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Related Concept Videos

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MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
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Magnetic Damping01:17

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Related Experiment Video

Updated: Jun 26, 2026

Micro-drive Array for Chronic in vivo Recording: Drive Fabrication
14:03

Micro-drive Array for Chronic in vivo Recording: Drive Fabrication

Published on: April 20, 2009

Reducing write amplification of DM-SMR disks by shingle-aware persistent cache.

Tianming Yang1, Jing Zhang2, Haitao Wu1

  • 1School of International Education, Huanghuai University, Zhumadian, China.

Scientific Reports
|June 24, 2026
PubMed
Summary
This summary is machine-generated.

We propose a new cache cleaning policy for Shingled Magnetic Recording (SMR) drives. This policy improves performance by intelligently flushing cached data, boosting random write speeds by up to 2.31X.

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Related Experiment Videos

Last Updated: Jun 26, 2026

Micro-drive Array for Chronic in vivo Recording: Drive Fabrication
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Published on: April 20, 2009

Hybrid Microdrive System with Recoverable Opto-Silicon Probe and Tetrode for Dual-Site High Density Recording in Freely Moving Mice
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Published on: August 10, 2019

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10:00

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Published on: November 11, 2013

Area of Science:

  • Computer Science
  • Data Storage Technologies

Background:

  • Shingled Magnetic Recording (SMR) technology increases data density by overlapping tracks.
  • Track overlapping prevents in-place updates, leading to data corruption risks and poor random write performance.
  • Drive-Managed SMR (DM-SMR) devices use persistent caches to mitigate these issues by batching writes.

Purpose of the Study:

  • To introduce a novel, shingle-aware persistent cache cleaning policy for DM-SMR drives.
  • To enhance random write performance and data integrity in SMR devices.

Main Methods:

  • Developed a cache cleaning policy that merges cached updates by flushing writes in the shingle direction.
  • Implemented a delayed write-back strategy to proactively free cache space by identifying safely writable data blocks and their optimal write order.
  • Evaluated the policy using diverse block I/O traces.

Main Results:

  • The proposed policy significantly improves cache management efficiency.
  • Achieved up to 2.31X better performance compared to traditional set-associative baseline policies.
  • Demonstrated effective freeing of cache space without incurring read-modify-write costs.

Conclusions:

  • The shingle-aware persistent cache cleaning policy offers a substantial performance improvement for DM-SMR drives.
  • This approach addresses the limitations of in-place updates in SMR technology.
  • The delayed write-back strategy enhances the efficiency of data persistence in SMR systems.