Opportunities and Challenges in Two Dimensional Magnetic Recording
Thursday, February 6, 2014 - 3:00pm - 4:00pm
KEC 1007
Jonathan Coker
HGST, a Western Digital Company
Abstract:
Because conventional perpendicular recording is now reaching its useful limits, the hard
drive industry is heavily invested in several alternative recording technologies. The
majority of these configurations (such as heat-assisted magnetic recording,
microwave-assisted magnetic recording, and bit-patterned magnetic recording) secure their
advantages by solving essential problems in the writing process. In contrast,
two-dimensional magnetic recording (TDMR) expends its essential focus on the reading
process, by providing multiple looks at adjacent written information via multiple read
sensors on one slider. This "sleeper" technology was rather abruptly
recognized, at a recent conference of recording technologists, as a leading contender for
the next generation of HDD technology. While generally thought of as a more conventional
option than the alternatives, TDMR nevertheless has profound impact on magnetic component
design and on elements of the entire supporting recording sy!
stem. These impacts will be reviewed in detail from both a magnetic system and
a signal-processing perspective. Innovations in linear and nonlinear system
identification techniques in two dimensions will be proposed and illustrated.
Speaker Biography:
Jonathan Coker is a champion of innovative recording technologies that improve the performance, efficiency, and areal density of hard-disk drives (HDDs). As HGST's Chief Architect for HDDs, Coker plays a leading role in HGST's shingled and two-dimensional recording technology efforts. Coker was educated at Wheaton College (B.A., Liberal Arts and Engineering, 1983) and at the University of Minnesota (B.S.E.E., 1984; M.S.E.E, 2006; E.E. Ph.D., 2008). Coker began his career in 1984 at IBM, where he made key contributions to the development and integration of such industry firsts as thin-film disks, magnetoresistive heads, and partial-response, maximum-likelihood data channels. During 2001-7, Coker was a supervising researcher at the Mayo Clinic, working on advanced circuit architectures and implementations for medical and defense-related applications. Coker is a frequent guest lecturer at industry gatherings and seminars. He holds about 50 patents in the areas of magnetic recor!
ding, radar devices and medical applications. Jon has written 22 journal
articles or conference papers.
_______________________________________________
Colloquium mailing list
[email protected]
https://secure.engr.oregonstate.edu/mailman/listinfo/colloquium
