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Disk device and controlling method of disk device

A control method, controller technology, applied in the direction of instrumentation, input/output to record carrier, calculation, etc., capable of solving problems such as time increase

Inactive Publication Date: 2016-10-26
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in recent years, since the number of commands that can be queued in the disk device has increased, the time required for the reordering process has increased.

Method used

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  • Disk device and controlling method of disk device
  • Disk device and controlling method of disk device
  • Disk device and controlling method of disk device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0021] figure 1 It is a block diagram schematically showing an example of a schematic configuration of the disk device according to the first embodiment. As the disk device, a hard disk drive (HDD) or the like can be exemplified.

[0022] The disk drive 10 includes a disk 11, a spindle motor 12, a head stack assembly (Head Stack Assembly, hereinafter referred to as HSA) 13, a head amplifier integrated circuit (hereinafter referred to as head amplifier IC) 14, and a random access memory (hereinafter referred to as HSA). Referred to as RAM) 15, read / write channel (hereinafter referred to as R / W channel) 16, hard disk controller (hereinafter referred to as HDC) 17, central processing unit (hereinafter referred to as CPU) 18, motor driver IC20.

[0023] The disk 11 has a recording surface S on which data is recorded, and is rotationally driven by a spindle motor 12 . In the disk device 10, a plurality of disks 11 are provided. In addition, on all the recording surfaces S inclu...

no. 2 Embodiment approach

[0080] In the first embodiment, when there is no other command in the table to which the command currently being executed belongs, or when the medium access of the command has not been completed, the table adjacent to the table to which the command currently being executed belongs in a predetermined direction is referred to. Group. The reference direction is a preset direction. In the second embodiment, a case will be described in which the reference directions of adjacent groups are specified based on the physical position of the command currently being executed.

[0081] In the disk drive 10 according to the second embodiment, the HDC 17 also has a function of specifying the reference direction of the table at the time of reordering processing. Figure 11 It is a diagram schematically showing an example of a method of specifying a table reference direction in the second embodiment. As shown in the figure, the storage capacity of each group is divided into areas where it be...

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Abstract

According to one embodiment, there is provided a disk device including a disk to store data and a controller to control writing data to the disk and reading data from the disk. The controller queues a command from a host device, executes a first command included in the queued command, and executes reordering processing to a plurality of commands which accesses a vicinity of a physical position of an access destination of the first command.

Description

[0001] related application [0002] This application enjoys the priority of the basic application based on U.S. Provisional Patent Application No. 62 / 144,605 ​​(filing date: April 8, 2015). This application incorporates the entire content of the basic application by referring to this basic application. technical field [0003] This embodiment generally relates to a disk device and a control method thereof. Background technique [0004] In the disk device, commands issued from a higher-level device (host device) are queued. In addition, for all queued commands, reordering is performed to change the execution order of the commands in order to shorten the access time to the medium. However, in recent years, since the number of commands that can be queued in the disk device has increased, the time required for the reordering process has increased. Contents of the invention [0005] Embodiments of the present invention provide a disk device and a control method thereof capab...

Claims

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Application Information

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IPC IPC(8): G06F3/06
CPCG06F3/0676G06F3/061G06F3/0659
Inventor 长岛康之梅田通彦户田诚二山本稔
Owner KK TOSHIBA