+ 0 Votes You need SATA drivers ... OldER Mycroft 4 years ago Which you'll find by looking on the manufacturer's website, of whichever motherboard/chipset you are using. You may have to specify the make of the SATA drive(s) too. XP didn't install with default SATA drivers, having been developed before SATA hard disk drives had been born. + 0 Votes Well... Mohammad Oweis 4 years ago I did not notice that you are trying to add the SATA drive as an additional one, and windows is installed on the IDE drive. Anyway, Windows-XP can not see SATA drive that run on native mode or with ACHI enabled from BIOS. If its already enabled, disable it, then go to Computer Management -> Disk Management -> Right click -> Rescan disks. Theoretically this should work + 0 Votes BIOS Mohammad Oweis 4 years ago Find in the BIOS configuration an option regarding SATA Native Mode, or anything related to SATA operation (name is different for each BIOS vendor) then disable it, or change it to the other value. After that try to install Win-XP, now it should see the drive.