|If the SATA controller was on RAID 1, use that:|
In RAID 1 (mirroring without parity or striping), data is written identically to multiple disks (a "mirrored set"). While any number of disks may be used, many implementations deal with only 2.
Now this bit of information raises new questions. RAID 1 basically says there are at least **two** hard drives in the system. Can you verify that there are 1 or 2 hard drives in this system? The system BIOS will list them as it's booting. The pause key may come in handy. Press and the scrolling stops. Might have to do it a time or two to get where you want to be as it goes by pretty fast. Any key continues the scroll.
If you see a message "RAID HEALTHY" or similar, you may have at least 2 hard drives.
This also raises the question if someone has been in the CMOS changing settings and that is the problem. If so, there should be an option to reset the CMOS (BIOS) to factory or default settings. Do this ** ONLY IF ** you have only one hard drive in the system.
Be sure to write down the ALL settings before you reset so they can be restored if necessary.
The hard drive setting in newer systems is SATA Native or IDE for solo drives. If it boots with either of these settings and gets an error, try the other. Tell us about your PC - make and model - will help with the CMOS setup.
Still need a boot disk. Can you create one from the system you are currently using?
Does the sytem you are on now boot with the restore DVD from the non working system? We are testing the disc to be good or bad.