Results 271 to 280 of about 162,355 (348)

Optimization of track seeking pulse waveform in hard disk drives

Digest of the Asia-Pacific Magnetic Recording Conference, 2003
Track access time is an important parameter for high performance hard disk drives (HDDs). Presently, the resonances of the head actuator assembly (HAA) caused by the pivot stiffness and mass of the HAA are becoming an even more urgent problem, since these resonances have become the main design factor which limits further reduction of track access time ...
null Sheng Zeng, null Limei Xu, null Rongming Lin, null Ningqun Guo   +3 more
openaire   +1 more source

Hard Disk Drives Failure Detection Using A Dynamic Tracking Method

2019 IEEE 17th International Conference on Industrial Informatics (INDIN), 2019
Hard disk drives (HDDs) are the core components of data center in IT companies. A breakdown of HDD may cause horrible data loss and great economic loss. Therefore, failure prediction for HDDs is significant to avoid loss and make a data backup plan in advance. Existing prediction methods always focus on a fixed threshold to distinguish whether a HDD is
Yu Wang, Shan Jiang, Long He, Yizhen Peng, Tommy WS Chow   +4 more
openaire   +1 more source

The effect of disk platter resonances on track misregistration in 3.5 inch disk drives

IEEE Transactions on Magnetics, 1996
With the increase in track density and higher rotation speeds in hard disk drives, effects contributing to track misregistration (TMR) that heretofore have been negligible in the 3.5 inch form factor are now quite significant. One effect is the vibration of the individual disk platters at their natural frequencies. These resonances are driven primarily
openaire   +1 more source

Optimal track-width design of AMR/GMR heads for high-track-density disk drives

IEEE Transactions on Magnetics, 1998
The optimization of the write and read track-widths based on the new concept of a soft error rate (SER) contour map is proposed. In the calculation of the SER, the side fringe erase bands, microtrack MR sensitivity profile, and mechanical positioning accuracy are taken into account. From the SER map, nominal write and read track-widths can be optimized
F. Tomiyama, H. Ide, T. Hamaguchi, H. Takano, T. Yamaguchi, N. Kodama   +5 more
openaire   +1 more source

The ultra high track density head positioning method of disk drives

IEEE Transactions on Magnetics, 1996
Recently, ultra high track density positioning methods have been studied as key technology to increase the capacity of disk drives. This paper introduces a new method, Graphic Head Positioning method (GHP), and compares it with other methods.
null Jiangling Zhang, null Zikun Wan, null Wei Zhang, null Zhengwen Xiao   +3 more
openaire   +1 more source

Ball Bearing Design Influences on Disk Drive Track Misregistration

Advances in Information Storage and Processing Systems, 1995
Abstract Linear actuator bearings using ball rollers must be optimized for Track Misregistration (TMR). They must not be so compliant as to contribute to nonlinearities in the drive’s servo system and not be so tight that they cause wear.
openaire   +1 more source

Relieving the burden of track switch in modern hard disk drives

Multimedia Systems, 2010
In this work, we propose a novel hard disk technique, "AV Disk", for modern multimedia applications. Modern hard disk drives adopt complex sector layout mechanisms to reduce track and head switch overhead. While these complex sector layout mechanism can reduce average overhead involved in the track and head switch, they bring larger variability in the ...
Jongmin Gim, Youjip Won
openaire   +1 more source

Investigation for Mechanism of Far Track Interference in Hard Disk Drives

IEEE Transactions on Magnetics, 2015
In hard disk drives (HDDs) using perpendicular magnetic recording, an adjacent track interference (ATI) is a major barrier to increasing areal density because both strong writing and narrow track pitch are required. Recent head/disk combinations have exhibited not only ATI, but also a phenomenon we call far track interference (FTI).
Masayoshi Shimokoshi, null Wen-Chien Hsiao, Ahmet Kaya, null Yansheng Luo, Nelson Cheng, Lakshmi Ramamoorthy, David Jen, Kris Schouterden   +7 more
openaire   +1 more source

Simulation of Radial Tracking Error Signals on Optical Disk Drives

Topical Meeting on Optical Data Storage, 1985
Optical disk drives require a radial tracking error signal to control a radial actuator. This actuator is used to follow track runout introduced by respindling the media platter and nonrepeatable spindle runout. The error signal can be optically derived by a variety of methods.1 This paper represents a method of simulating the radial error signal ...
openaire   +1 more source

Improved track following in magnetic disk drives using a disturbance observer

IEEE/ASME Transactions on Mechatronics, 2000
Improving the position control of the disk drive read/write heads is an important step in increasing the storage capacity of a drive, especially in the presence of internal and external disturbances. To address this problem, the typical feedback loop of a disk drive servo system was augmented with a disturbance observer.
M.T. White, M. Tomizuka, C. Smith
openaire   +1 more source