JPH04109462A - Recording/reproducing device for replaceable recording medium - Google Patents

Abstract

PURPOSE:To realize the recording and reproduction of optical disks different in their formats by the same device by recording previously a control program to control the recording/reproduction of data to/from a designated address based on a logical format. CONSTITUTION:A control circuit 4 reads in an identifier ID from the control track area 7 of the optical disk 6, and compares it with the identifier ID written before in a memory 5, and the control circuit 4 informs a service program of the completion of the preparation of the operation and the identifier ID of the optical disk 6, and the service program issues a read/write instruction to an optical disk device by an accessing method corresponding to the identifier ID. The control circuit 4 starts a format control program stored in the memory 5, and accesses the user data track area of the optical disk 6, and reads and writes the data. Thus, the optical disk of plural types different in their format types can be recorded and reproduced by one set of the device.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a data recording and reproducing device, and in particular, to improve the compatibility of various media, and to improve the compatibility with current media when the recording and reproducing method is changed due to higher density in the future. Regarding optimal recording and playback to maintain compatibility.

[Conventional technology]

A conventional optical disk device is 1, for example, Japanese Patent Application Laid-Open No. 63-1069.
As described in Publication No. 30, in order to read/write multiple types of different optical discs, the reflectance of the recording power disc, modulation method, etc. are recorded in advance in a designated area on the disc. A method is known in which the recording current of the device and the like are set in accordance with the characteristics of the disk by reading this information before reading/writing user data.

[Problem to be solved by the invention]

However, different optical discs differ not only in physical characteristics such as the above-mentioned recording power and disk reflectance, but also in the logical format of the data, such as center length, gap length, center configuration, address assignment, and CRC method. The allocation of spare sectors/tracks may also be different, but the device was designed for one type of logical format. Therefore, it has been impossible to record/play back optical discs with different logical formats using the same device. Furthermore, if in the future the capacity increases due to higher density and a logical format suitable for it is adopted, the new device will no longer be able to read the previous optical disk, and vice versa. Optical discs have an extremely long shelf life, which is one of their advantages, but such problems are a real problem.

The above conventional technology does not take into account the compatibility of the logical formats of various optical disks, and when a new logical format is adopted in the future, there is a problem that new devices will not be able to read the old type of optical disks. There was a problem in that in order to read optical discs, it was necessary to continue making old-type devices.

[Means to solve the problem]

A control program (hereinafter referred to as a format control program) that establishes a specific area on an optical disc (hereinafter referred to as a control track area) and controls the recording/reproduction of data to specified addresses based on the logical format of the disc. Make a rough record of it,
Before recording/reproducing data, a format control program is read from the control track area.

The device executes the format control program in response to the user data recording/playback instruction from the host device,
Enables recording/reproduction of data to a specified address. With the above means, optical discs with different logical formats can be recorded/reproduced by the same device. Furthermore, since optical disks have a much larger capacity than floppy disks and magnetic disks, even if the above program is stored, the capacity for storing user data is hardly affected.

[Effect]

When an optical disk is set in the apparatus, the optical head is first positioned at the beginning of the control track area, and a format control program is read. Since the location of the control track area and the logical format of the track are the same regardless of the type of optical disc, the device can read data in the area without any problem. Since the format control program that controls the logical format of an optical disk is stored in the optical disk, the device does not need to have a control circuit for different logical formats for each optical disk, and the same device can record optical disks with different logical formats. /Playback becomes possible.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings. The processing device 1 runs a business program using an optical disk. Optical disc installation! 2 controls reading data from the optical disk 6 or controlling data writing to the optical disk 6 based on a request from a business program. The business program performs data read/write on a plurality of different types of optical disks 6. The six-optical disk device N2 performs data read/write control on a plurality of different types of optical disks 6. The drive mechanism 3 performs rotation control of the optical disk 6, positioning control of the read/write head, tracking control, etc. under the control of the control circuit 4, but since this is not the purpose of the present invention, a detailed explanation will be omitted. Further, in FIG. 1, parts unnecessary for explanation of the present invention are omitted. Further, FIG. 2 shows the track structure of the optical disc 6, which is composed of a control track area 7 and a user data track area 8. As shown in FIG.

Note that FIG. 2 is just one example, and the invention is not limited to this. The track targeted for processing by the business program is the user data track area 8, and the recording format of the track differs depending on the type of the optical disc 6. The recording format method of the control track area 7 is the same regardless of the type of optical disc 6, and the identification I that identifies the format method of the user data track area 8
A format control program for controlling data loading/writing based on D and the format method is recorded.

First, when the optical disc 6 is set in the drive mechanism 3, the control circuit 4 controls the control track area 7 of the optical disc 6.
The identification ID is read from the memory 5 and compared with the identification ID already written in the memory 5.

If they do not match, the control circuit 4 further reads the format control program and writes it into the memory 5 together with the identification ID. Since the control track area 7 is the same regardless of the type of optical disc 6, the control circuit 4 can read the identification ID and format control program using the same procedure regardless of the type of optical disc 6. The control circuit 4 is
A report indicating that the optical disk 6 is ready for operation and the identification ID of the disk are reported to the business program. The business program issues read/write commands to the optical disk device using an access method according to the identification ID.

The control circuit 4 starts the format control program stored in the memory 5, accesses the user data track area of the optical disc 6, and performs data read/write. Incidentally, if the identification ID read from the control track area 7 of the set optical disc 6 matches the identification stored in the memory 5, the control circuit 4 causes the format control program of the disc to be stored in the memory 5.
It is determined that the data is stored in the optical disk 6, and reading of the format control programmer 11 from the disk is stopped, and the business program includes the operations 1i11! of the optical disk 6. Only report that the equipment is complete.

FIG. 3 shows the structure of the track. One track consists of one or more sectors. FIG. 4 shows an example of the format of each sector. It includes GAP indicating the beginning of the sector, PREAMBLE for performing phase alignment, etc., TRACK/5ECTORADDRESS indicating address 5YNC1, DATA where data is recorded, CRC for error checking, etc.

Note that FIG. 4 is just one example, and since the sector length, constituent elements, CRC type, etc. differ depending on the type of optical disc 6, the format control program corresponding to each format may be set to a common format for the types of optical discs 6. It is stored in the control track area 7 where it is recorded in a format.

〔Effect of the invention〕

According to the present invention, 1
This has the advantage that a single device can record and play back multiple types of optical discs with different formats.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a track structure diagram of an optical disc, FIG. 3 is a track block diagram, and FIG. 4 is a diagram explaining the details of FIG. 3. 1. Processing device, 2. Optical disk device, 3. Drive mechanism, 4. Control circuit, 5. Memory, 6. Optical disk, 7. Control track area, 8. User data track. region. Figure 1

Claims (1)

[Claims] 1. In a recording/playback device that records/plays data on a replaceable recording medium, all or part of the program related to controlling the recording/playback of data on the recording medium is stored in a designated area on the recording medium. 1. A recording/reproducing device for a convertible recording medium, characterized in that the device stores a program and reads and writes data to and from the recording medium by reading and executing the program.