JPH046672A - Method for recording information - Google Patents

Abstract

PURPOSE:To rapidly execute recording or reproducing processing by recording information with comparatively high using frequency in a zone formed on the outer peripheral side of a disk. CONSTITUTION:A physical block is constituted of plural zones ZO to Zl and the zones ZO to Zl are divided in the radius direction of magneto-optical disk so that the innermost peripheral zone is ZO and the outermost peripheral zone is Zl. The number of sectors is set up so as to be increased in the outer periph eral side and the number of sectors is increased one by one in accordance with the increment of tracks in each zone. Thereby, an instruction commanding a recording position is constituted of two commands respectively instructing the zone Zl and another zone and information such as file control information to be frequently recorded/reproduced is recorded in the address x to y in a logical block. Thus, the recording/reproducing processing can rapidly be execut ed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an information recording method for recording information on a disc-shaped recording medium such as an optical disc or a magneto-optical disc (hereinafter collectively referred to as a disc).

[Prior Art] As methods for recording information on a disk, there are a CAV method in which recording pits are formed on a track at a constant angular velocity, and a CLV method in which recording pits are formed at a constant linear velocity. CA
In the V method, since recording is performed at a constant angular velocity, the recording density at the outer circumference of the disk is lower than at the inner circumference. Therefore, the recording density is low on the outer circumferential side of the disk (because the amount of information actually recorded is small compared to the maximum recording capacity, and the usage efficiency of the recording surface is low.On the other hand, in the CLV method, the sectors are not radial). Also, since the rotational speed differs depending on the recording position, data cannot be reproduced until the rotational speed reaches a target value at the time of access, resulting in a disadvantage that the access time becomes longer.

Therefore, as a method for solving the drawbacks of the CAV and CLV methods, there is, for example, the MCAV method as described in Japanese Patent Laid-Open No. 167874/1983. In this MCAV method, a disk is divided into a plurality of zones in the radial direction, and recording is performed by lowering the rotational speed of the disk in the outer peripheral zone. Also known as the same MCAV method is a method in which the disk is rotated at a constant speed and the recording frequency is increased in the outer peripheral zone.

By the way, the information recording and reproducing device (magneto-optical disk device)
10, as shown in FIG. 4, is connected to a host computer 11, which is a higher-level control device, and performs recording and reproduction according to instructions from the host computer 11. The magneto-optical disk device and the host computer are, for example, SSCSR (Smoll Compute).
r System Interface). The host computer includes an operating system (hereinafter abbreviated as O8), and manages files by sending control information such as file management information and actual file information to the magneto-optical disk device.

``The recording position of information on the magneto-optical disk is determined by O8, and when the interface is SC3I, the recording position is indicated by a logical address. The magneto-optical disk device is
Converts logical addresses to physical addresses and performs recording and playback. Conversion from logical address to physical address is done by
For example, this is because a defective sector on the magneto-optical disk is replaced with a replacement sector, or because the number of sectors in a track differs from zone to zone.

[Problems to be Solved by the Invention] As mentioned above, in the MCAV system, the disk is rotated at a constant speed and the outer zone has a high recording/reproducing frequency. Therefore, recording and playback can be performed faster on the outer side of the disk than on the inner side.However, the position on the disk where information is recorded and played back is determined by the logical address specified by O8.
Generally, O8 is used in ascending order of address, so recording is performed from the inner circumference side of the disc. Therefore, regardless of the frequency of use of information, it is recorded sequentially from the inner circumference of the disc, so if frequently used information is recorded on the inner circumference of the disk, the recording and playback processes will take longer than on the outer circumference. There was a problem with the efficiency.

The present invention has been made to solve these problems, and its purpose is to provide an information recording method that allows relatively frequently used information to be recorded and reproduced at high speed.

[Means for solving the problem] In order to achieve the above object, a disk-shaped recording medium whose recording area is divided into a plurality of zones in the radial direction is rotated at a constant speed, and the outer zones have a high recording frequency ( In the method of recording information by changing the recording frequency for each zone, information that is relatively frequently used among the information is recorded in an outer zone. A method is provided.

[Function] According to the present invention, by recording relatively frequently used information on the outer circumferential side of the recording medium, recording and reproduction processing can be performed at high speed.

[Examples] Examples of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a drawing that best represents the features of the present invention, and shows the relationship between physical blocks and logical blocks of a disk-shaped recording medium. In this example, a magneto-optical disk is used as the disk-shaped recording medium.

In FIG. 1, the physical block includes multiple zones zO~
It is composed of Z℃. As shown in FIG. 2, these zones are divided in the radial direction of the magneto-optical disk, with the innermost zone being ZO1 and the outermost zone being Zρ. Further, the number of sectors in the zone is set so that the zone on the outer circumferential side has the largest number.

In this example, as shown in FIG. 3, the number of sectors in one track of the zone increases by one toward the outer circumference.

In FIG. 3, the number of sectors per track in the innermost zone zO is n, the number of tracks in each zone is m, and n increases by one toward the outer circumference. Therefore,
If the total number of physical blocks N is calculated under these conditions, it can be found using the following equation. Note that one logical block is one sector.

N=nm+(n+1)+n+(n+2)n++ −・
-+(11+4)m=1/2 (p!,+2n) (
ρ+1)m−1 Furthermore, the remaining number N′ of physical blocks excluding zone 2° C. can be obtained by the following equation.

N'l/2(j2 +2n-1112m) The number of physical blocks obtained here includes the number of replacement sectors in the replacement sector area 1b shown in FIG.
User sector area 1a excluding b becomes a logical block,
Information sent from the host computer can be recorded.

The magneto-optical disk formatted in this manner is driven by a spindle motor (not shown) and rotates at a constant speed. Furthermore, recording and reproduction are performed using the MCVA method in which the recording and reproduction frequency is higher in the outer peripheral zone. A control section (not shown) in the device divides the zone into two, zone ZI2 and other zones, and determines which zone to use depending on the information. For example, file management information for managing file information is recorded in the outermost zone 2β because it is used relatively frequently. Further, normal file information is recorded in zones other than the outermost zone. Therefore,
There are two types of commands to designate the recording position, one to designate zone 2°C and the other, and information that is frequently recorded and reproduced, such as file management information, is as shown in Figure 1.
Recording is performed at addresses X to y of the logical block. Further, normal file information is recorded at address o''-x.

In the above embodiment, the zones are divided into two, the outermost zone and the other zones, and which zone to use is determined based on the frequency of use. However, you can also decide which zone to record in according to its rank.

[Effects of the Invention] As explained above, according to the present invention, information that is relatively frequently used is recorded in the outer zone.
Recording processing or reproduction processing can be performed at high speed.

In other words, since the recording position on the recording medium is specified according to the frequency of use of information, the processing of frequently used information can be processed using the fastest processing function of the device, resulting in efficient recording and playback processing. be able to.

[Brief explanation of drawings]

FIG. 1 shows the information recording method of the present invention.
An explanatory diagram showing the relationship between physical blocks and logical blocks of a magneto-optical disk formatted in AV, FIG. 2 is a plan view showing a state in which the magneto-optical disk is divided into a plurality of zones in the radial direction, and FIG. 3 4 is an explanatory diagram schematically showing tracks and sectors of each zone, and FIG. 4 is a block diagram schematically showing a magneto-optical disk device and its peripheral devices. 1a... User sector area 1b... Replacement sector area zONZI2; Zone Figure 1 Agent Patent Attorney Seki Yamashita Flat Figure Lid Figure

Claims (2)

[Claims] (1) A disk-shaped recording medium whose recording area is divided into multiple zones in the radial direction is rotated at a constant speed, and the recording frequency is changed for each zone so that the outer zone has a higher recording frequency. An information recording method, characterized in that among the information, information that is used relatively frequently is recorded in an outer zone. (2) The information includes file information and management information for managing this file information, and the file information is recorded in an inner zone and the management information is recorded in an outer zone. Information recording method described.