A contact start/stop architecture for disk drives overcomes problems introduced by low flying MR (magnets resistive) heads and textured landing zones. Takeoff velocity for heads vary from the textured landing zone to the data zone. Contact start/stop operations are controlled relative to a critical takeoff...http://www.google.com.hk/patents/US6239935?utm_source=gb-gplus-share專利 US6239935 - Method and apparatus for starting a hard disk drive having separate landing and data zones
