Performance evaluation of the disk drive industry´s second-generation partial response maximum likelihood data channel

Author

Kerwin, G.J. ; Galbraith, R.L. ; Coker, J.D.

Author_Institution

ADSTAR, Rochester, MN, USA

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

4005

Lastpage

4008

Abstract

The latest generation of partial-response maximum-likelihood data channel, recently made available in the IBM 0664 2 Gbyte 3.5 inch disk drive, are examined, and how well it performs its base operation of extracting data from the disk as well as how well it has begun to put other potential sampling detection advantages into practice is reported. Beyond the data rate improvements over the predecessor channel, this latest offering, referred to as the PRDF channel for its expanded digital filter complexity allows a disk drive to perform self-test and self-diagnostics. The use of self-test capability is described as a tool for obtaining precise equalization over all data areas of the 0664 disk drive. The self-diagnostic aids are discussed as a method of reducing the probability of data loss in a disk drive

Keywords

automatic testing; digital filters; floppy discs; maximum likelihood estimation; 2 GB; 3.5 in; IBM 0664; PRDF channel; disk drive; expanded digital filter complexity; partial response maximum likelihood data channel; precise equalization; probability; sampling detection; self-diagnostic aids; self-diagnostics; self-test; Built-in self-test; Circuits; Disk drives; Magnetic heads; Manufacturing; Maximum likelihood detection; Performance gain; Robustness; Sampling methods; Signal processing algorithms;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281371

Filename

281371