JPH01287802A - Method for recording signal - Google Patents

Abstract

PURPOSE:To attain the high speed access at a large capacity and high transfer rate by forming a circular arc recording area on a disk medium while a disk medium and a writing device equipped with two writing means or above provided on a disk medium main surface are both rotated. CONSTITUTION:While a disk medium 1 and a writing device 4 equipped with two writing means 3a and 3b or above provided on a disk medium 1 main surface are both rotated, the circular arc recording area is formed on the disk medium 1. Thus, by the rotation of both disk medium 1 and writing device 4, the writing means 3a and 3b travel on all tracks fundamentally, and a signal is recorded or reproduced. The rotation number difference between the disk medium 1 and the writing device 4, the size and the like are set so that the writing means 3a and 3b can successively travel on the adjoining track. Thus, while the disk 2 goes around, the writing means 3a and 3b travel on all tracks and the access time can be drastically shortened.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) This invention relates to engineering and signal recording.

(Prior art) The current fE1 recorder is showing an increasing trend towards large ratios and high speed ratios. In particular, for disk media such as optical disks and magnetic disks, the area (or volume) per
Not only is it possible to achieve a large amount of data with a very small amount of data, but also a high transfer rate can be obtained due to the high rotation of the disk medium.
It has become the mainstream of current large-capacity recording devices.

By the way, although these disk media can have a high transfer rate, since the data tracks are formed concentrically on the disk medium, track access takes a relatively long time. This is especially true when the number of tracks is large, and this is a major limitation in reducing access time.

In addition, the head is configured to move in a straight line in the direction across the track, and when trying to shorten the access time, the continuous head movement results in sudden starts and sudden braking. The minute servo is also required to have high sensitivity, and if you want to increase the head seek speed, you will need a large voice coil and a step V pig/motor, which will be a limiting factor when compared to a small size.

The average access time of small AHDs (hard disks) currently in use is on the order of several 10 m5ec.

However, this is a direct time when accessing one track, and if the data is divided into multiple tracks, the access time can easily reach more than 860 times.

(Problem to be Solved by the Invention) As described above, with the conventional technology, it was not possible to obtain access time sufficient to cope with increased capacity and high transfer rate ratio, and this was an impediment to increasing speed.

An object of the present invention is to provide a signal recording method that enables high-speed access while taking advantage of the characteristics of disk media, such as large capacity and high transfer rate.

[One Achievement of the Invention] (Means for Solving the Problems) The present invention provides a signal recording method for recording information on the main surface of a rotating disk medium, and the present invention provides a signal recording method that includes a disk medium and a recording medium provided on the main surface of the disk medium. This is a signal recording method in which the fP characteristic is to form an arc-shaped recording area on a disk medium while rotating a writing device equipped with two or more means A.

(Operation) In the signal recording method of the present invention, a signal is recorded on a rotating disk medium by a writing device that rotates close to the surface of the disk medium. The writing device consists of a rotating body equipped with a plurality of writing means, and the rotating shaft of the rotating body is fixed, and the writing means writes signals onto the disk medium while rotating around the axis. The disk medium rotates itself 11
1, many arc-shaped tracks are formed on the disk medium. The shape of the track is the difference in relative size between the disk medium and the writing device.

The relative positional relationship between the two rotating shafts is determined by the difference t in the number of revolutions per rotation. The movement of the writing means in the longitudinal direction is effected by the rotation of the writing device, and the movement between the L1 tracks is effected continuously by the rotation of the disk medium.

During one rotation of both the disk medium and the writing device, the writing means basically records or reproduces signals while traveling over all the tracks. The rotational speed difference between the disk medium and the writing device so that the writing means sequentially travels on adjacent tracks;
By setting the size, etc., the writing means runs on all the tracks during one revolution of the disk. In other words, the information on all tracks can be reproduced and the information on all tracks can be recorded while the disk medium goes around once, making it possible to significantly shorten the access time.

Furthermore, the writing means is switched during recording or reproduction so that the tracks on the disk medium do not overlap each other. The writing means are arranged and switched in accordance with the rotation angle of the writing means when forming one recording track. For example, 1
If the rotation angle of the truck is 120°, -1 including installation -ζ
If three writing means are provided at 120° intervals and the writing means is switched so that it can record/reproduce only when it is on the track, information can be recorded without any time delay.

(Example) This unknown embodiment will be explained below.

FIG. 1 is a perspective view showing the basic configuration of a signal recording device for explaining an embodiment of the present invention.

As shown in Figure 1, the machine is operated by a rotating disk medium.

It is rotationally driven by a motor 2. This is medium 1, Kamisaiko.

A head rotating body (writing device) 4 to which heads (V writing means) 3a and 3b are attached is provided, and is rotated by a motor 5t. The head 3a*3b+tb records or reproduces a signal on the disk medium l while rotating around the rotation @6 as the head rotating body 4 rotates.

FIG. 2 is a top view of the apparatus, and shows how tracks are formed on the disk medium l by the rotating heads 3a and 3b. The head 3a rotates at high speed together with the head rotating body 4.

Arc-shaped tracks are sequentially formed on the disk medium l rotating from 3bG. FIG. 2 shows a state where a track Tn is being written by the head 3b. Track Tn-5゜'l'n-3. T
n-1 is Tn-6° Tn-4 by the head 3b
, Tn-2, and Tn are formed alternately.

When the recording by the head 3b is completed, the head 3a starts recording due to circuit switching, and at the same time, the head 3b becomes unable to record. The heads are similarly switched during playback. During recording and reproduction, the heads 3a and 3b are switched every time the rotor rotates half a revolution.

The shape of the track is determined by the ratio of the rotational speed of the disk medium to the rotational speed of the head rotating body.

ω is the angular velocity of rotation of the disk medium. , and the angular velocity of the V-shaped rotating body and ω, a track as shown in FIGS. 3A to 3D is formed depending on the ratio thereof. In Figure 3, A is ω = 5ω.

B is ω=ioωO C is ω=15ωG D is ω=20ω.

%1's drawing is superimposed on the trajectory of the truck.

When the rotational speed of the head rotational body is relatively low, the effective length of one track becomes long, and conversely, when the rotational speed of the head rotational body is high, it becomes short, and the trajectory of the track approaches 1 day.

Let the radius of the center of the track on the disk medium be γ, and ω
= ω. When the following relationship holds, the track pitch Tp at the center of the track is expressed as (in the case of n heads).

Thus, according to the signal recording device of the actual tM example.

One rotation of both the disk medium and head rotating body.

Since the rotating head sequentially travels over all the tracks, even if the amount of recorded data or reproduced data is enormous, recording/reproduction can be performed in a short access time.

FIG. 4 is a perspective view showing the structure of a signal recording device for explaining an embodiment of the present invention. The top of the rotating disk medium l is the head l 3a.

13 b * l 3 c, 13 d k A V-shaped rotating shaft 4 is provided to the mounting a, and is rotated by a motor 5. The heads 13a to 13d rotate around rotation @@6 as the head rotating body 4 rotates (
Form a track on top.

FIG. 5 shows the locus of the track ψ formed by the V-domains 13a to 13df of ff14. fart,.

The rotating body 4 has four V-domains 1 spaced apart from each other by 90".
3a, 13b, 13e, and 13d are attachments. Tracks Tn-8, Tn-4, and Tn are formed by the head 3c, and tracks Tn-7, Tn- are formed by the head 3bf.
3. Tn-1 is the truck Tn-6 from the 3aj
゜Tn-2 is track 'I'y1 from head 3d+
-9, Tn-5, and Tn-1 are formed alternately.

In this embodiment as well, the same effects as above can be obtained.

Like above 7? :According to the implementation sequence, the configuration is such that signals are recorded and reproduced on a disk medium that rotates at a rate of 10% with a plurality of heads rotating on 37 planes. drive on the track in sequence. As a result, the disk medium can run over all the tracks during one revolution, and a large amount of data can be recorded/reproduced in a short access time.

In particular, when it is necessary to frequently rewrite data on the entire surface of the disk medium or an area close to it, data can be recorded/played out in a much shorter access time than with conventional disk media using concentric tracks. can. This allows information storage.

The waiting time for track access, which is the cheapest part of the reading process, can be significantly reduced, and an ergonomic (easy-to-use system for everyone) can be built.

〔Effect of the invention〕

According to the present invention, it is possible to provide a signal recording method that enables high-speed access with large capacity and high transfer rate.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the configuration of a t-th signal recording device to explain an embodiment of the present invention; FIG. 3 is a diagram showing the difference in track locus shape depending on the ratio of the head rotation speed and the disk rotation speed. FIG. FIG. 5, a perspective view showing the configuration, is a diagram showing the track pattern on the recording medium and the movement pattern of the recording/reproducing head in FIG. 4. I...Disk medium f*% 2...Disk vomiting motor, 3a, 3b, 13a, 13b, 13c, 13d.-
Head (writing means), 4... Head rotating body (writing device), 5... Motor, 6... Rotating shaft. Agent: Patent Attorney Chika Nori [Same as on the right: Hikaru Matsuyama 2 Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] (1) In a signal recording method for recording information on the main surface of a rotating disk medium, the disk is rotated while the disk medium and a writing device provided on the main surface of the disk medium and having two or more writing means are both rotated. A signal recording method characterized by forming an arcuate recording area on a medium.