用HDD Regenerator Shell修复硬盘坏道

硬盘坏道(特别是物理坏道)是硬盘的所有故障中最让人头痛的。采用低格或隐藏的方法会对硬盘的寿命造成一定影响;用HDDRegeneratorShell(以下简称为HDD)软件可以轻松修复硬盘坏道。本文从制作启动盘、扫描坏道、修复坏道等几个方面详细介绍了HDDRegeneratorShell软件的使用方法,希望能给读者提供一点借鉴。     

哪些原因能导致硬盘产生坏道

硬盘坏道分为逻辑坏道和物理坏道。硬盘的逻辑坏道产生的原因通常是由于软件的使用或操作不当,如经常不正常关机（当然频繁的不正常关机可能也会引致物理坏道）所造成的。硬盘的逻辑坏道属于软坏道,并不是真正的物理损坏,但若不及时修复则会导致坏道区域蔓延,从而造成更多数据丢失或程序出错。     

“摆平”硬盘中的坏道

硬盘比较脆弱,如果使用不当就会产生坏道,这是硬盘报废的前奏,应提前对重要数据进行备份。小贴士硬盘坏道分“逻辑坏道”和“物理坏道”两种。前者一般可用软件修复;后者表示硬盘磁道产生了物理损伤,是不可修复的。硬盘有坏道,一般表现为:在打开、运行文件时,硬盘速度明显变慢;     

遇到坏道你别怕——利用多种软件修复硬盘坏道

硬盘出现坏道确实令人头痛，但是并非“无可救药”。其实在一些硬盘修复软件的帮助下，成功修复硬盘坏道是完全可能的。     

硬盘常见故障有哪些?

硬盘常见故障主要有硬盘坏道和零磁道故障等。其中硬盘坏道又分为逻辑坏道和物理坏道两种,前者为软坏道,通常为软件操作或使用不当造成的,可用软件修复;后者为真正的物理性坏道,它表明你的硬盘磁道上产生了物理损伤,只能通过更改硬盘分区或扇区的使用情况来解决。下面具体分析一下。1.逻辑坏道:就是“软坏道”,是由软件安装或使用错误造成的,一般对硬盘本身不会造成太大的危害。2.物理坏道:由于磁头和磁盘间的间隙仅有0.015～0.025微米,间隙非常小,硬盘在运输途中如果受到强烈颠簸,就可能使硬盘产生物理坏道。除此以外,人为的碰撞也会使一块…     

对《取其精华 弃其糟粕—硬盘坏道的解决实例》的补遗

2002年第2期的文章《取其精华 弃其糟粕——硬盘坏道的解决实例》介绍了屏蔽硬盘坏道的方法,因为本人也多次进行过有坏道硬盘的修复,所以想对《取》文做几点补充。 《取》文查找坏道位置的方法是:格式化硬盘,当出现坏     

中职计算机教学中硬盘修复技术实践

在中职计算机教学中,合理选择硬盘修复技术,使学生学得懂修得好是有意义的。通过对HDD Regenerator 1.51硬盘修复软件的解读,详细介绍了该软件在中职计算机教学中的实践过程。     

如何保养和修复电脑硬盘

本文从电脑硬盘的外部环境保护和内部扇区的维护两个方面具体说明了如何保养和修复电脑硬盘。特别针对硬盘坏道的逻辑坏道和物理坏道分别作了介绍，并同时介绍了屏蔽硬盘坏道的工具软件。     

如何保养和修复电脑硬盘

本文从电脑硬盘的外部环境保护和内部扇区的维护两个方面具体说明了如何保养和修复电脑硬盘。特别针对硬盘坏道的逻辑坏道和物理坏道分别作了介绍,并同时介绍了屏蔽硬盘坏道的工具软件。     

PC门诊

IBM 硬盘坏道修复问:我的 IBM 硬盘近来的读盘声音越来越响(是那种格格声又有点像吱吱声,用了才一年),但我用 IBM 的Smardefender 检测却说是健康的,找到销售商要求更换,但他说没有坏道(拿回来后我自己用 Scandisk 检测也真的没有坏道),这是怎么回事啊?(本刊读者)答:IBM 除了提供 Smardefender 检测软件外还提供了一款叫做 DFT 的软件,这款软件的功能极为强大,不但能够检查硬盘的坏道,还能预测硬盘的寿命和修复带有坏道的硬盘(JS 常用此软件搪塞大家的坏 IBM 硬盘,因为用它修复的硬盘在一定时间内用起来像新的,其它检测软件根本测不出来),你可以下载来试试。还有 IBM 的硬盘前一段质量问题比较突出,如果     

Dual track Wallace fly height measurement method to monitor slider motion in 2 dimension at near contact regime

Head media spacing of hard disk drive (HDD) is expected to continue its reduction in order to support areal density growth. At sub-nm clearance between the head and the disk, the intermittent head disk contact and interactions may happen. This does not only cause the fly height modulation but also induces the off-track motions as well. It is desirable to understand the characteristics of the 2D motions in the near contact regime, so as to enable further reduction of the clearance and to improve the reliability of HDD. This paper presents a method to measure instantaneous fly height (FH) motion and cross track motion concurrently by using read back signal from the dual data tracks written at different frequencies. The method is able to separate the FH motion and cross track motion of the head.     

硬盘伺服刻写的新方法

本文提出了一种新的硬磁盘伺服刻写方法--螺旋伺服刻写法,推导了螺旋伺服运动模型,并做了性能分析。该方法首先将伺服初始信息以螺旋道的方式写入盘片,然后在后期由硬磁盘驱动器（HDD）自行将伺服信息补充完整,在保证伺服信息完整性的同时减少了关键资源的使用时间,缩短了伺服刻写时长,提高了生产效率,降低了生产成本。     

计算机硬盘坏磁道修复的思路与技巧

本文通过隐藏坏磁道分区的方法,着重介绍了硬盘坏磁道的修复技术及注意事项,同时还介绍了逻辑坏磁道、0磁道损坏的修复方法。     

一种抑制硬盘自伺服刻写中径向误差传播的方法

磁头和数据道的相对位置是通过分析伺服信息得到的.因此伺服信息必须在硬盘生产过程中被写入.传统的伺服信息刻写过程需要借助伺服道刻写机和净房环境,这些都会使硬盘的生产成本增加.快速增长的磁道密度也给伺服信息的刻写带来很大压力.自伺服刻写能够使用硬盘自身的组件来完成伺服信息的刻写过程,因此提高硬盘的生产效率.讨论了硬盘自伺服刻写过程和其中的关键问题,分析了自伺服刻写原理及其带来的径向误差传递现象.径向误差是由于噪音扰动、"种子"磁道的缺陷和与上一磁道的高度依存性引起的.比较了现行的两种抑制自伺服刻写中误差传播的办法,分析了它们存在的问题,然后提出了一种加权型校正信号的产生方法,并从理论上和仿真条件下证明了该方法的正确性和优越性,它能同时减少磁道绝对径向误差和相对径向误差.     

Evolutionary design and implementation of a hard disk drive servo control system

The ever increasing demand for higher storage capacity and smaller magnetic hard disk drives have driven the need of developing a high performance head positioning servo control system. To meet the challenge, this paper presents the design and real-time implementation of a robust two-degree-of-freedom servo system for physical 3.5-in. hard disk drive with single voice-coil-motor actuator using a multi-objective evolutionary algorithm toolbox. Besides the simplicity in controller structure, such an evolutionary servo control system is capable of meeting various performance specifications of hard disk drives in both the time and frequency domains. It is shown that the servo system optimally moves the magnetic head onto the desired track with minimal control effort, and keeps it on the track robustly against plant uncertainties or runout disturbances. Validation results of the evolutionary servo control system are compared with classical PID and RPT controllers, which show excellent closed-loop response and robustness in the face of practical perturbations in HDD.     

Transient dynamic analysis of ferro-fluid bearing spindle motor

 With areal recording density of hard disk drives (HDD) historically growing at an average of 60% per year and fast spindle speed to continue to reduce access time, it is becoming increasingly more difficult to maintain the precise positioning required of the GMR heads to read and write data. Any unexpected vibration will cause the data written to a wrong data track. Consequently, the dynamic behaviors of HDD spindle systems and their potential influences on track misregistration are key issues in disk drive design. With rapid advances in the emerging consumer device market, the fluid bearing spindle motors, which have low NRRO, low acoustic noise and high damping, are being developed as next generation spindles. This paper is to study transient dynamic performance of HDD ferro-fluid bearing spindle systems. The FEA based component mode synthesis method is used to reduce the overall spindle system dimensions. The effect of the unbalanced magnetic pulls (UMP) due to two different types of motor configurations (balanced and unbalanced configurations) on the dynamic behaviors of spindle system was investigated. The simulated results show that the motor with balanced configuration provides better spindle dynamic performance due to absence of UMP. The UMP derived from the unbalanced configuration can result in some frequency resonance interactions and adversely affect the HDD servo-tracking system. Received: 5 July 2001/Accepted: 17 October 2001     

Hinge pivot for disk drive

This paper discusses the findings of a hinge pivot for use in hard disk drives (HDD). The actuator assembly in a HDD is supported by a pivot cartridge and controlled by a servo system to perform seek and track following operations for data recording. The cartridge is composed of a pair of pre-loaded ball bearings. Due to the demand for thin hard disk drives and hence, the need to reduce the height of the actuator assembly, a hinge pivot is proposed to replace the set of bearings. The shaft of the pivot is connected to the sleeve with thin hinges made of ultra-high heat-resistant polyamide film, such as Upilex. Measurement showed that the hinge pivot did not exhibit the nonlinear effects during low frequency actuation, such was inherent for ball bearing pivots. Experiment also showed that at least a million life cycles can be achieved without any performance degradation.     

Whirling, tilting and axial motions of a HDD spindle system due to the manufacturing errors of FDBs

This paper investigates the whirling, tilting and axial motions of a hard disk drive (HDD) spindle system due to manufacturing errors of fluid dynamic bearings (FDBs). HDD spindle whirls around the sleeve with tilting angle due to the centrifugal force of unbalanced mass and the gyroscopic moment of rotating spindle in addition to axial motion. The whirling, tilting and axial motions may be increased by the manufacturing errors of FDBs such as imperfect cylindricity of sleeve bore, or imperfect perpendicularity between shaft and thrust plate. They increase the disk run-out to limit memory capacity and they may result in the instability of the HDD spindle system. This paper proposes the modified Reynolds equations for the coupled journal and thrust FDBs to include the variable film thickness due to the cylindricity of sleeve bore and the perpendicularity between shaft and thrust plate. Finite element method is used to solve the modified Reynolds equation to calculate the pressure distribution. Reaction forces and friction torque are obtained by integrating the pressure and shear stress, respectively. The whirling, tilting and axial motions of the HDD spindle system are determined by solving the equations of a motion of a HDD spindle system in six degrees of freedom with the Runge-Kutta method. It shows that the imperfect cylindricity and perpendicularity increase the whirl radius, axial runout and tilting angle of the HDD spindle system. However, the degradation of dynamic performance due to the imperfect perpendicularity between shaft and thrust plate can be improved by allowing the other manufacturing error of the cylindricity of sleeve bore in such a way to compensate the bad effect of the imperfect perpendicularity.     

Dynamics simulation of MEMS device embedded hard disk drive systems

Currently, hard disk drives (HDD) use rotating disks to store digital data and magnetic recording heads are flying on the disk to read/write data. The recording heads are mounted on a slider–suspension assembly, which makes heads move from one track to another on the disk. The heads movement is controlled by close-loop feedback servo systems. It is well known that dynamic behaviors of head–slider–suspension-assembly (HSA) systems are of great influence on the track per inch capacity of HDD [1, 2]. As the problem is structurally complex, it is usually investigated using experimental methods or finite element simulation models [3]. Furthermore, the dual-stage servo system has been commonly considered as one promising solution to increase the servo bandwidth of the recording positioning system for high TPI HDDS. In particular, MEMS device embedded systems are superior to others in batch-fabrication. However, this dual-stage system has also resulted in more difficulties in predicting HDD dynamic performance. This paper presents the study of the problem using the macromodeling simulation approach. It applies efficient FEM based sub-structuring syntheses (SSS) [4] and fast boundary element method (BEM) approaches incorporated with system dynamics technology to investigate the dynamic characteristics of MEMS actuator embedded HSA systems for HDD.This research is funded by the Agency for Science, Technology and Research of Singapore, Strategic Research Program. Also, the authors would like to thanks Miss Jia Wenhui, who is a Research Student with ECE Department at National University of Singapore, Mr. Lim Boon Buan, the former research engineer with Data Storage Institute, for the MEMS actuator modeling and analytical work.