Hey guys, I just purchased 2 1TB Barracudas and upon installing them (bays 3 and 4) I noticed a faint but definitely audible (and aggravating) humming noise that comes in a cycle of about 5 seconds. It sounds identical to this video (made by someone else, but with the same drive) but my cycle is a bit longer: http://www.youtube.com/watch?v=HgXmVqSKxKw I'm wondering if this is an issue with the drives or my installation? I mounted them tightly. I tried staggering the new drives with my old drives in terms of bay order to no avail. Has anyone experienced this? The price on these drives is killer ($129) but I'll be returning them soon if I can't kill this noise. Thanks, Alex ---------------------------- mac pro. 2 x 2.66GHZ Dual-Core Intel Xeon. 2GB 667MHZ DDR2 FB-DIMM.