Comment # 3 on bug 1145841 from David Diaz

Thank you so much for attaching the logs, Kai.

They have been useful for us to find the problem: right now, only Btrfs is
being considered as a multi-device filesystem[1][2]. 

Technical details are a little bit complex and long to explain here now, but
I'll add the bug report to our queue to be prioritized and to keep it updated
with our conclusions and decisions.

[1]
https://github.com/yast/yast-storage-ng/blob/a0cb655eed01b5c7004e2fffa3dacb1d8ea51f0f/src/lib/y2storage/filesystems/blk_filesystem.rb#L140-L142
[2]
https://github.com/yast/yast-storage-ng/blob/a0cb655eed01b5c7004e2fffa3dacb1d8ea51f0f/src/lib/y2partitioner/widgets/blk_devices_table.rb#L284-L285