Hi, Under FreeBSD 4.x the ioctl DIOCGDINFO could be used to retrieve the number of cylinders, heads and sectors of a drive. This could be called on /dev/ad0 for example. Under FreeBSD 5 it seems to produce "Inappropriate ioctl for device" unless you call it on an individual partition (/dev/ad0s1a for example). Is there a way around this? Thanks, Andrew