Inaccessable ATAPI ZIP drive in Windows 98 with SCSI

After installing internal ATAPI ZIP drive when try
to access then error erected "Disk in drive X is not formatted" (disc
was formatted, of course). But when windows try to format it - they
say that ZIP have capacity 400MB. Under Win95 it worked OK and
also under DOS using GUEST.EXE.

Computer had boot SCSI disc and EIDE primary master disc (switched
off in BIOS to not to boot from it). Motherboard Gigabyte GA-586ATS,
SCSI Diamond Fireport 40. There were Bus mastering Intel 82430FX
miniport drivers (ideatapi.mpd) for IDE.

Problem was that Windows did not recognize disc topology (num of sectors,
sector size, ..) in ideatapi.mpd. Find key
`HKEY_LOCAL_MACHINE/System/CurrentControlSet/control/Services/Class/hdc`
and value coresponding to secondary driver (where is ZIP) - probably
`0002` and change value of PortDrive from "ideatapi.mpd" to "ESDI_506.pdr".
Reboot.