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Data recovery method and device for imbricated magnetic recording disk

A technology of shingled magnetic recording and recovery methods, which is applied to data error detection, electrical digital data processing, digital recording/reproduction, etc., to avoid irrecoverable effects.

Active Publication Date: 2021-03-30
HANGZHOU HIKVISION DIGITAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention provides a data recovery method for a shingled magnetic recording disk to solve the problem of data protection before the disk is damaged

Method used

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  • Data recovery method and device for imbricated magnetic recording disk
  • Data recovery method and device for imbricated magnetic recording disk
  • Data recovery method and device for imbricated magnetic recording disk

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Embodiment Construction

[0050] In order to make the purpose, technical means and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0051] When the embodiment of the present application detects that the disk is abnormal, based on the situation of the abnormal zone (Zone), the abnormal zone is set to a read-only state, so as to prevent the data in the disk from being unrecoverable after the disk is damaged.

[0052] see image 3 as shown, image 3 A system schematic diagram of an embodiment of the present invention is shown. The system includes a host computer, a disk drive, and an API interface between the host computer and the disk drive, wherein the host computer includes a processor, the host operating system, and the processor execute control code for interacting with the disk drive; the disk drive includes a The controller of the data channel, carrying the read / write head arm, the rea...

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PUM

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Abstract

The invention discloses a data recovery method for an imbricated magnetic recording disk. The method comprises the following steps: obtaining the information of a bad sector of the disk at a host computer end; sending a command to a disk according to the magnetic track area Zone to which the bad sector belongs, and setting the magnetic track area to be in a read-only state; counting whether the quantity of the read-only Zones in the disk surface of the disk exceeds a set first threshold value or not, sending a command to the disk when the quantity exceeds the first threshold value, and settingall the Zones in the disk surface to be in a read-only state; and counting whether the quantity of the read-only Zones in the disk exceeds a set second threshold value or not, sending a command to the disk when the quantity exceeds the second threshold value, and setting all the Zones in the disk to be in a read-only state. The health condition of the storage equipment can be monitored, and the disk with the service life close to the threshold value can be stripped from the system to be checked and repaired.

Description

technical field [0001] The invention relates to the field of computer network data storage, in particular to a data recovery method and device for a shingled magnetic recording disk. Background technique [0002] Shingled Magnetic Recording (SMR, Shingled Magnetic Recording) technology is to partially overlap adjacent tracks like roof tiles, eliminating the gap between tracks, thus increasing the number of tracks that can be accommodated on each disk surface , so that the magnetic recording density is greatly increased, so that the capacity of the magnetic disk can be greatly increased without changing the physical size of the magnetic disk. [0003] A traditional magnetic disk (CMR, Conventional Magnetic Recording) has two magnetic heads: one for writing data and one for reading data. Usually, writing data requires a stronger magnetic field than reading data, so the writing head is larger than the reading head. In this way, The width of the track needs to be consistent wit...

Claims

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Application Information

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IPC IPC(8): G06F12/16G06F11/14G11B20/18
CPCG06F12/16G06F11/1402G11B20/18Y02D10/00
Inventor 张宏海
Owner HANGZHOU HIKVISION DIGITAL TECH