首页>
外国专利>
Magnetic recording disk and disk drive with amplitude-type servo fields having patterned servo islands for read/write head positioning
Magnetic recording disk and disk drive with amplitude-type servo fields having patterned servo islands for read/write head positioning
展开▼
机译:带有振幅型伺服场的磁记录磁盘和磁盘驱动器,具有用于读/写磁头定位的图案化伺服岛
展开▼
页面导航
摘要
著录项
相似文献
摘要
A magnetic recording disk drive has a disk with pre-patterned nondata servo sectors extending generally radially across the data tracks. The disk may be a patterned-media disk with both pre-patterned data islands and pre-patterned nondata servo sectors. The servo sectors include a synchronization pattern of generally radially directed discrete magnetized marks, and first and second position error signal (PES) fields of generally radially directed discrete magnetized stripes. Each stripe in each of the two fields comprises a plurality of radially spaced discrete servo islands, each island having a radial height of approximately Tp, where Tp is the radial spacing of the track centerlines. In each field, the servo islands in alternating stripes in the along-the-track direction are shifted radially by approximately Tp. In the first PES field, the islands are centered at the midline between two adjacent track centerlines, and in the second PES field the islands are centered at a track centerline. All of the servo islands in the two PES fields have the same magnetization direction.
展开▼