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    • 5. 发明公开
    • Servo defect management scheme in hard disk drives
    • 系统管理委员会(Plattenlaufwerks)
    • EP1211683A2
    • 2002-06-05
    • EP01122127.2
    • 2001-09-14
    • SAMSUNG ELECTRONICS CO., LTD.
    • Chu, Sang-hoonShim, Jun-seokYu, Seong-hwanChoi, Soo-IlLee, Kang-seok
    • G11B21/10
    • G11B5/59633G11B5/59688G11B27/3027
    • The present disclosure relates to a system for detecting a plurality of defect types on the surface of a disk in a hard disk drive. In particular, the disclosure relates to utilizing information obtained from a plurality of servo bits to determine if a sector contains a physical defect. Where such a defect is found, the sector's write gate is disabled and its burst signal data is ignored for track following purposes. In addition, large changes in PES are used to identify closure spike defects. Such defects are managed by providing a compensation signal to the read value of the PES to improve track following. Finally, high PES values are used to signal a third defect type where no other signs of defect are present. In such case, the sector is mapped as defective, but the burst signals continue to be used for track following purposes.
    • 本公开涉及一种用于检测硬盘驱动器中的盘表面上的多种缺陷类型的系统。 具体地,本公开涉及利用从多个伺服位获得的信息来确定扇区是否包含物理缺陷。 在找到这样的缺陷的情况下,扇区的写入门被禁用,并且其突发信号数据被忽略以用于跟踪目的。 此外,PES的大变化用于识别闭合尖峰缺陷。 通过向PES的读取值提供补偿信号以改善跟踪跟踪,来管理这些缺陷。 最后,使用高PES值来表示不存在其它缺陷迹象的第三缺陷类型。 在这种情况下,扇区被映射为有缺陷的,但突发信号继续用于追踪目的。