I have noticed that at times, even when I am idle, the CD drive which has the Knoppix CD performs a series of quick start-stops, making a sort of clucking sound, with about 2 to 3 clucks per second. This is nothing like the sound of normal CD operation which starts with a constant and building whirring sound, etc. My clucking sound is almost like the sound of some hard drive operation, only louder of course. (I have knoppix on a plain old CD-R which I burned from an iso download). These clucking sounds happen during every session, but not very frequently, and at intervals whose logic escapes me. Am I hearing the sound of unsuccessful write attempts?