ReadyTIER log message...problem?

I've had more luck than I deserved...I managed to get the volume to mount after using a 'btrfs rescue zero-log' (checked the system logs for errors during the mount and it was failing during log recovery).  I'm sure there's some form of data loss, but the systems weren't under heavy use during the middle of the night, so I'm hoping it's minimal.

In the meantime I have turned ReadyTIER from data tiering to metadata tiering only.  If I can find a definitive answer as to whether it's safe to remove the SSD tier without destroying the volume, I'm going to get rid of the tiering entirely...it just doesn't seem ready for prime time.

I also think it's time to get a new NAS...I'll relegate this unit to other duties.  Haven't decided whether I'll get another Netgear or look at other brands that shall remain nameless.