Excerpt: Not wanting to throw away my old Mac Power PC I was looking for a cheap drive to keep it running. This worked great. After reformatting and instaling operational softwre my Power PC runs like a champ.
Summary: The only way I can fault the barracuda is noise levels, when you're booting something up on this drive the moving mechanical parts will create noise. Maybe more so than it's rivals, but the great thing is, it is an affordable 7200 RPM HDD that is reliable. If you can pay a premium for a Western Digital Black, then that should be considered too, but for the price these Barracudas are unbeatable.
Summary: I purchased this to replace my wife's failing HD. No problems with the install or the operation of this HD. For the price this was the best HD I could find. I would recommend this to anyone who needs or wants a new HD.