JPH1186507A - Record reading out method for drum type memory device and drum type memory device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type memory device which attains a higher capacity without increasing the size of drum type recording media larger than heretofore and a record reading-out method of this drum type memory device. SOLUTION: Plural pieces of the drum type recording media 1, 2 varying in the diameters are concentrically superposed on each other. The memory device is so constituted that these drum type recording media may be respectively discretely moved in the cylindrical axial direction of the drums. Plural pieces of tracks 4 are formed in the direction orthogonal with the cylindrical axis on the surfaces of the drum type recording media. The device is provided with the record reading-out means 8 of the information discretely in correspondence to the tracks 4. The drum type recording media directly facing the record reading-out means of the information are subjected to the record reading-out of the information by using the record reading-out means 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type storage device having an increased storage capacity and a recording / reading method thereof.

[0002]

2. Description of the Related Art Conventionally, magnetic drums, magnetic disk devices, optical disk devices and the like are well known as rotary media type storage devices. These devices have evolved primarily as external storage devices for computers. The magnetic drum has a magnetic body provided on a cylindrical surface around the drum, and a ring-shaped or spiral track is mainly provided on the magnetic body to record and read information. In the early days, the magnetic drum type storage device was the mainstream of the external storage device in terms of the accuracy of the medium surface wobble and the followability of the magnetic head. However, drum storage has drawbacks in terms of space efficiency.

In order to increase the storage capacity of a drum type storage device, it is necessary to increase the surface area of a medium surface.
This inevitably increases the size of the drum, making it difficult to cope with recent miniaturization of storage devices. In addition, as the surface area of the drum increases, the moving distance of the reading head increases, causing problems in the movement control and adjustment accuracy of the head. Further, an increase in the moving time of the head accompanying this is inevitable.

Japanese Patent Application Laid-Open No. 4-111280 relates to a small-sized cylindrical recording medium having a diameter of 26 cm.
It is described that when the diameter is smaller than the millimeter, the space efficiency of the drum type recording medium is better. But diameter 2
The amount of information stored in a size of 6 mm is still very limited, and no consideration is given to increasing the capacity of the drum type storage device.

Japanese Patent Application Laid-Open No. Sho 57-164402 discloses a device having a plurality of magnetic heads provided corresponding to respective storage tracks of a magnetic storage device such as a magnetic drum. However, no consideration is given to increasing the capacity of the drum type storage device.

[0006]

As the capacity of various information recording media has been increased, it has been extremely difficult to reduce the size and capacity of the drum type storage device. The purpose of the present invention is
An object of the present invention is to provide a drum-type storage device that achieves high capacity without increasing the size of the drum-type recording medium more than before.

It is a further object of the present invention to provide a recording and reading method for a drum type storage device having an increased storage capacity.

[0008]

According to the present invention, there is provided a recording and reading method according to the present invention, wherein a plurality of drum-type recording media having different diameters are concentrically overlapped, and each of the drum-type recording media is individually A plurality of tracks formed on the surface of each of the drum-type recording media in a direction orthogonal to the cylinder axis, and recording information individually corresponding to the tracks. Reading means for reading and writing information on a drum-type recording medium directly facing the information reading and writing means by using the recording and reading means. Is the way.

According to another aspect of the present invention, there is provided an apparatus for storing a recording medium comprising a plurality of drum-type recording media having different diameters which are concentrically overlapped with each other, wherein each of the drum-type recording media is rotated about a cylindrical axis. Means for individually moving each of the drum type recording media in the cylindrical axis direction, a plurality of tracks formed in a direction orthogonal to the cylindrical axis direction of each of the drum type recording media, on the drum type recording medium A plurality of information recording / reading means provided corresponding to each track, and a control means for recording / reading information on / from a drum-type recording medium disposed opposite to the information recording / reading means. Drum type storage device.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a drum type storage device according to the present invention, a plurality of drum type recording media having different diameters are superimposed on a concentric circle. The recording and reading of information is performed on a drum-type recording medium that directly faces a plurality of information recording and reading means.

A plurality of tracks are provided on each drum type recording medium in a direction perpendicular to the cylindrical axis on a peripheral surface thereof, and a plurality of recording / reading means provided corresponding to each track on the drum type recording medium. The recording or reading is simultaneously performed on each track on the drum type recording medium.
According to the present invention, it is possible to increase the capacity of a drum type storage device and to speed up information recording and reading.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing the superposition of drum-type recording media in a drum-type storage device of the present invention, FIG. 2 is a perspective view of the superposed drum-type recording media, and FIG. It is a figure showing an example.

According to the recording / reading method of the drum type storage device of the present invention, a plurality of drum type recording media 1, 2 and 3 having different diameters are concentrically overlapped and each of the drum type recording media 1, 2 and 3 is provided. Are configured to be individually movable in the cylindrical axis direction of the drum, and the respective drum-type recording media 1 and
A plurality of tracks 4 are formed on the surfaces of the plurality of tracks 4 in a direction perpendicular to the cylindrical axis, and a plurality of individual information recording / reading means 8 are provided corresponding to each of the tracks 4. Information is recorded and read using the recording and reading means 8 on a drum-type recording medium exposed on the surface, that is, a drum-type recording medium directly facing the information recording and reading means 8.

As shown in FIG. 1, in the present invention, a plurality of drum type recording media 1, 2 and 3 having different diameters are superimposed on a concentric circle. The number of superpositions is not particularly limited to three, and an arbitrary number of two or more may be selected. As shown in FIG. 2, a ring-shaped track 4 is provided on the cylindrical surface of the drum-type recording medium 1 in a direction perpendicular to the cylinder axis, and furthermore, an intermediate drum-type recording medium 2 and an innermost drum-type recording medium are provided. Tracks 4 are similarly provided on the medium 3. Preferably, the number of tracks per drum type recording medium is 72, but the number is not particularly limited. Also, the same number of information recording / reading means 8, that is, recording / reading heads as the tracks are provided.

Next, one mode of the information reading operation of the present invention will be described with reference to FIG. Each drum type recording medium 1,
2 is supported by a driving shaft 6 having a driving plate 5 and a rotation assisting plate 7 having a plurality of circular grooves corresponding to the diameter of each drum, and driven and rotated by a motor 10. For example, the outermost drum-type recording medium 1 is supported by grooves formed in the driving plate 5 and the rotation assisting plate 7 corresponding to the drum-type recording medium 1, and then rotated at a high speed by the rotation of the driving shaft 6 by the motor 10. The information is read by the recording and reading means 8. The read information is sent to the CPU via the recording / reading driver 13, and is stored in another data memory 14 as needed.
Also communicates with other peripherals.

In the present invention, the drum type storage device has the same number of recording / reading means 8 as the number of tracks 4 on the drum type recording medium, so that the information on the tracks on the rotatably driven drum type recording medium 1 can be read at one time. Alternatively, they can be read sequentially or partially. Recording and reading of information on the drum-type recording medium can be performed only by rotating the drum-type recording medium without moving the recording / reading means head in the lateral direction.

When all the information on the outermost drum type recording medium 1 is read, or when the information on the inner drum type recording medium 2 is desired directly, for example, the left rotation assisting plate in FIG. 7 is removed to the side, the outermost drum-type recording medium 1 is moved to the left in the figure by slightly pushing the drive plate 5 to the left, and then the drum-type recording medium is removed by the take-out unit 9. The medium 1 is caused to escape to the left, and the inner drum type recording medium 2 is exposed.

That is, the multiplexed drum-type recording media 1 and 2 are rotated by a rotating means having an arbitrary push-out and pull-out configuration, and only necessary drum-type recording media are opposed to the recording / reading means. Unnecessary drum type recording media are moved in the horizontal direction. Although the moving means and the rotating means are not particularly limited, for example, a configuration as shown in FIG. 3 can be used.

The exposed inner drum type recording medium 2 is
After being supported by the drive plate 5 and the groove formed in the rotation auxiliary plate 7 in the same manner as the drum type recording medium 1, the drive shaft 6
Is rotated at a high speed by the rotation of
It is read by the recording and reading means 8 lowered by the motor 12 controlled by U. Although not shown, information can be read from the innermost drum type recording medium 3 which may be further inside in the same manner. Here, if information on the outermost drum type recording medium 1 is desired again, the outermost drum type recording medium 1 is moved to the right in the drawing again by the drum take-out section 9 and inserted into the outermost drum type recording medium. 1 is exposed to the recording and reading means 8. The movement, that is, the removal and insertion of the drum-type recording medium is not limited to one operation per operation. Particularly, in the case of random access, a plurality of drum-type recording mediums are moved at one time to obtain desired information. It is desirable that the drum type recording medium is immediately exposed to the surface.

Although the operation of the present invention for reading information on a drum type recording medium has been described above, it should be noted that the recording of information is performed by exactly the same operation. The recording and reading of information may be sequential or random.

[0021]

According to the present invention, since a plurality of drum type recording media are superimposed on a concentric circle, the capacity of the drum type storage device can be increased without increasing the size of the device.

[Brief description of the drawings]

FIG. 1 is a diagram showing the superposition of drum type recording media in a drum type storage device of the present invention.

FIG. 2 is a perspective view of a drum type recording medium that is superimposed.

FIG. 3 is a diagram showing a specific example of the method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Drum type recording medium 2 ... Drum type recording medium 3 ... Drum type recording medium 4 ... Track 5 ... Drive plate 6 ... Drive shaft 7 ... Rotation auxiliary plate 8. ··· Recording and reading means 9 ········································································································ Data memory

Claims (6)

[Claims] 1. A configuration in which a plurality of drum-type recording media having different diameters are concentrically overlapped and each of said drum-type recording media is individually movable in a cylindrical axis direction of a drum. A plurality of tracks are formed on the surface of the recording medium in a direction orthogonal to the cylindrical axis, and information recording and reading means are individually provided corresponding to the tracks, and the drum is directly opposed to the information recording and reading means. Recording / reading information on / from a recording medium using the recording / reading means. 2. The recording and reading method according to claim 1, wherein said drum type recording medium is a drum type magnetic recording medium. 3. The recording and reading method according to claim 1, wherein said drum type recording medium is a drum type optical recording medium. 4. A storage means in which a plurality of drum-type recording media having different diameters are concentrically overlapped, a means for rotating each of the drum-type recording media with respect to a cylindrical axis, and each of the drum-type recording media is individually Means for moving in the cylindrical axis direction, a plurality of tracks formed in a direction perpendicular to the cylindrical axis direction of each of the drum-type recording media, and a plurality of information provided corresponding to each track on the drum-type recording medium A drum-type storage device, comprising: a recording / reading unit; and a control unit configured to execute recording or reading of information on a drum-type recording medium arranged opposite to the information recording / reading unit. 5. The drum type storage device according to claim 4, wherein said drum type recording medium is a drum type magnetic recording medium. 6. The drum type storage device according to claim 4, wherein said drum type recording medium is a drum type optical recording medium.