System type would be a great help, (you can lie to fat 16/32 file systems, NTFS is trickeere).
BTW - Have retrieved HD/Floppy OS and Data using Debug / Hexedit (very powerful) is god so be careful ! Write to the wrong place and files/data are gone !
Reread your post ! Is the drive using the foppy setup (came with the HD) for LDF (Large Disk Format), maybe using the OEM program for an over 2G disk. This would create a problem using the above tools, Not using a w$ is view only!
FYI - For 2 years have been trying to acces HD with on-board HD controller failure, (would not boot after 16 hours, HD ID failure) yours ID's the HD but says there is no OS leading me to believe the overlay program is corrupted, for large disk support. May be able to reload overlay and retrieve the data. IF it says all data wil be destroyed or will format the HD, back out quickly !