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Magnetic disk device and disk access method therefor

A technology of magnetic disk equipment and magnetic disk, applied in information storage, recording information storage, instruments, etc., can solve problems such as reducing the transmission efficiency of data between magnetic disk and buffer memory

Inactive Publication Date: 2007-04-11
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It provides a disk device and disk access method for the disk device to obtain the bandwidth required by the connected device, so that even if a large amount of serial data of multiple series is accessed, the data between the disk and the buffer memory will not be reduced. transfer efficiency

Method used

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  • Magnetic disk device and disk access method therefor
  • Magnetic disk device and disk access method therefor
  • Magnetic disk device and disk access method therefor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0047] FIG. 2 shows a first embodiment of the present invention, and shows the magnetic disk device shown in FIG. 1 and a disk access method for the device. Actually, FIG. 1 shows: when the uplink device 1 simultaneously accesses two series of massive serial data stored in different positions in the disk 7 of the disk device 8, the processing on the disk 7.

[0048] File(m-1)', file(m), file(m)' and file(m+1) form part of a large amount of serial data (A), while file(n-1)', file(n), File (n)' and file (n+1) constitute a part of a large amount of serial data (B). Each file has a data length for processing by the uplink device 1 each time a command is used.

[0049] When the uplink device 1 accesses two series of a large amount of serial data at the same time, the uplink device 1 will alternately issue a command to access each file of a large amount of serial data (A) and a command to access a large amount of serial data in a fixed cycle. Commands for each file of serial data ...

no. 2 example

[0056] FIG. 3 shows a second embodiment of the present invention, and shows the magnetic disk device shown in FIG. 1 and a disk access method for the device. Actually, FIG. 1 shows the processing on the disk 7 of the disk device 8 when the uplink device 1 simultaneously accesses two series of large amounts of serial data stored in different locations in the disk 7 of the disk device 8 .

[0057] File(m-1)', file(m), file(m)' and file(m+1) form part of a large amount of serial data (A), while file(n-1)', file(n), File (n)' and file (n+1) constitute a part of a large amount of serial data (B). Each file has a data length for processing by the uplink device 1 when the command is used.

[0058] When the uplink device 1 accesses two series of large amounts of serial data at the same time, the uplink device 1 will alternately issue a command to access each file of a large amount of serial data (A) and a command to access a large amount of serial data (B) Commands for each file.

...

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Abstract

Data can be transferred in a short time with the number of seeking operations reduced, and with the access unit to a magnetic disk defined as the number of sectors per track when a plurality of series of mass serial data are accessed by detecting whether or not access is performed in series according to a stored command history of the access to a plurality of series of mass storage file on a magnetic disk, and by actually accessing the magnetic disk not based on the data length requested by a command, but based on a track unit depending on the transfer state of each series when the seriality of the plurality of series is detected. Thus, the data transfer efficiency can be improved with the number of seeking operations reduced.

Description

technical field [0001] The present invention relates to a kind of disk device called mass storage (with disk as storage medium) and a related disk access method. Background technique [0002] Conventionally, in computer systems for controlling and processing office automation equipment, industrial machines and devices, etc., it has been required to use a mass storage device with a large capacity as a storage device for storing a large amount of information data to be processed. As a mass storage device satisfying these requirements, a magnetic disk device using a magnetic disk as a storage medium is widely used. [0003] When a file is transferred between the disk device and an uplink device externally connected to the disk device, the basic operation of the above-mentioned disk device is: interpret a command issued by the uplink device; according to the command, let a head Searching for an optional track of the disk in the disk device; and reading and writing data to the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06G11B20/12G06F13/14G11B20/10
CPCG06F3/0659G06F3/0611G11B20/1217G11B2020/1238G11B2220/2516G11B2020/1062G11B2020/1295G11B2020/10916G06F3/0676G06F3/06
Inventor 恒内登已夫
Owner PANASONIC CORP