iMac dual core 2 intel 2 gigs ram 1 lacie FW400 ext. drive 80gig 1 lacie USB 2.0 ext drive 500gig mac osx 10.4.11 after doing a recent update on my software, my 500gig ext. drive has been randomly accessing itself for no apparent reason. No bit torrent, no browser, no appications running. The drive is a little noisy to start with, but when I have NO APPLICATIONS running, it's a "lighter" access sound that is happening, but when I have my browser open, it has a tendancy to REALLY GRIND out some access as if I was running a movie, copying GIGS of info or other high demand. tried a repair, said it was okay. my firewall is on. tried a restart. tried YASU to clear everything. no dice. is the drive dying? can I have a virus?