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Shingle-written magnetic recording device with hybrid E-regions

A technology of tile magnetism and recording disk, which is applied in the field of data storage device architecture and can solve problems such as frequent change

Inactive Publication Date: 2013-10-09
HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, in SMR drives, the physical block address (PBA) of the logical block address (LBA) may change frequently

Method used

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  • Shingle-written magnetic recording device with hybrid E-regions
  • Shingle-written magnetic recording device with hybrid E-regions
  • Shingle-written magnetic recording device with hybrid E-regions

Examples

Experimental program
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Embodiment Construction

[0018] figure 1 Shown is a diagram of a data storage device (DSD) 10 employing an SMR with a system electronics unit 21 in accordance with one embodiment of the present invention. The system electronics unit 21 operates according to the prior art except as described herein, and the parts of the system which perform the prior art functions are not shown. The system electronics unit 21 may be a prior art system-on-a-chip, which is an integrated circuit including host interface, controller, servo functions, microprocessor, firmware program, etc. all on a single chip.

[0019] Host / User 11 may be any type of computer and capable of communicating with other devices by any means including via a network. The terms "user" and "host" are used interchangeably. Multiple hosts can also communicate with the device using prior art techniques. Thin film 12 is a magnetic thin film coating, usually deposited on the upper and lower surfaces of a hard disk (not shown), and one device may have...

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PUM

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Abstract

The invention relates to an SMR disk drive with hybrid E-regions, including a nonvolatile solid state memory E-region in addition to magnetic media E-regions on the disk. The memory E-region can be used in operations that can be referred as destaging and / or restaging to sequentialize sets of exception records to reduce the time and energy spent in executing seeks in the disk E-region. The ratio of the size of the solid state memory E-region to the total E-region capacity on the disks can be optimized for selected applications according to the invention using tradeoffs between performance and cost. For example, an embodiment with a memory E-region size that is 10% of the total disk E-region capacity achieves substantial performance enhancement over a disk-only E-region implementation and also results in smaller costs than can be required in a NAND-only memory E-region.

Description

technical field [0001] The present invention relates to the field of data storage device architectures, and more particularly to slab magnetic recording (SMR) devices. Background technique [0002] Conventional disk drives with magnetic media organize data in concentric tracks spaced apart from each other. The slate concept is a form of perpendicular magnetic recording and has been described as a way of increasing the areal density of magnetic recording. In slab magnetic recording (SMR) media, regions (bands) of adjacent tracks are written so as to cover one or more previously written tracks. Unlike traditional split tracks, which can be written in any order, tile tracks must be written sequentially. Tracks on the disk surface are grouped into tiles (also called I-zones). The inscription direction of the I zone can be from inner diameter (ID) to outer diameter (OD) or from OD to ID. On the same surface, it is also possible to shingle the disc from two directions in such ...

Claims

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Application Information

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IPC IPC(8): G11B5/31G11B5/012
CPCG11B5/012G11B5/31
Inventor D·R·霍尔
Owner HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
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