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1. 发明授权

US06636049B1 Disc drive power-up process including head mapping 失效
标题翻译：光盘驱动器启动过程包括头映射
公开(公告)号：US06636049B1
公开(公告)日：2003-10-21
申请号：US09553076
申请日：2000-04-20
申请人： Teck Khoon Lim , Swee Kieong Choo , Kok Hoe Chia , Song Wee Teo
发明人： Teck Khoon Lim , Swee Kieong Choo , Kok Hoe Chia , Song Wee Teo
IPC分类号： G01R3102
CPC分类号： G11B19/00 , G11B5/012 , G11B5/455 , G11B27/36 , G11B2005/0018 , G11B2220/20
摘要： A logical-to-physical head map is built upon each power up of a disc drive. After powering the controller and disc drive spindle motor, a bias current is iteratively supplied to the read heads in succession. A representation of the voltage across each read head is stored in a fault register for comparison to a threshold and a “good” or “bad” fault status is stored for each head. A logical-to-physical head map is defined based on the number of logical heads, which in turn is based on the disc drive serial number. Each of the logical heads in the logical-to-physical head map is associated to a respective one of the heads having a “good” fault status to construct the logical-to-physical head map in the controller memory.
摘要翻译：每个磁盘驱动器上电后，建立逻辑到物理磁头映射。在给控制器和磁盘驱动器主轴电机供电之后，将偏置电流依次迭代地提供给读取头。每个读取头上的电压的表示被存储在故障寄存器中用于与阈值进行比较，并且为每个头部存储“良好”或“坏”故障状态。基于逻辑头的数量来定义逻辑到物理头映射，逻辑头依次是基于盘驱动器序列号。逻辑到物理头映射中的每个逻辑头与具有“良好”故障状态的相应头之一相关联，以构成控制器存储器中的逻辑到物理头映射。

2. 发明授权

US06188540B1 System, method, and device for a regenerative constant velocity park for voice coil motor 失效
标题翻译：音圈电机再生恒速驻车系统，方法及装置
公开(公告)号：US06188540B1
公开(公告)日：2001-02-13
申请号：US09107889
申请日：1998-06-30
申请人： Kah Liang Gan , Beng Wee Quak , Kok Hoe Chia , Chee Wai Lum
发明人： Kah Liang Gan , Beng Wee Quak , Kok Hoe Chia , Chee Wai Lum
IPC分类号： G11B5596
CPC分类号： G11B21/12 , G11B5/5547 , G11B5/596
摘要： A system, method, and device for moving a plurality of heads in a disk drive is disclosed. The system comprises hard disks, read/write heads for reading from or writing to the hard disks, a voice coil motor for moving the plurality of heads, a voice coil motor driver for energizing the voice coil motor, a voltage clamp device for regulating a voltage across the voice coil motor, and a park voltage source. The voltage clamp device comprises a transistor, a switch, and a resistive divider network. During head parking, a park voltage source activates the voltage clamp device, which clamps the voltage across the voice coil motor to a fixed value, resulting in movement of the voice coil and heads towards a park location with fixed velocity.
摘要翻译：公开了一种用于移动磁盘驱动器中的多个磁头的系统，方法和装置。该系统包括硬盘，用于读取或写入硬盘的读/写头，用于移动多个磁头的音圈电机，用于激励音圈电机的音圈电机驱动器，用于调节音圈电机的电压钳装置音圈电机两端的电压，以及驻波电压源。电压钳位装置包括晶体管，开关和电阻分压器网络。在停车期间，公园电压源激活电压钳位装置，其将音圈电动机上的电压钳位到固定值，导致音圈和头部以固定速度朝向公园位置移动。

3. 发明授权

US06446156B1 Proposal of capacity tuning in the production process of storage disc drives 有权
标题翻译：存储盘驱动器生产过程中的容量调整方案
公开(公告)号：US06446156B1
公开(公告)日：2002-09-03
申请号：US09475530
申请日：1999-12-30
申请人： Kok Hoe Chia , Teck Khoon Lim , Beng Wee Quak , Kok Seng Lim , Song Wee Teo
发明人： Kok Hoe Chia , Teck Khoon Lim , Beng Wee Quak , Kok Seng Lim , Song Wee Teo
IPC分类号： G06F1200
CPC分类号： G11B5/455 , G11B5/012 , G11B5/09 , G11B20/1816 , G11B27/36 , G11B2005/001 , G11B2220/20
摘要： A disc drive production process automatically configures the disc drive to a suitable capacity based upon the data transfer capability of each of the head/disc surface combinations in the drive. The error rate of each of the head/disc surface combinations is determined as a function of the bit density of the disc surface. Based on the data transfer capability of the head/disc surface combinations, one of three drive configuration schemes is selected. A variable BPI (bits per inch) scheme reduces the data rate of a weak head/disc surface combination while increasing the data rate of a strong head/disc surface combination. If the drive contains one very weak head/disc surface combination, a head depopulation scheme disables the very weak head. If the drive contains two or more very weak heads, a de-frequency scheme reduces the overall capacity of the drive.
摘要翻译：基于驱动器中的每个磁头/磁盘表面组合的数据传输能力，磁盘驱动器生产过程自动地将磁盘驱动器配置为合适的容量。根据盘表面的位密度确定每个头/盘表面组合的误差率。基于头/盘表面组合的数据传输能力，选择三种驱动器配置方案之一。可变BPI（每英寸位数）方案降低了弱磁头/磁盘表面组合的数据速率，同时增加了强磁头/磁盘表面组合的数据速率。如果驱动器包含一个非常弱的头/盘表面组合，则头部排泄方案会禁用非常弱的头部。如果驱动器包含两个或多个非常弱的磁头，则去频方案会降低驱动器的总体容量。

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