The dual-stage servomechanism is proposed to support ultra-high track density in hard disk drives. Narrower track width will cause the seeking operation to occur within several tracks much frequently. Conventional seeking control methods may not achieve their optimal performance, because the actuator can not be boosted to the maximum speed in such a short-span distance. This paper proposes a new short-span seeking control scheme using two-degree-of-freedom configuration, which is composed of a dual-stage servo loop and two feed-forward control paths.
Did you find this white paper useful?
23 out of 50 users found this white paper useful
Related white papers
An Economic Approach to Networked Computing with Priority Classes
The operation of a networked computing system (NCS), such as Internet, can be viewed as a resource allocation problem, and can be analyzed using the techniques of mathematical economics. We...
Maximizing Oracle Performance — Bit-Mapped Indexing and Integrated Cached Disk Arrays
Large databases bring unique performance challenges, particularly in building indexes and optimizing query performance. This white paper discusses two new developments in achieving dramatically improved performance. The combination of the...
Guide for Data Protection
Choosing a storage management solution is more complex than ever. Backup and recovery applications are no longer enough. You need to stay on top of growing storage demands, while meeting...
EMC's AX100: A Zebra Changes Its Stripes
On May 27, 2004, EMC announced the newest member of the CLARiiON family of products, the AX100, broadening its target market to reach further into the SMB market, as well...
ALTANA Pharma Finds a Cure for Storage Problems With Comparex and IBM
ALTANA Pharma is a division of ALTANA AG, an international company with more than 10,000 employees, 30 subsidiaries and operations in Europe, North and South America, South Africa, Asia and...
HP StorageWorks Enterprise Virtual Array (EVA) Storage Solutions: High-Performance and Low-Cost Disk Drives
Reference data is growing at an exponential rate and until recently users did not have many options for placing their data on cost-effective media, with good performance, based on the...
Wide-Bandwidth Scanning Kerr Microscope for Measurement of Write Head Dynamics
The recent severe competition in hard disk drive (HDD) development has been conducted in two areas. One is the recording density, and the other is the data transfer rate. Although...
