There's plenty of old wives tales and misinformation to plunder from this
thread although there is some wisdom as well.
First of all, what do you want to do with the sata drive. Is it to become
your booter?
If the sata is to be your new booter, try the copying software from the
manufacturer or use Ghost to clone the drive. Then as another has suggested,
set the boot order in the bios to boot from the sata first and you are done.
Then you can reformat the existing ide drive or whatever you want to do with
it.
If you just want to add the sata as another drive, then do just that and
leave your boot order as HDD0 or whatever.
Do not be mislead by the "experts" who claim otherwise.
FWIW, I have 2 machines running with both sata and ide drives and yes the
onboard ide is considered by the motherboard to be the "Main" or "First" set
of boot devices, but by adjusting the bios to boot from sata first, all is
just fine and dandy.
Regards, Bob "hopelessly insane machine warrior" Troll