Programmatically test for a DVD drive

[Joe Marcus Clarke]

I'm trying to figure out the best way to programmatically test to see if
a disc device is a DVD device.  That is, how can I tell the difference
between a CD-[ROM|R|RW] and a DVD-[ROM|R|RW]?  Is there a set method for
doing this, or should I just try to execute a DVD ioctl, and test to see
if it succeeds?  Thanks.

Joe 
-- 
Joe Marcus Clarke
FreeBSD GNOME Team	::	gnome at FreeBSD.org
FreeNode / #freebsd-gnome
http://www.FreeBSD.org/gnome
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