I have 3 SATA hard disks connected in my pc's cabinet. However recently i noticed that there was some high frequency noise being emitted from the cabinet. I suspected that the was noise coming from one of my hdd so i tried connecting one hdd at a time and the noise stopped coming. The hdd which i have now removed is of 40 GB and contains a single partition with only some movies on it. Could this be a hardware problem or is it that watching movies directly from the hdd has hampered its life?