USB can't mount msdosfs drive

[Joseph Mays]

> Maybe the "large" option to mount_msdosfs(8)?

> Also, something is odd about the first partition starting at 8064. 
> What does 'gpart show da2' say?

root at warehouse:/backups # gpart show da2
=>      63  30481089  da2  MBR  (14G)
        63      8001       - free -  (3.9M)
      8064  30473088    1  !12  [active]  (14G)