Transducer head skew arrangement for disk drive system
October 2, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3838457 Measurement of disc servo head/data head misalignment Head positioning mechanism for rotating disk data storage system Head position control system with multiple servo areas staggered on various disks Head position control system Servo pattern writing method for a disk storage device High-radix divider Track access control system for magnetic disk system with periodic track offset update Patent #: 5109306 InventorsApplicationNo. 591910 filed on 10/02/1990US Classes:360/78.14, By recorded servo reference or address signal360/77.05, By servo signal component from carrier surface separate from information signal bearing surface360/77.07, By tracking signal recorded on or immediately beneath surface360/77.11Continuous servo signalExaminersPrimary: Psitos, Aristotelis M.Assistant: Sheladia, Varsha V. Attorney, Agent or FirmForeign Patent References
International ClassesG11B 005/596G11B 005/584 AbstractA transducer head skew arrangement used in a multiple disk drive data storage system is provided. The disk drive unit includes a plurality of magnetic disk surfaces mounted for simultaneous rotation about an axis. A first sequence of servo information tracks are arrayed on a dedicated servo disk surface. At least one servo reference track is written on each data disk surface for storing servo reference information. The servo reference track is written on a first data disk surface aligned with a predefined servo information track on the dedicated servo disk surface. Then servo reference tracks are sequentially written on each successive consecutive data disk surface progressively offset radially from the last written servo reference track. A plurality of data information tracks for storing data are disposed at predetermined positions relative to the servo reference track on each the data disk surface. A servo transducer head is mounted for movement in a radial direction across the first dedicated servo information for reading servo information; and a plurality of data transducer heads are mounted for movement with the servo transducer head in a radial direction across the disk surfaces for reading the servo reference tracks and for reading and/or writing data to the data information tracks. The distance moved by transducer heads for a cylinder switch is the same distance moved for each head switch, so that track-to-track seek time is minimized without requiring any additional time delay for each head switch. An overall data transfer rate increases for every data transfer accessing more than one data cylinder.Other References
Field of SearchBy recorded servo reference or address signalControlling the head By memory storage of repeatable error or correction By servo signal component from carrier surface separate from information signal bearing surface By tracking signal recorded on or immediately beneath surface Continuous servo signal For rotary carrier (e.g., disc) Locating specific areas Responsive to recorded address Plural disks | |
