memstick.img is bloated with 7% 2K blocks of nulls

[dieterbsd at engineer.com]

Tim Kientzle wrote:
> The current UFS code is designed to leave enough "slack space" to
> support future file writes.

What if you turned the knob all the way down and had just one
cylinder group?  I assume that newfs would need to be fixed to
allow this, but would anything break?

The current limits are also wasteful for normal read/write
filesystems with large files.  Too many cylinder groups, too many
inodes, block/frag size too small, etc...