JPH05290515A - Disk device - Google Patents

Abstract

PURPOSE:To reduce the access time to target data during a data reading and to prevent a loss of the data by distributively writing same data on plural and a same track. CONSTITUTION:A controller 40 controls a driving means 2 and a moving means 3 so as to control plural writings of same data on a same track of a disk 1. On an actual disk, data column 30 are written into three data column 31 (data A1, B1 and C1), data column 32 (data A2, B2 and C2) and data column 33 (data A3, B3 and C3), respectively. Therefore, when these data are read, data are quickly discovered, compared with the case of a monotonous writing and an initial access time is reduced. Moreover, even though a portion of the track is broken, a reading is performed from the portion where there exists no breakage thus, the reliability is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device (magnetic disk device, magneto-optical disk device, etc.) mainly used as an external storage device of a computer, and shortens data recording and access time, and The present invention relates to a disk device that prevents loss due to data damage.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional configuration for writing data to a disk device.

In FIG. 3, 1 is a disk for writing data, and 2 is a motor for rotating the disk 1.
The shaded area 10 indicates a track on the disk where data is actually written. Reference numeral 20 is a head for reading / writing data from / on a track on the disk. In this example, the head is one set.

Reference numeral 3 is a motor for moving the head 20.

A portion 30 surrounding the data A, B and C is a data string to be written on the disc. It is the controller 40A that has the role of controlling the actual writing to the disc. The arrows indicate the data flow at that time.

In the conventional device, as shown in FIG. 3, in the case of writing with a single head, data was written one by one onto the tracks of the disk.

An example of using a plurality of heads 21 and 22 is shown in FIG.

In FIG. 4, the controller 40B divides the given data 30 by interleaving, etc. and writes the data strings 34 and 35 for each head separately to the tracks of the disk.

[0009]

However, in the above-mentioned writing method, since only one set of data is written on one track, when reading data,
It tended to take a long time to access the desired data for the first time.

Since only one set of data exists,
If the data is damaged, the data may be lost, leading to a decrease in reliability.

The present invention has been made in view of the above problems, and an object of the present invention is to shorten the time for first accessing the target data when reading the data, In addition, it is to provide a data writing method that improves the reliability of data.

[0012]

In order to achieve the above-mentioned object, the present invention provides a drive means for rotationally driving a disc, a recording means for recording information on the disc, a moving means for moving the recording means, and A structure is provided in which the same data input to tracks scheduled to be designated on the disc are dispersed and recorded at different positions by the rotation of the disc by the driving unit and the movement of the recording unit by the moving unit. did. That is, it is equipped with one or more heads used for writing data to the disk and a driving device for the same, so that these heads write a plurality of the same data in a distributed manner on the same track of the same disk. I chose

[0013]

According to the present invention, when writing the data to the disc, the same data are distributed and written on the same track. Therefore, the purpose is to read the data stored on the disc. It is possible to shorten the time required for the read data to reach the head for reading, and it is possible to shorten the time for first accessing the desired data when reading the data. In addition, even if the same data exists on the same disk multiple times and the existing data in it is damaged, the loss of data can be avoided by using other duplicated data. Can be improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a first embodiment according to the present invention and shows writing of data on a disk. In FIG. 1, 1 is a disk for writing data, and 2 is a motor for rotating the disk 1. The shaded area 10 indicates a track on the disk where data is actually written.
Reference numeral 20 is a head for reading / writing data from / on a track on the disk. In this example, the head is one set.

Reference numeral 3 is a motor for moving the head 20.

Reference numeral 30 is a data string to be written on the disc, and the content of the data string 30 is data A,
It is represented by B and C. It is the controller 40 that has the role of controlling the actual writing to the disc. In this example, the controller 40 controls a plurality of writes of the same data on the same track, and three data strings 31 (data A) on the actual disk.
1, B1, C1) and 32 (data A2, B2, C2)
And 33 (data A3, B3, C3) are duplicated and written.

The arrow indicates the flow of data at that time. With this multiple writes, the next time the data on this track is read, the data can be found earlier than with a single write, and the first access time, which occupies a large part of disk performance, can be shortened. You can

Further, since the same data is distributed and written on the same track, even if a part of the writing on the track is damaged, the data can be quickly obtained by reading from an uncorrupted position on the track. It is possible to contribute to the improvement of reliability.

FIG. 2 shows an example of writing data according to the second embodiment. In this example, the disk device has headers 21 and 22 for reading and writing a plurality of (two in the case of this figure) data. For each of the plurality of headers 21 and 22, the controller 40 duplicates and distributes one data string 30 (data strings 31 and 32) and writes it on the same track 10 of the disc 1. By doing so, it becomes possible to perform the processing of distributing the same data on the same track on the same disk in a plural number at high speed.

When the structure shown in FIG. 2 is further developed and expanded, a plurality of headers for writing the same data when writing data by a plurality of heads are set as a set, and a plurality of sets are prepared at the same time so that a plurality of different data can be simultaneously output. It is also possible to write individually, and it is also possible to speed up writing.

[0022]

As is apparent from the above description, according to the present invention, when data is written to a disc, a plurality of identical data are distributed and written on the same track on the same disc. When reading the data stored on the disk, the time it takes for the target data to reach the read head is shortened, and the time for first accessing the target data is shortened when reading the data. Has the effect of

Further, since a plurality of the same data exist on the same disk, even if some data in the same disk is damaged, the loss of the data can be avoided by using the other duplicated data, and the reliability can be improved. It has the effect of improving the sex.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing data writing according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing data writing by a plurality of headers according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram showing an example of data writing in a conventional disk device.

FIG. 4 is a configuration diagram showing an example of data writing in a conventional disk device having a plurality of headers.

[Explanation of symbols]

 1 Disc Recording Surface 10 Track on Disc 20, 21, 22 Header for Writing Data 30 Data Sequence 40 Controller 31, 32, 33 Replicated Data Sequence

Claims (1)

[Claims] 1. A drive unit for rotating and driving a disc, a recording unit for recording information on the disc, a moving unit for moving the recording unit, a rotation of the disc by the driving unit and a movement of the recording unit by the moving unit. According to the above, there is provided a disk device having means for distributing the same data input to tracks to be designated on the disk at different positions and recording the same.