Bill Studenmund <wrstuden@netbsd.org> writes:

> One thing I built into the wrstuden-dev-bsize branch was support for
> non-power-of-two block sizes; I now think that's not needed.

520 byte sector disks are not that uncommon (used with many raid
systems); we can of course choose to ignore this problem. Harder to
ignore is the 2352 byte sectors of audio CD:s.

/Johan