Cache Pool Unmountable, please help!

[Cheesemeister]

Hi all,

 

Last night something happened and I have no clue what. I was watching Plex (Docker) until about midnight and went to bed, 8am someone tried watching something on plex and it was missing. I went to check and I couldn't access the web UI, I checked a few other things and just decided to do a reboot. once it came back up my dockers, libvirt.img and most everything was gone. I noticed that both cache drives were there and In correct order, but it says unmountable: No File System. all of my VM's are on these drives.

 

Cache drives are 2 2tb NVMe's in raid 1

possibly I'm thinking they could have became too full overnight because of Deluge?

 

I have tried this to no avail. if anyone could help it would be much appreciated.

 

here is a screenshot of my disks in maintenance mode, as you can see both drives still show up without issue ( the unassigned device 2tb nvme was meant to be added to the cache pool to make it raid 5, just hadn't done it yet.) trust me that it hasn't been misplaced with a different 2tb drive as I have pictures of what drives and orders they should be.

P.S. if i need to post a file or anything, please just tell me how I can do that, Im not a super Linux savvy person, just attempting to be.

[trurl]

you should always

Go to Tools - Diagnostics and attach the complete Diagnostics ZIP file to your NEXT post in this thread.

[Cheesemeister]

Here, Thank you

 

btw, I have NOT tried the BTRFS check --repair

 

tower-diagnostics-20201118-1636.zip

Edited November 18, 2020 by Cheesemeister

[Cheesemeister]

It looks like in the logs the drives got overfilled and started reporting errors. Im unable to mount as it cannot find the FS type or something to do with the "superblock". 

[trurl]

Can you start the array normally and post new diagnostics? Lots of things we can't tell unless the disks are mounted.

[Cheesemeister]

Right now I've removed the 2 drives and booted it up in a Linux recovery usb I made awhile back, even in here it give me the same error like it cannot find the FS type. Also I misspoke earlier. The drive were in a raid 0 not a raid 1

[JorgeB]

Did you try the btrfs restore option in the FAQ? If that doesn't work best bet is to ask for help on IRC.

[Cheesemeister]

I have tried everything in the FAQ now, including btrfs repair. Which still couldnt even see the drives. When I load them both into a different machine with a linux rescue USB i can only see one drive, its very odd. i can see both in bios, but the OS only will ever see 1. 

 

I may end up having to wipe this and start over, what would peoples recommendations be on how to setup my cache in the future? I have 3 2tb nvme's. Should they be in btrfs raid 5, or btrfs all independent, or xfs?

 

Thanks for the help