BIOS Bug: CD/DVD doesn't boot in certain setups

nuc wrote: What SATA driver are you using for the Intel SATA controller? That will be shown in Device Manager, either under IDE ATA/ATAPI controllers, or Storage Controllers. I'm wondering if the Intel AHCI driver would improve the situation. Why would other drivers improve the situation? The drivers are not being loaded at all, since Windows doesn't even get started... What are the two models of optical drives you are using? My drives are Pioneer BDR-S09XLT and LiteOn iHAS324. After reading some of this, you may understand why the ordering might make a difference. This is a good example of what happens when multiple storage protocols (SATA and IDE) are combined together into one logical interface as the user sees it. Things are not as separate and independent of each other as we would assume they would be. It seems to me after going over just what I posted above, there must be more to configuring and using the SATA and IDE interfaces on your board and BIOS than I am aware of. I also don't see any reason for the idea there will be other unpredictable results when using standard HDDs in any order. Hm yeah, interesting thought

So you are booting from the disks in these optical drives. So the only thing that can be used is the storage Option ROMs in the BIOS. But since it is either AHCI or IDE mode, there isn't a storage Option ROM that can be used.

Also, we are talking a true legacy BIOS firmware, just a 16Kbit BIOS chip, on a board and chipset that supports IDE drives.

Will a BluRay (BD) drive work without a driver or Option ROM, on a SATA port that is shared with and IDE interface? I would not depend on it.