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

["Max Spliethöver" <max@spliethoever.de>]

Hey Holger.
Thank you for the quick reply! The older btrfs-progs version does indeed report the numbers correctly. And also thanks for the pointer to the GitHub issue!

-Max

On 11/14/21 20:06, Holger Hoffstätte wrote:
> 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
>