Interlaced Magnetic Recording
Interlaced Magnetic Recording
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DOI：
10.1109/tmag.2016.2638809
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发表时间：
2017-04
影响因子：
2.1
通讯作者：
E. Hwang;Jongseung Park;R. Rauschmayer;B. Wilson
中科院分区：
文献类型：
--
作者：
E. Hwang;Jongseung Park;R. Rauschmayer;B. Wilson
本文提出了一种可供选择的磁记录结构和相应的信号处理方案，称为隔行扫描磁记录(IMR)。磁道以不同的线密度以隔行扫描的方式记录，这在面密度能力(ADC)和就地更新写入开销之间提供了有利的折衷。通过预先定义记录顺序，磁道可以处于双面压缩或非压缩状态，并且可以通过微分线密度来优化平均ADC。用微像素化磁通道模型进行的数值评估表明，IMR的ADC增益高于传统的垂直磁记录(PMR)，而重写开销与叠瓦式磁记录(SMR)相比可控。例如，IMR提供的ADC比PMR高4.21%，接近1 TB/2通道密度情况，而最多需要1次重写开销，与SMR中的典型更新开销相比可以忽略不计。通过将隔行扫描的轨道聚集为子区域并切换通道配置，可以有效地管理IMR的写入和读取。
In this paper, an alternative magnetic recording architecture and corresponding signal processing schemes are presented, named interlaced magnetic recording (IMR). Tracks are recorded in an interlaced manner with different linear densities, which provides favorable tradeoff between areal density capability (ADC) and update-in-place write overhead. By predefining the recording order, tracks are under either double-sided squeeze or non-squeeze, and average ADC can be optimized by differentiating the linear density. Numerical evaluations with a micro-pixelated magnetic channel model show the ADC gain of IMR over conventional perpendicular magnetic recording (PMR), while manageable rewrite overhead compared with the shingled magnetic recording (SMR). For example, IMR provides 4.21% higher ADC over PMR near 1 Tb/in2 channel density scenario, while requires at most 1 rewrite overhead, negligible compared with the typical update overhead in SMR. Writing and reading of IMR can be efficiently managed by aggregating interlaced tracks as sub-zones and switching the channel configurations.