I've been using the disk in all my PCs and other services. Still when I get put it on the dell inspirion i always get the CALDERA DOS when booting...
Second dumb question: Are you certain that the Dell is booting from the DVD? Just for hoots and giggle, put some other bootable DVD in the drive and boot up. If it boots into whatever's on the DVD, you still have a mystery. If it boots to CALDERA DOS, we have a big clue.
And take that DOS floppy out of the floppy drive!