1. A method of detecting disk drive power-on-reset events, comprising: reading from a disk drive an initial power cycle count attribute of the disk drive, and storing the initial power cycle count attribute in memory; detecting an event which indicates that the disk drive may have undergone a power-on-reset event; and in response to detecting the event, reading a current power cycle count attribute of the disk drive, and comparing the current power cycle count attribute to the initial power cycle count attribute to evaluate whether the detected event was caused by a power-on-reset event.