Non brilliant idea No 1 "initialised" - isn't that the fundamental start point declaring the partition of a HD? - setting out the stall prior to formatting?
Dim idea No 2 - "I just received a SCSI HDD from eBay and it has verified completely error free. Ther board is 11 and I have jumpered the HDD to 2. "........... It isn't clear (to me)just how you managed to verify it, and the "board number" - I have an Adaptec SCSI card accessible by Cntrl A at bootup, but your card is probably very different.
Sorry if these ideas seem all wrong to the expert, but I hope it may throw up a better course of action from just waving ideas about.
Disconnect main HD.... In the BIOS change first boot device to floppy, and second boot device to SCSI......... Boot with the 98 startup disk in the slot.....and hope that the SCSI HD is now available for FDISK and Format !!
If this works then obviously pop things back as they were so that the PC boots normally.
(I don't have XP but numerous threads imply that it has its own way of doing things and anyway doesn't use DOS. This is my excuse for going back to the Stone Age trail so to speak)