Cache: Unmountable: Unsupported or no file system (after update)

[BBenja]

Hi all,

 

just updated to 6.12.2. After the reboot, my cache drives (formated btrfs) show 'Unmountable: Unsupported or no file system'. (there is also a warning '... references non existent pool cache')

 

Please find my Diagnostics file attached. What can I do to fix the issue and prevent any data loss?

 

Thanks in advance and all the help and great work!

mule-diagnostics-20230705-1125.zip

[JorgeB]

Try this:

 

Stop array and unassign both pool devices

Start array (click checkbox "I want to do this")

Stop array

Reassign both pool devices

Start array, post new diags.

[BBenja]

42 minutes ago, JorgeB said:

Try this:

 

Thanks for the fast reply.

Done.

 

Please find the new diags. attached.

mule-diagnostics-20230705-1227.zip

[JorgeB]

Looks like it worked, everything looks OK.

[BBenja]

23 minutes ago, JorgeB said:

Looks like it worked, everything looks OK.

thanks so much

[nardiGray]

I have this exact same issue, unfortunately the solution didnt seem to work for me.

 

I have attached my diagnostics in case anyone happens to be able help. Will make a new thread if I dont hear back, thought I wouild post here first to keep all the info in one thread.

 

tower-diagnostics-20230705-2108.zip

[JorgeB]

37 minutes ago, nardiGray said:

unfortunately the solution didnt seem to work for me.

It wouldn't because it may have the same end result but 's not the same problem, log tree is damaged, if that is the only issue this may help:

 

btrfs rescue zero-log /dev/sdj1

 

Then re-start array.

[nardiGray]

 

50 minutes ago, JorgeB said:

It wouldn't because it may have the same end result but 's not the same problem, log tree is damaged, if that is the only issue this may help:

 

btrfs rescue zero-log /dev/sdj1

 

Then re-start array.

Thank you JorgeB, you were entirely correct and my cache is now normal. Apologies if my initial post confused anyone.

[DeKa]

Hello @JorgeB, I think I'm experiencing something similar to this... A few weeks ago, I updated Unraid to Version: 6.12.0 and upon rebooting the server, I'm getting the same error message as the one in the title of this post on the disks where I have BTRFS format. Could you help me resolve this? Thank you.

Edit: I have already tried both solutions mentioned in this thread, but without any positive results.

diagnostics-20230708-1621.zip

Edited July 8, 2023 by DeKa

[JorgeB]

20 hours ago, DeKa said:

I think I'm experiencing something similar to this...

Updating to v6.12.2 should fix your issue.

[DeKa]

Works, Gracias JorgeB!
Ty4All

[Server_home]

Hi Guys

I have lost all my VM's and Docker Service failed to start.

I saw that my cache drive is Unmountable: Unsupported or no file system

I can access to all my discs

Can someone help me to repair everything ?

tower-diagnostics-20231130-2252.zip

[JorgeB]

11 hours ago, Server_home said:

Can someone help me to repair everything ?

If the log tree is the only issue this may help:

btrfs rescue zero-log /dev/nvme0n1p1

Then restart the array.

[Server_home]

20 minutes ago, JorgeB said:

If the log tree is the only issue this may help:

btrfs rescue zero-log /dev/nvme0n1p1

Then restart the array.

JorgeB

I get this

 

root@Tower:~# btrfs rescue zero-log /dev/nvme0n1p1
Clearing log on /dev/nvme0n1p1, previous log_root 3102204461056, level 0
ERROR: failed to write super block for devid 1: flush error: No data available
ERROR: failed to write dev supers: No data available
WARNING: fsync on device 1 failed: No data available

[JorgeB]

That suggests there are other issues, you can try the recovery options here:

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=543490

 

[Server_home]

I think that the problem is that cache drive is Unmountable: Unsupported or no file system

Can I format it ?

All my docker data and vm's are  saved and accessible as you can see in the screenshot

 

By the way how can I add my vm's again to the VM tab so I can acess them ?

[JorgeB]

36 minutes ago, Server_home said:

Can I format it ?

You can but will lose all data there, including all your appdata and VMs,  if they were using that pool.

[Server_home]

But the cache drive is Unmountable: Unsupported or no file system so is there a way to recover it ?

 

I have the Vm iso files stored in other avaliable disks , can i recover a vm from a iso file ?

[JorgeB]

14 minutes ago, Server_home said:

But the cache drive is Unmountable: Unsupported or no file system so is there a way to recover it ?

 

1 hour ago, JorgeB said:

you can try the recovery options here:

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=543490

 

[Server_home]

when i do this step

mount -o usebackuproot,ro /dev/sdX1 /temp

I get this message

 root@Tower:/temp# mount -o usebackuproot,ro /dev/sdX1 /temp
mount: /temp: special device /dev/sdX1 does not exist.
       dmesg(1) may have more information after failed mount system call.

[JorgeB]

You need to replace sdX with the correct device, since it's an NVMe it should be

 

mount -o usebackuproot,ro /dev/nvme0n1p1 /temp

 

[Server_home]

i use this one

 

root@Tower:/temp# mount -o rescue=all,ro /dev/nvme0n1p1 /temp

 

now in /temp I have 3 folders

appdata/  domains/  system/

 

Do I save them, format the MVME and them copy the files to MVME ?

 

Edited December 1, 2023 by Server_home

[JorgeB]

Yes, copy everything to the array or somewhere else, confirm the data is good and then re-format and restore the data.

[Server_home]

Do you think that there is a problem with the mvme ?

Should I replace it ?

[Server_home]

1 hour ago, JorgeB said:

Yes, copy everything to the array or somewhere else, confirm the data is good and then re-format and restore the data.

Now that i already have the vmdk files , how can i put them back on again ?