Patent ID: 6728054
Filing Date: 2004-04-27
Classification: G11B

Abstract:
In a disc drive having a data disc with a top surface and a bottom surface for recording data, each of the surfaces comprising a plurality of zones each having a plurality of tracks, the disc drive having a first head positioned adjacent the top surface and a second head positioned adjacent the bottom surface for reading and writing data from and to the tracks on the data disc, a method of adapting a switching sequence to the disc drive comprising steps of:(a) selecting a zone on one of the surfaces of the data disc; (b) measuring a head switch time duration representing the time it takes for the first head at a first track to switch to the second head at a second track within the selected zone; (c) measuring a track switch time duration representing the time it takes for the first head to perform a track seek operation from the first track to the second track within the selected zone; (d) comparing the track switch time duration to the head switch time duration; and (e) if the track switch time duration is greater than the head switch time duration, utilizing head switching for subsequent operation within the selected zone; otherwise utilizing track switching in the selected zone.