Comment 5 for bug 1681658

This is a poor design decision in my opinion and took a while for me to debug since it breaks previous behavior. We primarily run cinder backed volumes but need to specify the flavor disk size so that static images with fixed disks work properly.

Can you at least add a config option to spoof/change the max_unit? Or a max_unit_multiplier that works like the disk_allocation_ratio used to?