WD drives have differed in their jumpers. You should find a label on the drive, however, to assist. The best way is to use an 80 conductor cable and set both devices to CS or Cable Select. Search here if you need more info.
I am going to be changing the configuration on an XP machine and need to know where to put the jumper on the hard drive if there is going to be a DVD drive added as a slave to the same cable??
It is a Western Digital 40GB drive and is new.
Thanks for the help in advance.