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Opportunities and Challenges in Two Dimensional Magnetic Recording

Event Details

Event Dates: 

Saturday, February 15, 2014 - 5:30pm

Seminar Location: 

  • Other

Seminar Location Other: 

Seagate Technology, Longmont, CO

Speaker Name(s): 

Jonathan Coker

Speaker Affiliation(s): 

HGST, a Western Digital Company
Seminar Type/Subject

Event Details & Abstract: 

The   hard   drive   industry   is  investing   heavily   in  alternative   recording   technologies   because conventional perpendicular recording is now reaching its useful limits. The majority of these configurations (e.g., heat-assisted magnetic recording, microwave-assisted magnetic recording, and bit-patterned   magnetic   recording)   solve  essential  writing-process   problems.  In  contrast,  two- dimensional  magnetic  recording  (TDMR)  is  focused  on  the  read-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  next  generation  HDD  technology. While  generally  regarded  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 system.  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.

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