Cache pool lost - both disks - unmountable no file system BTRFS

[Xutho]

Dear folks, 

unfortunately my server decided this night to crash both of his cache-ssd´s and i have no clue how this gonna happen.... both of my ssd´s are 
unmountable... 

Restart ect. didn´t work but i´m a little carefully about the next steps - i found in forum already several articles but mostly they had only 1 cache drive and did a format-disc .. but 2 devices aren´t readable in the same time is kinda strange?

So maybe someone has an idea whats going on... 
I did no changes on the system which can caused that issue - but! it happens during my nightly backup-process excatly when 
"VM-Backup" was trying to backup my first VM exactly before this process starts i have "AppData Backup/Restore V2" running for Docker-Backup


If its necassary i have my backups but would be a lot of "manual" work to get all that stuff in place again.... maybe there is a easier fix?

Thanks ❤️

xutho-unraid-diagnostics-20221003-1843.zip

[JorgeB]

File system is damaged, see here for some recovery options:

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

 

[Xutho]

9 minutes ago, JorgeB said:

File system is damaged, see here for some recovery options:

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

 

Thanks

mount -o degraded,rescue=all,ro /dev/nvme0n1p1 /temp

 

worked successfully getting the data back!! Afterwards fully format for cache devices i assume right? (is btrfs still the first-choice as fs?)

[JorgeB]

1 minute ago, Xutho said:

Afterwards fully format for cache devices i assume right?

The problem appear to be the log tree, after it's the backup is complete you can try:

btrfs rescue zero-log /dev/nvme0n1p1

And if that doesn't work format.

 

Btrfs is currently the only option for pools.

[Xutho]

1 hour ago, JorgeB said:

The problem appear to be the log tree, after it's the backup is complete you can try:

btrfs rescue zero-log /dev/nvme0n1p1

And if that doesn't work format.

 

Btrfs is currently the only option for pools.

Fully worked  everything fine now !!!

Thanks a lot buddy