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Perpendicular Magnetic Recording Using Magneto-Optical Media
White Paper This paper explains that a high recording density can be achieved on a perpendicular magnetic recording medium with a TbFeCo film by controlling the magnetization reversal mode and improving the sputtering process. [03 Jul 2008]
Information Storage for the Broadband Network Era - Fujitsu's Challenge in Hard Disk Drive Technology
White Paper Commercial models of hard disk drives (HDDs) now have 18 million times the magnetic recording density of the world's first hard disk drive and are the only candidate solution for storing the bulk of the world's information stock. [03 Jul 2008]
Wide-Bandwidth Scanning Kerr Microscope for Measurement of Write Head Dynamics
White Paper One is the recording density, and the other is the data transfer rate. Although both areas are important in HDD technology, the latter needs an understanding of the magnetic behavior of the write/read head and the recording media in the high... [03 Jul 2008]
Synthetic Ferrimagnetic Media
White Paper The number of grains per bit has been approximately maintained to obtain the necessary signal-to-noise ratio (SNR) for adequate bit error rates at a specified areal density. This paper describes the microstructure, magnetic properties, thermal... [03 Jul 2008]
Technological Impact of Magnetic Hard Disk Drives on Storage Systems
White Paper A real density increases have exceeded the traditional semiconductor development trajectory and have yielded higher-capacity, higher-performance, and smaller-form-factor disk drives, enabling desktop and mobile computers to store multi-gigabytes... [25 Aug 2007]
Dual-Stage Servo Systems and Vibration Compensation in Computer Hard Disk Drives
White Paper This paper discusses two mechatronic innovations in magnetic hard disk drive servo systems, which may have to be deployed in the near future, in order to sustain the continuing 60% annual increase in storage density of these devices. [23 Aug 2007]
Capacity-Approaching Codes for the Magnetic Recording Channel
White Paper Digital signal processing and coding are increasingly being recognized as a cost-efficient approach in achieving substantial areal density gains while preserving the high reliability of disk drives, although historically advances in head and media... [12 Apr 2005]
iPod to go 80GB?
News Toshiba said the new technology allows it to achieve record storage density of about 16GB per square inch. Kazuyoshi Yamamori, vice president of Toshiba's storage device division, said in the statement: "Our research confirmed the superior... [15 Dec 2004]
Performance Media: Tweaking Magnetic Capabilities
White Paper Available throughout Seagate’s entire product line, oriented aluminum media has made it possible for Seagate to continually set areal density records and be first to market with both its desktop and enterprise hard disc drives, while still... [28 Apr 2004]
Optimum Pole Configuration of AC Induction Motors Used on Adjustable Frequency Power Supplies
White Paper The parameters which can be optimized via the correct choice of pole configuration include - torque density, speed range, efficiency, power factor, overload capability, and acoustic noise. For a "fixed frequency" (line powered) AC induction motor... [25 Feb 2004]
DDS-3 and DDS-2 DAT Tape Drives: DDS-3 DAT Tape Storage System
White Paper Seagate's DDS-3 drive includes several innovations, including the use of a PRML (partial response maximum likelihood) data channel that offers higher data density per inch, and a self-cleaning device inside the drive that reduces end-user... [25 Feb 2004]
Anisotropic Magnetoresistive and Giant Magnetoresistive Head Technology Taking Over Hard Drives
White Paper Error rate, the number of data bits correctly decoded by the recording head and fly height, the distance between the read/write elements of the head and the magnetic layer of the media are key design parameters in the quest for higher areal density. [25 Feb 2004]
IBM 'pixie dust' conjures disk storage magic
News By sandwiching a thin layer of the element ruthenium (Ru) between two magnetic layers on the hard disk, scientists at IBM believe they will achieve levels of data density previously thought impossible. [21 May 2001]
The Bloor Perspective: PDAs, ASPs and the end of magnetic disks
Comment Not only is the storage density incredible by today's standards, but the chip architecture is said to provide non-volatile storage with memory contents surviving for a number of years following a power failure. [11 Oct 1999]
