BIOS does not recognize hard disks

I recently built a new computer. I have a Gigabyte X58USB3.0 motherboard with four SATA devices connected to it; three hard drives and one dvd-rom drive.

BIOS recognizes one hard drive and the dvd drive but it does not recognize the other two hard drives. One hard drive is a Seagate LP 2TB, which I have heard frequently arrives DOA. This is the first time I have used it so I have no confirmation that it is a good drive. It's receiving power and I can tell that it is running, however BIOS does not recognize it. The other hard drive is from my old computer and it is an IDE drive with an IDE/SATA adapter. It's possible that the adapter doesn't work and that's why BIOS does not recognize it.

I have tried reinstalling the chipset driver, running disk management in Windows 7, going through the BIOS but I can never find these two drives. Any ideas?

Reply 1 : BIOS does not recognize hard disks

and make sure the jumpers are set properly on the IDE drive. You should use an 80 conductor cable and the cable select option for the jumper. Some MB ports that are designed for optional RAID use can cause the issue you see as these will be an"either/or"
configuration. This means you use either SATA or IDE but cannot use both at the same time.