Be sure to check a couple of things on the re-install:
In the Bios setup menu, go to the Boot Area:
Boot Order:
CDRom - 1st
Floppy - 2nd
Hard Drive - 3rd (the one you want to boot from)
Hard Drive Priority Area:
Be sure the Hard Drive you are trying to install on is listed FIRST
Note: Make sure your Raid option is turned off in the Bios setup menu to make sure it is not looking for a raid drive.
Don't forget to save before you exit if you make any changes.
Please list your specs so we know what we are dealing with in the way of a motherboard and the type and brand name drive.