Can somebody please fill me in on what "Bad Clusters" are? I have an external hard drive that has bad clusters on it. I have tried about everything I could think of to recover them, ran programs, re-formated the drive pulled the partition out and re-loaded everything and it still reads bad clusters are in there. I don't know why. It's an older Maxtor 120 GB drive and for the most part, I thought the drive was failing when it turned out to be that the power supply plug and the usb plugs were not securely seated. Right now the drive only has about 4 kb of bad clusters, it used to have more.