Re: Large BTRFS array suddenly says 53TiB Free, usage inconsistent

Holger Hoffstätte
2021-11-14T19:16:30Z

On 2021-11-14 19:45, Max Spliethöver wrote:
> Hello everyone. I observed the exact same behavior on my 2x4TB RAID1.
> After an update of my server that runs a btrfs RAID1 as data storage
> (root fs runs on different, non-btrfs disks) and running `sudo btrfs
> filesystem usage /tank`, I realized that the "Data ratio" and
> "Metadata ratio" had dropped from 2.00 (before upgrade) to 1.00 and
> that the Unallocated space on both drives jumped from ~550GB to
> 2.10TB. I sporadically checked the files and everything seems to be
> still there.
>
> I would appreciate any help with explaining what happened and how to
> possibly fix this issue. Below I provided some information. If
> further outputs are required, please let me know.
>
> ```
> $ btrfs --version
> btrfs-progs v5.15
---------------^^

https://github.com/kdave/btrfs-progs/issues/422

Try to revert progs to 5.14.x.

cheers
Holger