nvme raid1 cache error : Unmountable: no file system

[Yagami]

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

 

[Yagami]

(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

[JorgeB]

There are some recovery options here:

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

 

[Yagami]

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