Method and device for operating shingled magnetic recording equipment

A technology of shingled magnetic recording and equipment, which is applied to magnetic recording heads, information recording on magnetic disks, magnetic heads using thin films, etc. Effect

Active Publication Date: 2017-03-29
EMC IP HLDG CO LLC
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  • Claims
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Problems solved by technology

However, this became a problem as manufacturers tried to reduce the size of the write head to achieve more tracks on the disk, because a smaller write head means a smaller write area (corresponding to a smaller coercivity), while Smaller write areas will be less and less powerful enough to change the magnetization on the media, making it impossible to write

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  • Method and device for operating shingled magnetic recording equipment
  • Method and device for operating shingled magnetic recording equipment
  • Method and device for operating shingled magnetic recording equipment

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Embodiment Construction

[0021] As mentioned above, the new shingled track layout greatly increases disk density, or TPI, and increases overall drive capacity. But at the same time, in-place updates under the new architecture will corrupt previously written data. Therefore, a logic block address (LBA, logic block address) conversion layer for SMR devices is introduced to reorder logical random accesses into physical sequential writes.

[0022] Similar to the Flash Translation Layer (FTL) for SSDs, SMR devices can use an SMR (or Shingled) Translation Layer (STL). Depending on the location of the STL, the following three types of SMR devices can exist.

[0023] 1. Driver management type

[0024] The first type is called driver management, also known as transparent. Simply put, SMR devices manage all requests from the host, just like traditional HDDs. Driver management has the advantage of not requiring host-aware SMR. Driver-managed SMR devices are compatible with almost any system.

[0025] The d...

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Abstract

The invention provides a method and a device for operating shingled magnetic recording equipment. The shingled magnetic recording equipment comprises a random access area and a sequential access area. Data can be randomly read and written in the random access area. Data can be sequentially read and written in the sequential access area, and the sequential access area is logically divided into multiple memory banks independent of one another in operation. The method comprises the following steps: storing the LBA-to-PBA mapping relation in the random access area; respectively storing the PBA-to-LBA mapping relation of a corresponding part in each of the multiple memory banks in the sequential access area; and operating the shingled magnetic recording equipment based on the LBA-to-PBA mapping relation and the PBA-to-LBA mapping relation. According to the technical scheme of the invention, random access operation which cannot be supported directly by shingled magnetic recording equipment can be supported, so that the equipment has backward compatibility with an operating system or a file system, and convenience is brought to users.

Description

technical field [0001] The embodiments of the present application relate to the field of computer storage technology, and more specifically to a method and an apparatus for operating a Shingled Magnetic Recording (SMR, Shingled Magnetic Recording) device. Background technique [0002] In the field of computer storage technology, perpendicular magnetic recording (PMR, Perpendicular Magnetic Recording) technology is commonly used at present. As is known, PMR uses a parallel track layout. With the ever-increasing demand for hard disk storage capacity in the era of big data, efforts are currently being made to improve the storage capacity of PMRs within the inherent physical limitations of current recording media. [0003] For example, storage capacity is increased by increasing the number of tracks on a disk and correspondingly reducing the size of the write head. In this case, as the density of the track area on the magnetic disk increases, the bit size on the medium decreas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/012G11B5/31
CPCG06F12/0292G06F2212/1056G06F2212/152G06F3/061G06F3/0676G06F3/064G06F3/0626G06F3/0659G06F3/0665
Inventor 韩耕高健肖会兵董继炳张明
Owner EMC IP HLDG CO LLC
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