I've had my 15" 2.4 uni for just about a month now, and put the 7200.4 into it new when it arrived. Today it started locking up, spinning beach ball and all, so I ran the extended hardware test and got this error: 4HDD/11/40000004:SATA(0,0) UGH - so I go into Disk Utility, and it says SMART Verify. But friendly Google says that error means the drive is failing, so I download Smart Utility from Apple downloads, and sure enough, it also says "Failing". I've got 6 bad sectors, and 224 total errors, mostly Uncorrectable Error - READ DMA EXT. Now I've got to make sure my backup is good. So annoyed.