NDLI: Reducing Read Latency of Shingled Magnetic Recording With Severe Intertrack Interference Using Transparent Lossless Data Compression

Content Provider	IEEE Xplore Digital Library
Author	Venkataraman, K.S. Guiqiang Dong Ningde Xie Tong Zhang
Copyright Year	1965
Abstract	With the distinct advantage of retaining conventional head and media, the emerging shingled recording technology improves areal storage density through intentional track overlapping that nevertheless introduces severe intertrack interference (ITI). An economically tenable option for shingled drives is to utilize a single read head. As we continue to increase its areal storage density, there will be a higher probability that a read operation demands reading multiple adjacent tracks for explicit ITI compensation. This directly results in a significant read latency penalty when using a single read head. In this work, we propose a simple design strategy to reduce such ITI-induced read latency penalty. If a sector of user data can be compressed to a certain extent, it will leave more storage space for coding redundancy and, hence, opportunistically enable the use of a stronger-than-normal error correction code (ECC). The stronger ECC can accordingly reduce the probability of reading multiple adjacent tracks for explicit ITI compensation. Beyond a simple intrasector compression, the absence of the update-in-place feature in shingled recording makes it feasible to apply lossless compression across multiple consecutive sectors. This can further improve the compression efficiency and, hence, reduce the probability of reading multiple adjacent tracks. We carried out simulations that successfully demonstrate the effectiveness of the proposed design strategies on reducing the read latency penalty caused by severe ITI in shingled recording.
Sponsorship	IEEE Magnetics Society
Starting Page	4761
Ending Page	4767
Page Count	7
File Size	1354416
File Format	PDF
ISSN	00189464
Volume Number	49
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Signal to noise ratio Data compression Magnetic recording Magnetic heads Target tracking Error correction codes Encoding shingled magnetic recording Lossless compression read latency
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Reducing Read Latency of Shingled Magnetic Recording With Severe Intertrack Interference Using Transparent Lossless Data Compression

Intertrack Interference Cancellation for Shingled Magnetic Recording

Techniques Mitigating Update-Induced Latency Overhead in Shingled Magnetic Recording

Concatenated Codes for Combating Effects of Intertrack Interference in Shingled Magnetic Recording

Signal Model for Shingled Magnetic Recording Based on Data Dependent Erase Band Analysis Under Track Squeeze

Shuffled Multi-Track Detection for Shingled Magnetic Recording Channels With an Array of Read Heads

Reduction of Bit Errors Due to Intertrack Interference Using LLRs of Neighboring Tracks

Two-Track Reading With a Wide-Track Reader for Shingled Track Recording

Comparison of Two-Reader and Three-Reader 2-D Magnetic Recording Systems

Reducing Read Latency of Shingled Magnetic Recording With Severe Intertrack Interference Using Transparent Lossless Data Compression

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