areal
RSS arealThe Era of Giant Magnetoresistive Heads
White Paper Areal density (expressed as billions of bits per square inch of disk surface area, Gbits/in²) is the product of linear density (bits of information per inch of track) multiplied by track density (tracks per inch), and varies with disk radius. [27 Oct 2006]
AFC Media - Extending the Limits of Longitudinal Recording
White Paper Hitachi Global Storage Technologies' (GST's) breakthrough discovery of antiferromagnetically-coupled multi-layers broke this barrier and enabled significant areal density increases while maintaining the thermal stability of recorded data. [27 Oct 2006]
High-Pinning Iridium-Manganese-Chromium (IrMnCr) Read Sensors for High Reliability & Stability
White Paper To fuel the continued growth in areal density of hard drives, the physical dimensions of the read sensor have had to be significantly reduced to accommodate the smaller data bit size. This dramatic reduction of the read sensor - more than 10X in 10... [27 Oct 2006]
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]
High-Performance Write Head Design and Materials
White Paper The rapid increase in areal recording density means that a stronger writing field without side erasure is required. However, the increase in the data transfer rate makes write head optimization difficult. [11 Apr 2005]
Advanced Stiction-Free Slider and DLC Overcoat
White Paper The areal densities of commercial HDDs will increase at a rate of 100% per year and exceed 100 Gbit/in2 in a few years. This paper presents two state-of-the-art technologies: the advanced stiction free slider (SFS) and the diamond-like carbon (DLC... [11 Apr 2005]
Advanced Spin-Valve GMR Head
White Paper Progress in the development of giant magnetoresistive (GMR) spin-valve materials and high-sensitivity spin-valve read heads has allowed a continuous increase of areal recording density in hard disk drives. [11 Apr 2005]
Synthetic Ferrimagnetic Media
White Paper The high areal densities realized today in commercial rigid disk drives are the results of scaling made possible by significant developments in media, head, channel, and coding technologies. The number of grains per bit has been approximately... [07 Apr 2005]
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]
Adaptive Formatting in Hitachi Drives
White Paper In the late 1990’s and early 2000’s areal density for hard disk drives (HDD) approximately doubled every year, until reaching about 40Gb/sqin. Recently technology challenges have slowed the annual areal density growth rate to about half of what it... [01 Mar 2004]
GMR Head Technology: Increased Areal Density and Improved Performance
White Paper Continued advancements in head technology are essential to maintain rapid areal density growth during the next decade. GMR represents the next step in HDD technology from today's AMR heads, and utilizes much of the design, production, and test... [24 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. [24 Feb 2004]
Laptops to get bigger hard drives
News Fujitsu created the 80GB device by increasing the drive's areal density, or the amount of data that a hard-drive platter - a small, thin disk - can store per square inch. Though notebook drives have received a boost from areal density, they lag... [11 Mar 2003]
