Started a few days ago. 

 

Unraid vm's and docker go no longer accessible to users.

 

Unraid GUI is accessible but uptime is not showing top right and some screens do not load (like the array operation). Command line will not clean shutdown the server (waited hours), so have had to hard reboot it.

 

There are some upstream timed out errors from nginx but im having issues working out the cause.

storage-diagnostics-20190817-0323.zip

One of your cache devices is missing, if this is on purpose you need to manual balance the pool or the missing device won't be deleted because of this bug.

Thanks Johnnie, this does seem to be the cause (looks like one died) I also found this thread too.

 

With the output of actions below.

root@storage:~# btrfs device delete missing /mnt/cache
root@storage:~# btrfs balance start -f -mconvert=single /mnt/cache
Done, had to relocate 4 out of 158 chunks
root@storage:~# btrfs device delete missing /mnt/cache
ERROR: error removing device 'missing': no missing devices found to remove

I'll spin up the dockers and see if stays up now.
 

Probably a good idea to recreate the docker image.