Win 7, on SATA, boots.
Win XP, on IDE ,did boot when first installed, leaving XP disc in drive and not touching bios.
Removed XP disc.
Put Win 7 in drive to boot to Win 7. Remove Win 7 from drive.
Set bios sequence to boot to Win XP. Boots to Win 7.
Tried to disable Win 7 in bios. Boots to Win 7.
How do I get the boot sequence to boot to the drive I want?
You need to pick one of the drives as the boot drive, and the other one as secondary. The ide drive has a jumper you can change. For the sata, I use the hardrive software from the manufacturer's website. For my hardrives, "maxblast 5" works with maxtor and seagate drives, and possibly other brands. The software will set up the sata as the boot or secondary drive. It may require you to format one of the drives to make it to work. There is a special sequence to set up an xp drive for windows 7 so you won't lose your files, but I've never tried it, and don't have a link. Do a search. It's listed on microsoft's website.