installation problem

[lhomer]

I have an asus-cubx motherboard with intel 440BX AGPset 100 MHZ W/ ATA100 and intel p3750EF, 750MHZ cpu I have two ide hard drives, either can boot windows with no difficulty The windows system reports a scsi device described as a "Windows 95-98 Promise Ultra 100 (tm) IDE controller (PDC20265) When I try to boot redhat 6.2, it stops when I try to select the type of installation and tells me I have no suitable medium (I guess no hard drive) When I try to boot the Debian SCSI version it tells me I have no hard drive. It doesn't find a SCSI, and it seems to have picked the irq's and addresses appropriate to the hard drives in ideo and ide1 listings, picks up my two cdroms (hdc and hdd) and a zip drive (hdb) ok, but no hard drive. It also reports the failure to initialize a WD-7000 SCSI card, despite a previous line stating no scsi card was found. The Debian IDE version also can't find a hard drive. What should I try?