Hi folks so I will attach diagnostics and explained what I tried to do:

 

I created a cache pool with 3 ssds in btrfs raid 1, that cache pool was emptied in the array prior with the recommended mover method as seen here:

 

https://docs.unraid.net/unraid-os/manual/storage-management/#adding-disks-to-a-pool

 

Everything was working fine but after that I decided to keep only 2 ssds in the multi device cache pool and remove nvmeOn1 to leave it in a separate pool unprotected since it will just contain new downloads so I thought I would avoid the fragmentation and leave the other 2 for more sensitive data.

 

The problem is after stopping the array and removing the drive and starting it I was was seeing an error in the cache pool saying a drive was missing as I was planning to be able to just reformat the pool with the 2 devices but apparently no so I decided to stop the array and figure out what's wrong.

 

The array got stuck while stopping for a very long time so I sent a reboot signal and it turned off but after that I found myself unable to start the WEB UI.

When I try to force start nginx and php-fpm I get an error 500

 

I am able to access the login page when running these commands but after that, it's a blank screen

 

when I run wget unraid_IP, I get a connection refused with all of them

 

I have currently a flash backup on unraid connect but I am afraid the moment at which the backup was made is way too close and could be in the middle of when the problem occured... My guess is that is was an automated flash backup made when I shutdown the system? What I coincidence as I just had set it to do cloud backups a few days ago.

 

Let me know if you have any clue by checking the logs or if I could just slap in a new unraid install on the same usb key and restore parts of the old install selectively. Ideally I would prefer to solve this without restoring the usb config.

 

Thanks in advance.

 

 

 

 

tower-diagnostics-20250323-2322.zip syslog

Ok I managed to boot to the gui by taking cache.cfg out of the usb drive.

 

The cache drives were empty so no issue here but as I tried recreating 2 pools I still get an error message concerning the nvme drive as you can see in the pic, how can I just remove it from that pool and have just cache 1 and 2, after all before starting the array, I made sure to place that disk in another pool.

 

Could it be due to the fact that all 3 disks were initially configured in raid1 so 'they keep looking for each other' in simple words?

 

At this point all I want is use the 2 500gb drives together and the nvme by itself for downloads.

 

Let me know if you have any clue.

 

Thanks again.

There's a bug with 7.0.x when removing btrfs pool devices, you need to finish manually, please post the current diags with the array started.

Following, I have same error - just occurred, no logs yet, removing cache.cfg has not instantly worked.  I now have to read up how to get logs if it will not boot.

******Edit******

OK, so it was not my cache pool drive that I had tampered with, it was a second pool drive of 3 hdd.  When I deleted the .cfg for that set, the server has booted and I can access the GUI

 

 

Edited March 24, 20251 yr by Sajer

14 hours ago, JorgeB said:

you need to finish manually

Thats what my wife told me 😂

 

More seriously, yes after the parity check is done by tomorrow morning, I will generate other diags and post them.

 

Thanks again.

11 hours ago, Sajer said:

Following, I have same error - just occurred, no logs yet, removing cache.cfg has not instantly worked.  I now have to read up how to get logs if it will not boot.

******Edit******

OK, so it was not my cache pool drive that I had tampered with, it was a second pool drive of 3 hdd.  When I deleted the .cfg for that set, the server has booted and I can access the GUI

 

Be careful though my friend as the only reason I deleted that config file in my case is because I knew the drives were empty, I wouldn't recommend if you have precious data on them.