mtools can't access drive A

[Steven Friedrich]

I just installed mtools today.  I'm tracking 4.10 STABLE and my ports tree was 
updated yesterday.

I get an error:
root at lightning(p1)/usr/src 114% mdir a:
Can't open /dev/fd0.720: Device not configured
Cannot initialize 'A:'


dev says:
root at lightning(p1)/dev 116% ll fd0*
crw-r-----  18 root  operator    9,   0 Jul  7 01:00 fd0
crw-r-----   2 root  operator    9,   4 Jul  7 01:00 fd0.1200
crw-r-----   2 root  operator    9,  10 Jul  7 01:00 fd0.1232
crw-r-----   2 root  operator    9,   3 Jul 29 00:39 fd0.1440
crw-r-----   2 root  operator    9,   2 Jul  7 01:00 fd0.1480
crw-r-----   2 root  operator    9,   1 Jul  7 01:00 fd0.1720
crw-r-----   2 root  operator    9,   8 Jul  7 01:00 fd0.360
crw-r-----   2 root  operator    9,   9 Jul  7 01:00 fd0.640
crw-r-----   2 root  operator    9,   7 Jul  7 01:00 fd0.720
crw-r-----   2 root  operator    9,   6 Jul  7 01:00 fd0.800
crw-r-----   2 root  operator    9,   5 Jul  7 01:00 fd0.820
crw-r-----  18 root  operator    9,   0 Jul  7 01:00 fd0a
crw-r-----  18 root  operator    9,   0 Jul  7 01:00 fd0b
crw-r-----  18 root  operator    9,   0 Jul  7 01:00 fd0c
crw-r-----  18 root  operator    9,   0 Jul  7 01:00 fd0d
crw-r-----  18 root  operator    9,   0 Jul  7 01:00 fd0e
crw-r-----  18 root  operator    9,   0 Jul  7 01:00 fd0f
crw-r-----  18 root  operator    9,   0 Jul  7 01:00 fd0g
crw-r-----  18 root  operator    9,   0 Jul  7 01:00 fd0h

I first saw this on my -CURRENT box and figured it was devfs related, but I 
hadn't researched it yet. Now I have it on my -STABLE boxes.

Any ideas?