公开(公告)号：US09502062B1

公开(公告)日：2016-11-22

申请号：US14928668

申请日：2015-10-30

Applicant: Seagate Technology LLC

Inventor： Andrei Dorobantu ,  Thomas C. Zirps ,  Tim Rausch

IPC: G11B5/596 ,  G11B5/00

CPC classification number: G11B5/59627 ,  G11B2005/0021

Abstract: First and second repeatable runout (ZAP) values are both located on a first virtual track of a magnetic disk. The first ZAP value is offset from the first virtual track center in a first direction and the second ZAP value is offset from the first virtual track center in a second direction opposite the first direction. At least one of the first and second ZAP values are accessed when performing repeatable runout correction for a writer of the read/write head that is being positioned over a second virtual track of the magnetic disk.

Abstract translation: 第一和第二可重复跳动（ZAP）值均位于磁盘的第一虚拟轨道上。 第一ZAP值在第一方向上偏离第一虚拟轨道中心，并且第二ZAP值在与第一方向相反的第二方向上偏离第一虚拟轨道中心。 当对位于磁盘的第二虚拟轨道上的读/写头的写入器执行可重复的跳动校正时，访问第一和第二ZAP值中的至少一个。

公开(公告)号：US09178531B1

公开(公告)日：2015-11-03

申请号：US13869191

申请日：2013-04-24

Applicant: Seagate Technology LLC

Inventor： Mustafa Can Ozturk ,  Puskal Prasad Pokharel ,  Barmeshwar Vikramaditya ,  Thomas C. Zirps

IPC: H03M13/00 ,  H03M13/05 ,  H03M13/09

CPC classification number: H03M13/05 ,  H03M7/16 ,  H03M13/09

Abstract: The disclosure is related to systems and methods for achieving improved servo Gray code error detection and correction. A device may include a circuit configured to read servo data that is encoded using a Gray code encoding scheme to produce servo Gray code, read one or more Check bits associated with the servo Gray code, determine whether a read or write head is positioned over a target data track based on the servo Gray code and the one or more Check bits, and execute a read or write operation when the read or write head is positioned over the target data track.

Abstract translation: 本公开涉及用于实现改进的伺服格雷码错误检测和校正的系统和方法。 设备可以包括被配置为读取使用格雷码编码方案编码以产生伺服格雷码的伺服数据的电路，读取与伺服格雷码相关联的一个或多个检查位，确定读或写头是否位于 基于伺服格雷码和一个或多个检查位的目标数据轨迹，并且当读或写头位于目标数据轨道上方时执行读或写操作。