Hey there I have a uMBP 17" w/ the standard 500GB 5400rpm drive and I'm getting beachballing probably around every three or four minutes or so. The problem has gradually gotten worse and worse. Thing is....this is the 3rd replacement machine that i've had. Two of the others have had failed hard drives and one had another unrelated problem. Does this sound like another hard drive failure? Why is apple using such unreliable drives in their machines? I' seriously not mistreating my computer in any which way, I let it rest on the table for a few minutes when I sleep it while it is writing the contents of the memory to the hard drive. Honestly, I am really starting to get sick of failing drives and cannot afford the downtime... Any help would be appreciated. Thank you!