ie. CD-ROM device is to be specified as "hdc1" and not "hdc"!
I installed one IDE HDD and one IDE CD-ROM and use filo in etherboot . Filo recognize the IDE hdd as hda, and the Cd-rom as hdb. in Config file I specify: AUTOBOOT_FILE = "hdb:/isolinux/vmlinuz initrd=/isolinux/initrd.img expert nofb acpi=off devfs=nomount #ramdisk_size=65536 console=ttyS0,115200"
it installs OS well . it seems we don't need to specify CDROM to hdb1 .hdb works well.
bxshi