Partitioning (Spliting a drive) cannot be done todays Vendor system. The Recovery Disks create an image of the drive allowing only recovery or destrictive restore.
With a true XP CD on install ''X'' amount of drive can be assigned for install. After install via Disk Managment the balance of drive can be partitioned and activated.
External drives have to be properly formated for use and work the same as an internal drive. Your attempt install of XP to this drive may have corupted it. Use Disk Managment to reformat the drive.
For more information see
Retired's and Toni's post.
Actually a 2 part but will be short. First, wanted to partition home HDD so Win-XP loaded then use back side for actual usage, ie; games & media. Thought being, use front for just oper sys loadup and back to prevent damage from virus, hacks, and minimizing formats should bad things happen. Problem, I do not know how to switch or use correctly so stuck with using entire drive. Second, close to first, have laptop and external HDD via USB, thought I could put XP on external but find can not. Do I assume the external is simply where you transferr files to and is not actuall used because when I tried to retrieve a file it could not be found, read, used, recognized or had any program to open it. Not a newbie but feel like one. Any help, advise or direction is greatly appreciated. More info on either system available if it would help.