Windows XP doesn’t find hard drive yet there is

This is a very common scenario I encountered hundreds of times.
While I know for sure the hard drive exist and works correctly, on a clean Windows XP install the software can’t find any hard drive, or if I’m installing Vista, it halts at around 80%.

I know that this sounds weird, but the issue happens usually with SATA hard disks and almost never with traditional IDE hard disks. The problem in 99% of the cases is that by default the SATA hard drives work in AHCI (Advanced Host Controller Interface) mode, that’s not good for XP because it wasn’t designed to work in that mode.

To solve the issue you simply have to enter the BIOS and switch the SATA mode from AHCI to IDE.

A much complicated solution is to get AHCI drivers for the hard disk and during install load them from a floppy disk. The problem appears if you want to install on a notebook, since modern notebooks don’t have floppy drives.

That was all. This solution will work both for XP and Vista.

If you have any question, feel free to ask, would be glad to help.