JP3107028B2 - Recording control device for disk-shaped recording medium and data recording method for magneto-optical disk device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a recording control device for a disk-shaped recording medium and a data recording method for a magneto-optical disk device, and more particularly to a recording control device for a disk-shaped recording medium capable of high-speed writing. .

[0002]

2. Description of the Related Art A magneto-optical disk records information by applying a vertical magnetic field from the outside and changing the direction of the vertical magnetic field to the direction of the external magnetic field by the heat of a laser beam. On the magneto-optical disk, these storage units are managed in sector units, and reading and writing are performed in sector units.

The handling of data in a conventional magneto-optical disk will be described with reference to FIG. When writing data (FIG. 6 (a)), the perpendicular magnetic field recorded on the magneto-optical disk is aligned (erased) in a certain direction, and then a magnetic field in the opposite direction is applied to record information ( writing). Further, a check (verify) is performed to check whether the written data is correctly written, thereby ensuring the reliability at the time of writing.

When erasing data (see FIG. 6)
(B)) A mark indicating that the data of the sector is no longer used (marked with X in FIG. 6) is written in the management area, and the area where the data is actually written is left as it is. Further, when replacing data (FIG. 6C), the data is replaced in the same procedure as writing.

However, in the above-described method, when writing,
There is a disadvantage that it takes a long time to write since the erasing operation is always performed. In order to solve such a problem, there has been proposed a method of performing a data erasing process during an idle time of the process. In the second magneto-optical disk recording apparatus described in Japanese Patent Application Laid-Open No. 3-147571, the address of a sector that is no longer needed during the idle time of the process is checked, and data is erased from the unnecessary sector. A method for speeding up writing to a sector has been proposed.

[0006] Japanese Patent Application Laid-Open No. 7-216 is similar to the above.
No. 00 is known. However, JP-A-3-147
No. 571 and Japanese Patent Application Laid-Open No. 7-21600,
Since the process of erasing the unused portion is performed during the idle time of the process, when the writing to the unused portion occurs, the erasing process is omitted and the writing time is reduced by two procedures of "writing" and "verify". Is possible. However, when a write request is issued to an area in which some data has already been written, there is a drawback that the procedure of “erase”, “write”, and “verify” must be performed as in the past.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks of the prior art and, in particular, to provide a novel disk-shaped recording medium capable of speeding up the rewriting of data in an area where data has been written. An object of the present invention is to provide a recording control device and a data recording method for a magneto-optical disk device.

[0008]

SUMMARY OF THE INVENTION The present invention basically employs the following technical configuration to achieve the above object. That is, the first aspect of the recording control apparatus for a disk-shaped recording medium according to the present invention is a data recording apparatus .
In a recording control apparatus for a recordable disc-shaped recording medium, a first management table for displaying a recording state of each area of the disc-shaped recording medium, and an area for recording data corresponding to the first management table Second management table that displays
A first means for temporarily writing data in a writable alternative area when data cannot be written to the requested area when a data write request is issued; A second means for displaying in a predetermined portion of the first management table indicating that the temporarily written area is an alternative use, and a second management table corresponding to the first management table Write data indicating the area where data is to be recorded in a predetermined portion of the
When there is a data write request,
Based on the first management table and the second management table , data is written to the writable alternative area immediately, and the second aspect is characterized in that: Timer to monitor idle time
The write request for the data written to the alternate area
And fourth means for writing to a predetermined area, and when the timer counts a predetermined idle time, the first means
Using the management table and the second management table, the
The fourth means writes the data written in the substitute area to a predetermined area for which the write request has been made, and the third mode is that the data of each area of the first management table is The portion indicating the recording state is recorded with an identification code indicating any one of an erased area, a used area, an unerased area, and an alternative used area. In an embodiment, the disk-shaped recording medium is a magneto-optical disk.

A first aspect of a data recording method for a magneto-optical disk device according to the present invention is a data recording method for a magneto-optical disk device in which data can be written only in an erased area. If the data cannot be written to the requested area at the time of writing, the data is written immediately by temporarily writing the data to a writable alternative area, and then the replacement is performed at an idle time when there is no processing request. The data recording is speeded up by writing the data written in the area to the area of the write request, and the second mode enables data to be written only to the erased area. In the data recording method of the magneto-optical disk device, the first step of requesting writing to the sector N of the magneto-optical disk; A second step of searching for an erased sector for performing temporary writing, and an unerased part of the first management table indicating the recording state of each area of the magneto-optical disk. A third step of inserting an identification code indicating that the sector is a sector, and inserting an identification code indicating an alternative use in a portion of the first management table indicating the sector found in the second step; A fourth step of recording a sector number N in a predetermined portion of a second management table corresponding to a portion in which an alternative recording area is displayed; and the alternative recording area using the first and second management tables. And a fifth step of performing a temporary alternative write to the sector N. A third mode is a sixth step of erasing the sector N, and A seventh code for recording an identification code indicating that the erasing process has been performed on the sector N in a portion indicating the sector N of the management table, and an identification code indicating non-erasing in a replacement write sector portion of the first management table. And an eighth step of recording the data of the alternately recorded sector in the sector N.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A recording control apparatus for a disk-shaped recording medium according to the present invention is a recording control apparatus for a disk-shaped recording medium which enables data to be written only in an erased area.
A first displaying a recording state of each area of the disc-shaped recording medium;
And a second management table for displaying an area in which data is to be recorded corresponding to the first management table. When a data write request is issued, the data is written to the requested area. If writing is not possible, the data is temporarily written in a writable alternative area, and the temporarily written area is used for the alternate use in a predetermined portion of the first management table indicating the area where the data is temporarily written. In addition to displaying a message indicating that the data is written, by writing data indicating an area where data is to be recorded properly in a predetermined portion of the second management table corresponding to the first management table, a data write request is issued. Data writing is performed immediately based on the first management table and the second management table when there is an error. Rewriting data to the written region became possible to speed.

Therefore, a high-speed recording operation can always be performed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of a recording control apparatus for a disk-shaped recording medium and a data recording method for a magneto-optical disk apparatus according to the present invention will be described below in detail with reference to the drawings. FIG.
FIG. 2 is a block diagram showing a specific example of a magneto-optical disk device according to the present invention. FIG. 2 is a diagram for explaining states of tables when data is written, data is deleted, and data is replaced.
FIGS. 3, 4 and 5 are flow charts showing the operation of the present invention. In these figures, the recording control device for a disk-shaped recording medium which enables writing of data only in an erased area is described. A first management table for displaying a recording state of each area of the recording medium, and a second management table for displaying an area in which data is to be recorded corresponding to the first management table; When a data write request is made and the data cannot be written to the requested area, the data is temporarily written to a writable alternative area and the first data indicating the area to which the data was temporarily written. In a predetermined portion of the management table 6, an indication that the temporarily written area is an alternative use is displayed, and the first
The second management table 7 corresponding to the management table 6 of FIG.
By writing data indicating an area where data is to be recorded properly in a predetermined portion, when there is a data write request, the first management table 6 and the second management table 7 are written.
A recording control device for a disk-shaped recording medium configured to immediately execute data writing based on the above is shown.

Next, specific examples of the present invention will be described in detail with reference to the drawings. 1, a magneto-optical disk drive according to the present invention includes a spindle motor 4 for rotating a magneto-optical disk 1, an optical pickup 2 for reading and writing data from and to the magneto-optical disk 1, and a read-out from the optical pickup 2. And a sector detection / data extraction circuit 14 for separating the disc sector number and actual data from the output from the waveform shaping circuit 3.
An external magnetic field generator 11 for generating a magnetic field when writing data to the magneto-optical disk 1;
A data write control circuit 10 for controlling the optical pickup 2 based on a command from a controller 5 for controlling the entire apparatus and recording data on the magneto-optical disk 1, an optical pickup 2 and a spindle motor 4 according to a command from the controller 5 And a host interface 9.

The host interface 9 matches a signal level and a format for connecting the magneto-optical disk drive to a host computer (not shown). Further, the controller 5 performs sector detection /
The control for handling data from the data extraction circuit 14 and the host interface 9 on the magneto-optical disk 1 is performed.

Under the control of the controller 5, the operations of the sector status table 6, which is the first management table, the sector replacement table 7, which is the second management table, and the idle monitoring timer 8, operate as follows. The sector status table 6 divides the usage status of the sector of the magneto-optical disk 1 into “in use”, “erased”, “unused and unerased”, and “alternately used”. It is stored in the management table 6.

Since the sector to be written is in use when a write request is generated, the sector replacement table 7 holds the value of the sector to be written normally when another sector is temporarily used as a replacement. doing. Idle monitoring timer 8
Monitors the time since the communication with the host computer is stopped. If there is no communication with the host computer for a predetermined time set in advance, the controller 5 determines that the free time is entered, and Start processing.

The operation of the magneto-optical disk drive of the present invention configured as described above will be described with reference to FIGS. In the following description, it is assumed that a data operation command has been issued for the second position on the disk in FIG. As shown in FIG. 2A, at the time of writing, when a write command is given from the host computer from the host interface 9, the sector status table 6 under the control of the controller 5 is searched, and the sector is referred to as "erased ( In the case of writing to a location of "indicated by E in FIG. 2)", the value of the sector status table 6 is rewritten to "in use (indicated by U in FIG. 2)" and data is written.

Next, the controller 5 issues a command to the optical pickup 2 via the data write control circuit 10 and the mechanism control circuit 12, and executes a write command from the host computer. Thereafter, the controller 5 controls the mechanism control circuit 12,
“Verify” is performed by reading data using the optical pickup 2, the waveform shaping circuit 3, and the sector detection / data extraction circuit 14, and if it is normal, the completion of writing is notified to the host computer through the host interface 9.

As shown in FIG. 2B, when data is erased, an erasure command is given from the host computer via the host interface 9. that time,
After rewriting the corresponding position of the sector status table 6 under the control of the controller 5 to “unused and unerased (indicated by X in FIG. 2)”, the host computer then terminates the erasing via the host interface 9. Notify.

On the other hand, in order to perform processing during idle time, the idle monitoring timer 8 under the control of the controller 5
The time from completion of the command from the host interface 9 is constantly monitored. Then, when there is no exchange of information with the host computer for a predetermined time, the controller 5 determines that a free time state has been entered, and performs the following free time processing.

In this process, first, the sector status table 6 is searched to check the sectors that are "unused and not erased (marked by X in FIG. 2)". If found, the value of the sector state table 6 is set to “erased (displayed as E)”, and the controller 5 issues a command to the optical pickup 2 via the data write control circuit 10 and the mechanism control circuit 12. Perform erasure processing. In this manner, all the searches of the sector status table 6 are performed, and the “unused and unerased (×)” sector is changed to the “erased (E)” sector (see FIG. 5).

As shown in FIG. 2C, when data is to be replaced, the controller 5 issues a request to write the second data from the left of the magneto-optical disk 1 (this area is referred to as a sector N). Upon receipt, since sector N is not in the erased state ("in use (indicated as U)" in FIG. 2c), an erased sector is searched for temporary writing.

At this time, the identification code X indicating "unerased sector" is added to the portion indicating the sector N in the sector status table 6 for managing the recording status of each area of the magneto-optical disk 1.
And an identification code Y indicating an "alternate use" sector is entered in a portion indicating a temporarily writable sector (third area from the left in FIG. 2c) obtained as a result of the search. Further, a sector number to be recorded in a predetermined part of the sector replacement table 7 indicating a replacement area in which data is to be recorded corresponding to the sector status table 6 (in the case of FIG. Is recorded, and 2) is recorded), predetermined data is recorded in the substitute area, and the recording operation is completed after the verification.

In the free time process in this case, the sector status table 6 is searched to check the "alternative use (indicated by Y in FIG. 2)" sector. If found, the sector value of the sector replacement table 7 is read to detect the sector to be written. And the sector N to be written
Since the sector status table 6 is currently an "unerased (x)" sector, the corresponding portion of the sector status table 6 is rewritten as an "erased (E)" sector, and the sector is erased.

Further, in order to record the data recorded in the substitute sector in a predetermined sector, the "alternate use (Y)" sector in the sector status table 6 is displayed as "unused and unerased (x)" sector. The data of the sector that has been used alternately is transferred to the sector that has requested, and the identification code (U) indicating the “used” sector is entered in the second table from the left of the sector status table.

Then, the sector replacement table is returned to a state in which it has been properly recorded, and finally verification is performed to complete the recording operation. Thus, the sector status table 6
The erasing operation of the sector indicated by (x) and the recording operation of transferring the alternative recording to the normal sector are performed as long as the idle time condition continues. When a command from the host computer is received from the host computer through the host interface 9 during the processing in the idle time state, the controller 5
Performs processing up to the point where no inconsistency occurs between the magneto-optical disk 1, the sector status table 6 and the sector replacement table 7, and then terminates the processing during the idle time, and executes a processing request from the host computer. .

FIG. 3 is a flowchart showing a flow from a write request to an alternative write.
When a write request to the sector N of the magneto-optical disk 1 is issued (step S1), when the sector N is not in the erased state, an erased sector is searched for temporary writing (steps S2 to S4). An identification code (X) indicating an unerased sector is inserted into a portion indicating a sector N of a sector status table 6 for managing a recording status of each area of the magneto-optical disk 1, and searched in steps S2 to S4. An identification code (Y) indicating the use of the alternative is entered in the portion indicating the sector (step S5), and the sector number of the alternative use is recorded in a predetermined portion of the sector replacement table 7 corresponding to the sector status table 6 (step S6). Then, temporary alternative writing is performed (step S7), the recording state is confirmed, and the alternative recording is terminated (step S8).

FIG. 4 is a flowchart of a free time process for writing data of a sector which has been written alternately to a predetermined sector.
The code (E) indicating the "erased" sector is inserted into the portion indicating the sector N of the sector N, and the sector N is erased (steps S11 and S12). Next, in order to transfer the data recorded in the alternate use sector to the sector N, the identification code (Y) of the “alternate use” sector on the second management table is changed to the code of the “unused and unerased” sector ( X), the identification code (E) of the sector N is changed to an identification code (U) indicating a "busy" sector (step S13), and the sector number recorded in the sector replacement table 7 is replaced with a legitimate sector number. The state is returned (step S14), and data is moved to sector N (steps S15 and S16).

In the above description, the sector status table 6, the sector replacement table 7, and the idle monitoring time 8 are described as being inside the controller 5, but if under the control of the controller 5, the controller 5
May be provided outside. In the configuration of the above specific example, the sector status table 6 and the sector replacement table 7 are described as separate ones. However, the sector status table 6 and the sector replacement table 7 can be realized as one table that can hold these data.

If no "erased" sector is found at the time of data replacement, it is possible to perform the processing using the conventional "erasing", "writing", and "verify" processes without performing the processing during the free time. In the above-described writing process and replacement process, the order of rewriting the data in the first and second management tables 6 and 7 and erasing the data on the recording medium and writing the data may be any order if normal processing is performed. The processing may be performed in such an order.

[0031]

Since the recording control apparatus for a disk-shaped recording medium according to the present invention is constructed as described above, when a write request is issued, data is written immediately without executing erasure processing. As a result, high-speed write processing has become possible.

[Brief description of the drawings]

FIG. 1 is a block diagram of a magneto-optical disk drive according to the present invention.

FIG. 2 is a diagram showing a recording state of a sector status table and a sector replacement table according to the present invention.

FIG. 3 is a flowchart showing alternative recording according to the present invention.

FIG. 4 is a flowchart showing the flow of idle time processing.

FIG. 5 is a flowchart showing the flow of idle time processing.

FIG. 6 is a diagram illustrating a conventional state of writing, deleting, and replacing data.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magneto-optical disk 2 Optical pickup 3 Waveform shaping circuit 4 Spindle motor 5 Controller 6 Sector status table 7 Sector replacement table 8 Idle monitoring timer 9 Host interface 10 Data write control 11 External magnetic field generator 12 Mechanism control circuit 14 Sector detection / extraction circuit

Claims (7)

(57) [Claims] 1. A recording control device for a disk-shaped recording medium on which data can be written , wherein a recording state of each area of the disk-shaped recording medium is displayed.
Management table, and a second management table for displaying an area in which data is to be recorded corresponding to the first management table
A first means for temporarily writing data in a writable alternative area when data cannot be written to the requested area when a data write request is issued; A second means for displaying in a predetermined portion of the first management table indicating that the temporarily written area is an alternative use, and a second management table corresponding to the first management table Write data indicating the area where data is to be recorded in a predetermined portion of the
When there is a data write request,
A recording control apparatus for a disk-shaped recording medium , wherein data is written to the writable alternative area immediately based on the first management table and the second management table. 2. A timer for monitoring idle time ,
The data written to the area is specified by the write request
And a fourth means for writing data to the area of the fourth area . When the timer counts a predetermined idle time, the fourth operation is performed using the first management table and the second management table.
2. The step of writing data written in an alternative area to a predetermined area where the write request has been issued.
A recording control device for a disk-shaped recording medium according to the above. 3. An identification code indicating one of an erased area, a used area, an unerased area, and an alternative used area is recorded in a portion of the first management table indicating a recording state of each area. 3. The recording control apparatus for a disk-shaped recording medium according to claim 1, wherein: 4. The recording control apparatus for a disk-shaped recording medium according to claim 1, wherein the disk-shaped recording medium is a magneto-optical disk. 5. A method for recording data in a magneto-optical disk device in which data can be written only in an erased area, wherein when a write request is made and data cannot be written in the requested area, writing is possible. By temporarily writing data to the alternative area, the data writing is immediately executed, and then the data written to the alternative area is written to the write request area at an idle time when there is no processing request. A data recording method for a magneto-optical disk device, characterized in that recording is speeded up. 6. A data recording method for a magneto-optical disk device, in which data can be written only in an erased area, a first step of requesting writing to a sector N of the magneto-optical disk; A second step of searching for an erased sector for performing temporary writing when is not in an erased state; and a first step of displaying a recorded state of each area of the magneto-optical disk.
Is inserted into the portion indicating the sector N of the management table of the first management table, and the identification code indicating the alternative use is inserted into the portion of the first management table indicating the sector found in the second step. A third step, a fourth step of recording a sector number N in a predetermined portion of the second management table corresponding to a portion of the first management table in which an area for alternative recording is displayed, 5. A method for recording data in a magneto-optical disk device, comprising: a fifth step of performing temporary alternative writing to the area for alternative recording using the management table of No. 2. 7. A sixth step of erasing a sector N, and an identification code indicating that the sector N has been erased is recorded in a portion indicating the sector N of the first management table, and A seventh step of recording an identification code indicating unerased in a substitute write sector portion of the management table, and an eighth step of recording data of the substitute recorded sector in a sector N. Item 6
Recording method of the magneto-optical disk device according to the above.