Patent ID: 7120806

Claim:
A disk drive for operating in a mobile device having a file system, comprising: means for receiving data transfer commands from the mobile device, each data transfer command being generated based on a request by an application and being accompanied by a code for an application category that is based on the requesting application; means for setting at least first and second operating mode transition time intervals for transitioning the disk drive after an end of a response to a data transfer command from a first operating mode that consumes a relatively high level of power to a second operating mode that consumes a relatively low level of power, the first time interval being less than the second time interval and being associated with a first application category and the second time interval being associated with a second application category; means for selecting a delay time interval to correspond to one of the transition time intervals based on the application category associated with a most recent data transfer command; and means for transitioning the disk drive from the first operating mode to the second operating mode based on the selected delay time interval.