From owner-freebsd-hackers@FreeBSD.ORG  Fri Jun 20 10:44:44 2003
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Date: Fri, 20 Jun 2003 13:50:00 -0400
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From: "cd_freebsd" <cd_freebsd@gatorzone.com>
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Subject: Removable Media in FreeBSD
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In linux, there are two functions specifically for removable media drivers (like floppy & cdrom), namely, check_media_change and revalidate. 

Is there a corresponding set of functions in FreeBSD? How do you tell if a diskette has changed?