JPH02216668A - Data recorder - Google Patents

Abstract

PURPOSE:To obtain the real time property and the high reliability by reading out the contents of a memory at the finishing time of sending out all of data and recording them to a specified unit recording area such as an alternate sector of a recording medium. CONSTITUTION:Input data are continuously recorded in a series of the unit recording areas of the recording medium (magneto-optical disk) 6, e.g. individual sectors, and a continuous processing mode is premised. When a recording disabled unit recording area, e.g. a defective sector is detected during this continuous processing mode, an alternate processing mode becomes effective, and a corresponding data is stored in the memory 5 for buffering temporarily. Then, on completion of recording all of the inputted data, the contents of the memory 5 are recorded in the specific unit recording area of the recording medium 6, e.g. the alternate sector. By this method, both advantages of the real time property in the continuous processing mode and the high reliability in the alternate processing mode can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data recording device suitable for use, for example, when recording audio data, video data, or computer data on a recording medium such as a disk.

[Summary of the invention]

In this invention, input data is continuously recorded in a series of unit recording areas of a recording medium, and when a unit recording area that cannot be recorded is detected, the corresponding data is stored in a memory, and when recording of all input data is completed, By recording the contents of the memory in a specific unit recording area of the recording medium, it is possible to obtain the advantages of both continuous processing and alternate processing, that is, real-time performance and high reliability.

[Conventional technology]

Generally, when recording data on a recording medium, two modes are considered: a continuous processing mode, which is used when recording continuous information such as audio data or video data, and an alternating processing mode, which is usually used for computer data storage. .

In the case of audio data, video data, etc. used in continuous processing mode, real-time performance is required, but since continuous data has a mutual correlation, interpolation processing can be performed, and the influence of errors can be avoided to a certain extent.

On the other hand, in the replacement processing mode, for example, if there is a defective area due to scratches or the like in the sector in which data is to be written when shipping a hard disk or magneto-optical disk, a defective sector mark is placed and the sector cannot be used. In this way, the corresponding data is written in a spare sector prepared as a reserve, and the data is transferred to the spare sector at the time of read-after-write or the like.

[Problem to be solved by the invention]

However, in the case of the above-mentioned continuous processing mode, although it has the advantage of real-time performance, it has the disadvantage that it cannot be processed completely if the error exceeds a certain size, and reliability is poor. Further, in the case of the alternate processing mode, although it has the advantage of high reliability, it has the disadvantage that real-time performance is difficult.

The present invention has been made in view of these points, and it is an object of the present invention to provide a data recording device that can perform processing by incorporating the advantages of both continuous processing and alternate processing.

[Means to solve the problem]

The data recording device according to the present invention continuously records input data in a series of unit recording areas of a recording medium (6),
When an unrecordable unit recording area is detected, the corresponding data is stored in the memory (5), and when all input data recording is completed, the contents of the memory (5) are recorded in a specific unit recording area of the recording medium (6). Configure it to do so.

[Effect]

Input data is continuously recorded in a series of unit recording areas, for example, each sector, of the recording medium (6). In other words, continuous processing mode is assumed. If a non-recordable unit recording area, such as a defective sector, is detected during this continuous processing mode, a replacement processing mode is entered, and the corresponding data is stored in the memory (5) and temporarily buffered. Then, when all the input data has been recorded, the contents of the memory (5) are transferred to the recording medium (6).
) is recorded in a specific unit recording area, for example, in a replacement sector.

This ensures the advantages of both real-time performance in the continuous processing mode and high reliability in the alternate processing mode.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on FIGS. 1 to 3, taking as an example a case where a magneto-optical disk is used as a recording medium.

FIG. 1 shows the circuit configuration of this embodiment. In the figure, (1) is a host device, (2) is a magneto-optical disk storage device, and the host device (1) is a magneto-optical disk storage device. (2) and performs data input/output.

The magneto-optical disk storage device (2) includes an interface circuit (3), a write circuit (4), a memory (5), a magneto-optical disk (6), an optical head (7), and a continuation circuit (8). )
and a control section (9).

The interface circuit (3) is connected to the host device (1) and converts input/output signals. The write circuit (4) receives the output signal from the interface circuit (3) and sends a signal for writing data to the magneto-optical disk (6) to the optical head (
7). The memory (5) is a memory using RAM, for example, as a buffer for temporarily storing the corresponding data when a defective sector is detected as a unit recording area that cannot be recorded, such as a defective sector or a sector with an unreadable address during recording. It is. The optical head (7) reads data from the magneto-optical disk (6) and supplies it to the continuous output circuit (8). The control unit (9) is a circuit that controls the entire magneto-optical disk storage device (2), and is connected to each block.

Next, the operation shown in FIG. 1 will be explained with reference to the flowchart shown in FIG. 2, taking as an example the case of recording computer data.

When the host device (1) issues a write command to the magneto-optical disk storage device (2) in step (11), it enters the write mode.
Computer data is supplied from a host device (1) to a write circuit (4) via an interface circuit (3). In step (12), the write circuit (4) determines whether it is a bad sector or a sector whose address cannot be read, that is, whether it is a non-recordable sector. If a negative result is obtained, step (
At step 13), the write circuit (4) writes the input data to a predetermined sector of the disk (6) via the optical head (7).

On the other hand, if a positive result is obtained in step (12), in step (14) the write circuit (4) stores data corresponding to a defective sector or a sector whose address cannot be read in the memory (5). In step (15), it is determined whether or not the data transmission has been completed, and if all data transmission has not been completed, the process moves to the next sector in step (16), and the same operation as described above is repeated. Dog.

If all the data has been sent out in step (15), in step (17) the writing circuit (4) reads out the data stored in the memory (5) and sends it to the disk via the optical head (7). (6) Write to a specific unit recording area, for example, a replacement sector.

Incidentally, when the memory (5) becomes full in step (14), for example, the process may be switched to normal continuous processing, or the process may be interrupted at - time and data may be written in an alternate sector.

Next, an example will be described in which the data to be recorded includes a mixture of audio data or video data (hereinafter referred to as A/V data) and computer data, with reference to the flowchart in FIG. In addition, in FIG. 3, parts corresponding to those in FIG. 2 are given the same reference numerals and explained.

In step (11), when the host device (1) issues a write command to the magneto-optical disk storage device (2), it enters the write mode, and data is transferred from the host device (1) to the interface circuit (3).
) to the write circuit (4). Step (1
8) In the write circuit (4), the input data is A
/■ It is determined whether the data is A/V data or not, and if it is A/V data, the writing circuit (4) writes the input A/V data to the disk (6) via the optical head (7) in step (13). Write to a given sector.

In step (18), if it is not A/V data, that is, if it is computer data, it is determined in step (12) whether it is a bad sector or a sector whose address cannot be read. If a negative result is obtained, step (13) is performed. Write circuit (4)
input computer data into a predetermined sector of the disk (6) via the optical head (7).

On the other hand, if a positive result is obtained in step (12), in step (14) the write circuit (4) stores computer data corresponding to the defective sector or the sector whose address cannot be read in the memory (5). In step (15), it is determined whether or not the data transmission has been completed, and if all data transmission has not been completed, the process moves to the next sector in step (16), and the same operation as described above is repeated. Esu.

If all the data has been sent out in step (15), in step (17) the writing circuit (4) reads out the computer data stored in the memory (5), and reads out the computer data stored in the optical head (5).
7) to a specific unit recording area of the disk (6), such as a replacement sector.

In this case as well, in step (14) the memory (5
) becomes full, it may be possible to switch to normal continuous processing, for example, or to interrupt the process and write to an alternate sector.

Furthermore, in the above-described embodiments, the replacement sector area may be a part of a predetermined track in the middle or outer periphery of the disk, or may be used over a plurality of sectors or a plurality of tracks.

〔Effect of the invention〕

As described above (according to the present invention, when input data is continuously recorded in a unit recording area of a recording medium, if an unrecordable unit recording area such as a defective sector or a sector whose address cannot be read is detected, the corresponding data is is stored in a buffer memory, and at the end of sending all data, the contents of the memory are read out and recorded in a specific unit recording area such as an alternate sector of the recording medium. It is possible to obtain the advantages of both, real-time performance and high reliability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIGS. 2 and 3 are flowcharts for explaining the operation of the present invention. (1) is a host device, (2) is a magneto-optical disk storage device, (4) is a write circuit, (5) is a memory, (6) is a magneto-optical disk, and (7) is an optical head. Figure 1 Figure 2

Claims (1)

[Claims] Input data is continuously recorded in a series of unit recording areas of a recording medium, and when an unrecordable unit recording area is detected, the corresponding data is stored in a memory, and all recording of the input data is completed. A data recording device characterized in that the contents of the memory are recorded in a specific unit recording area of the recording medium at the time when the data is recorded.