Pro Audio Spectrum 16 and SCSI HDD ... ?

Hello.

I'm trying to get an SCSI hard drive working, that is connected to my Pro Audio Spectrum 16. It is an HP Surestore 2000S.

Currently I have an SCSI CD-ROM connected to the PAS-16, and it is working fine.
When I connect the SCSI HDD and boot the computer from floppy disk, the PAS-16 SCSI driver reports that it finds both the CD-ROM and the HDD.
But even so, FDISK cannot "see" the HDD. So I can't configure it for use.

Do I need yet another driver loaded, to use the HDD? Or ???

Thanks in advance.