Recording density was 128 characters per inch ( 198 micrometre / character ) on eight tracks.
2.
HDD data transfer rate depends upon the rotational speed of the platters and the data recording density.
3.
A long play variant, DVCPRO HD-LP, doubles the recording density by using 9 ?m track pitch.
4.
A variant from Sony that uses a wider . 315 inch ( 8 mm ) tape and increases the recording density.
5.
"' Noise-Predictive Maximum-Likelihood ( NPML ) "'is an advanced magnetic data storage systems that operate at high linear recording densities.
6.
The higher capacity was achieved at the same recording density by varying the disk rotation speed with head position so that the linear speed of the disk was closer to constant.
7.
Another technology used to overcome thermal effects to allow greater recording densities is perpendicular recording, first shipped in 2005, and as of 2007 the technology was used in many HDDs.
8.
Tracks one and three are typically recorded at 210 bits per inch ( 8.27 bits per mm ), while track two typically has a recording density of 75 bits per inch ( 2.95 bits per mm ).
9.
By judiciously choosing the parameter " K ", practical NPML detectors can be devised for the magnetic recording channel that provide a substantial performance improvement over PRML and EPRML detectors in terms of error rate and / or linear recording density
10.
But, as the operating point moves to higher linear recording densities, this assumption no longer holds and there is a loss of optimality associated with linear partial-response ( PR ) equalization, which enhances noise and renders it correlated.
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