Hi Everyone,
Rebooted the server to make some changes, and now the nvme cache is showing me the below error (error log below also).

Couple of notes :

- I run all dockers in this Cache and set to prefer cache

- I chose the "directory" mode in intial set-up for docker and not Vdisc)

 

The drives are still detected, and showing on the list of usable drives, but unraid is asking me to format

 

The error :

 

 

The Log :

Jan 9 06:15:51 Multiverse kernel: nvme0n1: p1
Jan 9 06:15:51 Multiverse kernel: BTRFS: device fsid 765f6f1d-a3a7-487b-a5db-2c284bf3918d devid 1 transid 21878 /dev/nvme0n1p1 scanned by udevd (1687)
Jan 9 06:16:16 Multiverse emhttpd: Sabrent_Rocket_Q4_7D37071518CD00000204 (nvme0n1) 512 3907029168
Jan 9 06:16:16 Multiverse emhttpd: import 31 cache device: (nvme0n1) Sabrent_Rocket_Q4_7D37071518CD00000204
Jan 9 06:16:16 Multiverse emhttpd: read SMART /dev/nvme0n1
Jan 9 06:16:23 Multiverse kernel: BTRFS info (device nvme0n1p1): turning on async discard
Jan 9 06:16:23 Multiverse kernel: BTRFS info (device nvme0n1p1): using free space tree
Jan 9 06:16:23 Multiverse kernel: BTRFS info (device nvme0n1p1): has skinny extents
Jan 9 06:16:23 Multiverse kernel: BTRFS info (device nvme0n1p1): enabling ssd optimizations
Jan 9 06:16:23 Multiverse kernel: BTRFS info (device nvme0n1p1): start tree-log replay
Jan 9 06:16:23 Multiverse root: mount: /mnt/nvme: wrong fs type, bad option, bad superblock on /dev/nvme0n1p1, missing codepage or helper program, or other error.
Jan 9 06:16:23 Multiverse kernel: BTRFS: error (device nvme0n1p1) in btrfs_replay_log:2279: errno=-22 unknown (Failed to recover log tree)
Jan 9 06:16:23 Multiverse kernel: BTRFS error (device nvme0n1p1): open_ctree failed

 

(After further reading here and there)

 

I'm able to navigate the content of the "unmountable Cache pool" using Linux commands (cd  / ls..)  folders and files seem to be there, but for some reason the cache is showing as unmountable.

 

Let me know guys if you faced same issue before.

Thanks

There are some recovery options here:

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

 

On 1/10/2022 at 3:17 PM, JorgeB said:

There are some recovery options here:

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

 

Thanks Jorge,

I ended-up restoring some data from it, and reformatting the drives, i chose Vdisc this time for the cache raid pool, hopefully restoring a Vdisc would be much easier in the future.

 

Thanks