Here are some problems that you might have with filesystems:
flashctl -p raw_mountpoint -u mount -t flash -r raw_mountpoint /mountpoint
where raw_mountpoint indicates the partition (e.g., /dev/fs0px).
find /proc/mount \ -name '[-0-9]*,[-0-9]*,[-0-9]*,[-0-9]*,[-0-9]*' \ -prune -print > mountpoints
cut -d, -f2 < mountpoints | sort -nu > pidlist
xargs -i pidin -p {} -F "%a %n %Q" < pidlist | less
grep pid mountpoints
use -i drivername
This procedure (which approximates the functionality of the Windows XP driverquery command) shows the drivers (programs that have mountpoints in the pathname space) that are currently running; it doesn't show those that are merely installed.