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Disk device, controller circuit, and method for controlling disk device

A technology of a control circuit and a control method, applied in the control field of a disk device, a controller circuit and a disk device

Active Publication Date: 2020-01-21
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when retrying reading, it may take a rotation waiting time to detect the target position in the circumferential direction of the disk.

Method used

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  • Disk device, controller circuit, and method for controlling disk device
  • Disk device, controller circuit, and method for controlling disk device
  • Disk device, controller circuit, and method for controlling disk device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0031] Next, use image 3 The operation of the data reading process according to the first embodiment will be described. image 3 A flowchart for explaining the operation of the first reading process executed by HDD 10 according to the first embodiment is shown.

[0032] image 3 The flowchart shown is started after performing servo processing (seek processing) that places the head (read head RH) on the target track including the target sector that is the target of the read processing. In the first reading process executed in the first embodiment, data of the target sector is first read on the target track, and data of other sectors on the same track are read as necessary. The first read process is executed when a command indicating a data read request is received from host 100 , or is executed in response to a read request generated inside HDD 10 . The read request generated inside HDD 10 includes a read request based on update processing or verification processing for dat...

no. 2 Embodiment approach

[0046] Next, use Figure 5 The operation of the data reading process according to the second embodiment will be described. Figure 5 A flowchart for explaining the operation of the second reading process executed by HDD 10 according to the second embodiment is shown.

[0047] The second reading process performed in the second embodiment differs from the first reading process in that it is not limited to first reading the data of the target sector on the target track. In the following description, configurations different from those of the first reading process will be described in detail, and descriptions of the same configurations will be simplified or omitted. The second read process is executed when a command indicating a data read request is received from the host 100 , or is executed in response to a read request generated inside HDD 10 . The second reading process is mainly executed by RWC61 and HDC63.

[0048] Through the seek process to the target track, when the he...

no. 3 Embodiment approach

[0058] Next, use Figure 7 The operation of the data reading process according to the third embodiment will be described. Figure 7 A flowchart for explaining the operation of the third reading process executed by HDD 10 according to the third embodiment is shown.

[0059] The third reading process performed in the third embodiment differs from the first reading process in that it does not wait for the completion of error correction of data read from all target sectors, or output data for all the target sectors in the target track. The read gate RG of the sector starts preparations for seek processing to another track. In the following description, configurations different from those of the first reading process will be described in detail, and descriptions of the same configurations will be simplified or omitted. The third read process is executed in response to a read request from host 100 or in response to a read request generated inside HDD 10 . The third reading proces...

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PUM

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Abstract

The invention provides control methods that can properly control the disk device, controller circuit, and disk device that can be readable from the disk.The disk device of the embodiment has: record medium, its recorded data; decoding circuit, which decodes the data read from the record medium;The result of the decoding of the 1st data performed by the decoding circuit starts to control the control of the 2 data from the record medium after reading the first data.Data that is not related to reading requests.

Description

[0001] This application enjoys the priority of the earlier application with Japanese Patent Application No. 2017-86463 (filing date is April 25, 2017). This application incorporates the entire content of the earlier application by reference to this earlier application. technical field [0002] Embodiments of the present invention relate to a disk device that controls data reading from a disk, a controller circuit, and a control method of the disk device. Background technique [0003] In recent years, there has been a disk drive including a magnetic disk as a recording medium and a playback head facing the magnetic disk. The disk device includes a hard disk drive (HDD). Regarding HDD, in reading data from a magnetic disk, magnetic information is read from a target position on a rotating magnetic disk by a reproducing head, and the magnetic information is demodulated to obtain desired data. Even if the reading of the magnetic information from the magnetic disk is completed, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/012G11B20/18
CPCG11B5/012G11B20/18G11B2020/183G11B5/5547G11B5/09
Inventor 丸山彰介古桥佳奈
Owner KK TOSHIBA
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