An Effective Track Width with a 2D Modulation Code in Two-Dimensional Magnetic Recording (TDMR) Systems

Kotchakorn PITUSO; Chanon WARISARN; Damrongsak TONGSOMPORN

doi:10.1587/transele.2018ECP5036

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An Effective Track Width with a 2D Modulation Code in Two-Dimensional Magnetic Recording (TDMR) Systems

Kotchakorn PITUSO, Chanon WARISARN, Damrongsak TONGSOMPORN

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Summary :

When the track density of two-dimensional magnetic recording (TDMR) systems is increased, intertrack interference (ITI) inevitably grows, resulting in the extreme degradation of an overall system performance. In this work, we present coding, writing, and reading techniques which allow TDMR systems with multi-readers to overcome severe ITI. A rate-5/6 two-dimensional (2D) modulation code is adopted to protect middle-track data from ITI based on cross-track data dependence. Since the rate-5/6 2D modulation code greatly improves the reliability of the middle-track, there is a bit-error rate gap between middle-track and sidetracks. Therefore, we propose the different track width writing technique to optimize the reliability of all three data tracks. In addition, we also evaluate the TDMR system performance using an user areal density capability (UADC) as a main key parameter. Here, an areal density capability (ADC) can be measured by finding the bit-error rate of the system with sweeping track and linear densities. The UADC is then obtained by removing redundancy from the ADC. Simulation results show that a system with our proposed techniques gains the UADC of about 4.66% over the conventional TDMR systems.

Publication: IEICE TRANSACTIONS on Electronics Vol.E102-C No.11 pp.839-844

Publication Date: 2019/11/01

Publicized: 2019/08/05

Online ISSN: 1745-1353

DOI: 10.1587/transele.2018ECP5036

Type of Manuscript: PAPER

Category: Storage Technology

Authors

Kotchakorn PITUSO
  King Mongkut's Institute of Technology Ladkrabang
Chanon WARISARN
  King Mongkut's Institute of Technology Ladkrabang
Damrongsak TONGSOMPORN
  Seagate Technology (Thailand)

Keyword

two-dimensional magnetic recording (TDMR), 2D modulation code, intertrack interference (ITI)

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Kotchakorn PITUSO, Chanon WARISARN, Damrongsak TONGSOMPORN, "An Effective Track Width with a 2D Modulation Code in Two-Dimensional Magnetic Recording (TDMR) Systems" in IEICE TRANSACTIONS on Electronics, vol. E102-C, no. 11, pp. 839-844, November 2019, doi: 10.1587/transele.2018ECP5036.
Abstract: When the track density of two-dimensional magnetic recording (TDMR) systems is increased, intertrack interference (ITI) inevitably grows, resulting in the extreme degradation of an overall system performance. In this work, we present coding, writing, and reading techniques which allow TDMR systems with multi-readers to overcome severe ITI. A rate-5/6 two-dimensional (2D) modulation code is adopted to protect middle-track data from ITI based on cross-track data dependence. Since the rate-5/6 2D modulation code greatly improves the reliability of the middle-track, there is a bit-error rate gap between middle-track and sidetracks. Therefore, we propose the different track width writing technique to optimize the reliability of all three data tracks. In addition, we also evaluate the TDMR system performance using an user areal density capability (UADC) as a main key parameter. Here, an areal density capability (ADC) can be measured by finding the bit-error rate of the system with sweeping track and linear densities. The UADC is then obtained by removing redundancy from the ADC. Simulation results show that a system with our proposed techniques gains the UADC of about 4.66% over the conventional TDMR systems.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.2018ECP5036/_p

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@ARTICLE{e102-c_11_839,
author={Kotchakorn PITUSO, Chanon WARISARN, Damrongsak TONGSOMPORN, },
journal={IEICE TRANSACTIONS on Electronics},
title={An Effective Track Width with a 2D Modulation Code in Two-Dimensional Magnetic Recording (TDMR) Systems},
year={2019},
volume={E102-C},
number={11},
pages={839-844},
abstract={When the track density of two-dimensional magnetic recording (TDMR) systems is increased, intertrack interference (ITI) inevitably grows, resulting in the extreme degradation of an overall system performance. In this work, we present coding, writing, and reading techniques which allow TDMR systems with multi-readers to overcome severe ITI. A rate-5/6 two-dimensional (2D) modulation code is adopted to protect middle-track data from ITI based on cross-track data dependence. Since the rate-5/6 2D modulation code greatly improves the reliability of the middle-track, there is a bit-error rate gap between middle-track and sidetracks. Therefore, we propose the different track width writing technique to optimize the reliability of all three data tracks. In addition, we also evaluate the TDMR system performance using an user areal density capability (UADC) as a main key parameter. Here, an areal density capability (ADC) can be measured by finding the bit-error rate of the system with sweeping track and linear densities. The UADC is then obtained by removing redundancy from the ADC. Simulation results show that a system with our proposed techniques gains the UADC of about 4.66% over the conventional TDMR systems.},
keywords={},
doi={10.1587/transele.2018ECP5036},
ISSN={1745-1353},
month={November},}

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TY - JOUR
TI - An Effective Track Width with a 2D Modulation Code in Two-Dimensional Magnetic Recording (TDMR) Systems
T2 - IEICE TRANSACTIONS on Electronics
SP - 839
EP - 844
AU - Kotchakorn PITUSO
AU - Chanon WARISARN
AU - Damrongsak TONGSOMPORN
PY - 2019
DO - 10.1587/transele.2018ECP5036
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E102-C
IS - 11
JA - IEICE TRANSACTIONS on Electronics
Y1 - November 2019
AB - When the track density of two-dimensional magnetic recording (TDMR) systems is increased, intertrack interference (ITI) inevitably grows, resulting in the extreme degradation of an overall system performance. In this work, we present coding, writing, and reading techniques which allow TDMR systems with multi-readers to overcome severe ITI. A rate-5/6 two-dimensional (2D) modulation code is adopted to protect middle-track data from ITI based on cross-track data dependence. Since the rate-5/6 2D modulation code greatly improves the reliability of the middle-track, there is a bit-error rate gap between middle-track and sidetracks. Therefore, we propose the different track width writing technique to optimize the reliability of all three data tracks. In addition, we also evaluate the TDMR system performance using an user areal density capability (UADC) as a main key parameter. Here, an areal density capability (ADC) can be measured by finding the bit-error rate of the system with sweeping track and linear densities. The UADC is then obtained by removing redundancy from the ADC. Simulation results show that a system with our proposed techniques gains the UADC of about 4.66% over the conventional TDMR systems.
ER -