I have a Seagate Barracuda 7200.12 1 TB hard drive in my build. As soon as I boot my computer, the hard drive spins up for a couple seconds, shuts down, spins up again for a few seconds, shuts down, etc. In the past couple days I've been hooking up old IDE hard drives to pull files off of them, but I disconnected the Barracuda before I did anything else. My system specs:
mobo: Asus M4A87TD/USB3
CPU: AMD Phenom II X4 955
GPU: ATI Radeon HD 5670
RAM: G. Skill Ripjaws X Series 4 GB (2x2 GB) @ 1333 MHz
PSU: Azza Dynamo 500W
CD/DVD: Asus DRW-24B3ST
Seagate Barracuda 7200.12 1 TB
I built this computer almost a year ago, and I haven't changed how I use it at all. Nothing is overclocked at the moment. Any help on this would be greatly appreciated.
It could also be your computer.
Try connecting it with different cables, or even better another computer.
I tried it in another computer and it couldn't boot into either operating system (Windows XP or Linux Mint 13), but then I put it back in my normal computer and it booted just fine. I'm posting with it running seemingly fine right now.