JPS60234272A - Disk memory - Google Patents

Abstract

PURPOSE:To increase its writing speed by providing the write control parts to each of plural data write earths. CONSTITUTION:A write control part 6 controls a data write earth 2 so that the earth 2 can move toward the reciprocating direction A and reach the upside of the 1st designated track of a disk medium 1. Hereafter the write control parts 7-9 control the data write arms 3-5 so that these arms reach the upside of the 2nd-4th designated tracks of the medium 1. In case four data designated by the same track number exist, the parts 6-9 set positions so as to arrange the arms 2-5 at the same position. When four data having different track numbers to be written are written on the medium at a time, the write control parts are provided so as to set positions of the data write arms independently of each other. Thus the track selection time can be reduced apparently down to 1/4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a disk storage device, and particularly to a disk storage device in which data is written and read using light or magnetism.

[Prior art]

A conventional disk storage device includes a disk medium, one data write arm, and one write control section.

FIG. 1 shows a first example of a conventional disk storage device, in which data is written to a disk medium 1 using a data write arm 2 whose write position is determined by a write control unit 6. Ta.

Here, the disk medium 1 is divided into a plurality of concentric tracks, each track is divided into a plurality of sectors, and write data is designated by a track number and a sector number. For data where the track number and sector number are not consecutive, each time the track number is changed, the position of the data writing arm 2 is moved in the reciprocating direction A by the full write control unit 6 to the specified track. Wait until the specified sector is reached as the disk medium 1 rotates, then write the data.

△ The waiting time A until the specified sector appears is 1/2 of the rotation period O of the disk medium 1, and the selection time TMO until the specified track is selected is the data write from the innermost track to the outermost track. It is defined as 1/2 of the time tm required for the arm 2 to move.

The write preparation time /R, which is the sum of the sector waiting time at the current maximum allowable rotation speed of the disk medium 1 and the selection time at the maximum rotation speed of the pulse motor that moves the data writing arm 2, is the track number and the sector. The disadvantage of multi-generational data with randomly assigned numbers is that they are too long to meet the demands of today's data processing systems.

FIG. 2 shows a second example of a conventional disk storage device, which includes a disk medium 1, four data write arms 2 to 5, and one write control section 6.

The data write arms 2 to 5 are moved simultaneously by the write control unit 6, that is, the data write arms 2 to 5 are always located on the same track.

Therefore, when data with the same track number and divided into four sectors is input manually, the waiting time △ T'WA is (1/2X
However, if the track designation is random, the selection time -〇 remains trrI//2, and the write preparation time T'WR is too long to meet the demands of today's data processing systems. There is a drawback.

In other words, conventional disk storage devices have the disadvantage that the speed at which data is written to the disk medium is slow.

[Purpose of the invention]

An object of the present invention is to provide a disk storage device that can increase the writing speed.

[Structure of the invention]

The disk storage device of the present invention includes a disk medium for recording information, a plurality of data writing arms arranged at predetermined intervals on the same surface of the disk medium, and a plurality of data writing arms for each of the data writing arms. The data write arm is configured to include the same number of write control units as the data write arm.

[Explanation of Examples]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 3 is a block diagram showing one embodiment of the present invention.

The disk storage device shown in FIG. 3 includes a disk medium 1, data write arms 2-5, and write control units 6-9.

The write control unit 6 can move the data write arm 2 in the reciprocating direction A and controls the data write arm 2 so that it is positioned above the first designated track of the disk medium 1. Similarly, the write controllers 7 to 9 control the data write arms 3 to 5 so that they are positioned above the second to fourth designated tracks of the disk medium 1.

If there are four pieces of data in which the same number and number are specified, the write control units 6 to 9 may perform position setting so that the data write arms 2 to 5 are aligned at the same position.

When writing four pieces of data with different track numbers and track numbers to the recording medium 1 at the same time, the write control unit is provided so that the position of the data write arm can be set independently, so it is difficult to select the track. The time TMo' can be apparently shortened to 1/4.

In the above embodiment, an example was described in which the write preparation time can be shortened by providing the write control unit so that the position can be set independently for each data write arm. With this configuration, data writing can be performed independently and in parallel for each write control section, which has the effect of further increasing the writing speed.

〔Effect of the invention〕

The disk storage device of the present invention can support multiple pieces of data in which the positions and track numbers of each data writing arm are randomly specified by adding the same number of write control units as all data writing arms. Since it is possible to set the number of data, the writing preparation for the number of data equal to the number of data writing arms can be completed with one command from the write control section, which has the effect of increasing the writing speed.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a disk storage device showing one conventional example, FIG. 2 is a block diagram showing another conventional example, and FIG. 3 is a block diagram including an embodiment of the present invention. 1...Disk medium, 2-5...Data writing arm, 6-9...Writing control unit, 7-

Claims (1)

[Claims] A disk medium for recording information, a plurality of data writing arms arranged at predetermined intervals on the same surface of the disk medium, and a position of each data writing arm can be set independently. What is claimed is: 1. A disk storage device comprising: a write control section provided so as to read and write data;