fs type, bad option, bad superblock on /dev/sdb1, missing codepage or helper program, or other error.

 

Do you think that I lost all cache data ?

[JorgeB]

12 hours ago, Claudio C said:

ERROR: cannot access '/mnt/cache': No such file or directory

Now it won't work since the pool is not mounting, I asked before rebooting, but it doesn't matter now.

 

Stop the array, unassign al pool devices, start array, stop array, run

btrfs-select-super -s 1 /dev/nvme0n1p1

 

Reboot and post new diags before array start.

[Claudio C]

here the files 

 

tower-diagnostics-20220518-1121.zip

[JorgeB]

Now start the array with both cache devices unassigned, then stop the array, assign both devices to the same pool, start the array and post new diags, if it mounts there's a chance the fs will go read only again, if that happens we can try to mount manually with skip_balance.

[Claudio C]

It works :-)))) I'm so happy thanks a lot .

 

now If I want to remove a disk from the pool and use it as dedicated pool for the VM what do I have to do ?

 

 

tower-diagnostics-20220518-1320.zip

[JorgeB]

Good, first make sure backups are up to date, then you need to re-balance the pool, after that's done and there's some unallocated space you can remove the device, in doubt post new diags before doing it.

[Claudio C]

Ok I execute this command 

Ibtrfs balance start -dusage=75 /mnt/cache

 

outcome:

 

Overall:
    Device size:                 931.52GiB
    Device allocated:            931.52GiB
    Device unallocated:            3.02MiB
    Device missing:                  0.00B
    Used:                        593.10GiB
    Free (estimated):            166.57GiB      (min: 166.57GiB)
    Free (statfs, df):           166.57GiB
    Data ratio:                       2.00
    Metadata ratio:                   2.00
    Global reserve:              154.06MiB      (used: 0.00B)
    Multiple profiles:                  no

                  Data      Metadata  System               
Id Path           RAID1     RAID1     RAID1     Unallocated
-- -------------- --------- --------- --------- -----------
 1 /dev/sdb1      462.70GiB   3.00GiB  64.00MiB     1.99MiB
 2 /dev/nvme0n1p1 462.70GiB   3.00GiB  64.00MiB     1.02MiB
-- -------------- --------- --------- --------- -----------
   Total          462.70GiB   3.00GiB  64.00MiB     3.02MiB
   Used           296.12GiB 434.41MiB 112.00KiB    

 

next steps are :

1. stop array

2. remove the device

3. Start the array 

4. stop array create you pool 

5. assign the disk to the new pool 

 

is it this way ?

 

 

 

attached the diagnostics.

 

 

 

 

 

 

tower-diagnostics-20220518-1530.zip

[JorgeB]

Still not enough unallocated space, try with -dusage=90, if you get an error you might need to move/delete some data first.

[Claudio C]

done 

root@Tower:~# btrfs balance start -dusage=90 /mnt/cache
Done, had to relocate 42 out of 318 chunks
 

Can I go on with these steps ?

 

next steps are :

1. stop array

2. remove the device

3. Start the array 

4. stop array create you pool 

5. assign the disk to the new pool 

 

 

 

 

tower-diagnostics-20220518-1703.zip

[JorgeB]

Yes, now it should be fine.

[Claudio C]

HI JorgeB,

 

just to confirm that all works now. I created the second pool for the VM.

Thank a lot for your help .... you are the best 🙂

 

Grazie

Claudio