Maybe. But to read the hard drive correctly, the hard drive parameters in CMOS must be correct. It is also possible to contract a "virus." None of these are corrected by the factory back up disk.CMOS also affects the ability to read the floppy.
What is necessary to resurrect a hard drive from scratch is a DOS 6.20 boot disk (to FDISK and format), a full set of DOS disks, and a version of machine software meant for DOS 6.20, and some DOS and PC knowledge.
How old is the hard drive? Is it original? If indeed the hard drive has issues, I would consider a DOM (disk on a Module).
Try going to DOS and doing a scan disk and a defrag. This may tell you something about the hard drive as well.
George
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)