Just in case someone else hasn't already responded, the P112 does not use DOS style fdisk partitioning for a hard disk. It is done in the BIOS image, and then the logical disks have to be initialized. This is described in the "P112 GIDE Construction.pdf" document.
I've only used 3.5" floppies, which work fine. You can also attach a PATA CD-ROM drive and access disks with a program that escapes my memory at the moment.
