JP3402777B2 - Write-once information recording medium sector management method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] The present invention relates to a write-once information recording medium.
Random access drive that can be added in a write-once manner
The present invention relates to a sector management method for realizing the sector. [0002] BACKGROUND ART Conventionally, magnetism has been used as an information recording medium.
Floppy disk or hard disk
Optical information for recording and reproduction using light.
Information recording media (optical disks, optical cards, magneto-optical cards, etc.
Therefore, hereinafter, it is typically referred to as an “optical card”. ) Etc.
Have been. [0003] These information recording media, UNIX, MS
-DOS (registered trademark of Microsoft Corporation, USA) or Mac
For information processing devices such as
For software connection with operating system
In general, information in units of sectors is
Write to or read from the
It is performed interdependently. However, these sectors
Access to rewritable information processing media
Optical cards, especially those that cannot be erased
A write-once optical card with an information processing device as software
To connect, logical address and physical address correspond
And make sure that the content of the same logical address exists.
Light car to make it work as if it was also rewritten
Mechanical driver for card operation and writing / reading on optical card
Software driver to perform
You. Here, an example of the above mechanical driver is shown in FIG.
This will be briefly described with reference to FIG. The optical card 1 is
Mounted on the ridge 11 and driven by the driver 3
Using a moving voice coil motor (VCM) 2
To the optical system 6 in a direction perpendicular to the track on the card 1
To move relatively. The optical system 6 includes an objective lens 4
And the position of the objective lens 4 is moved by the driver 5
Actuator 12 and low power when reading
When writing the output, a light source 13 of high power output at the time of writing,
The polarization beam splitter 14, the optical sensor 7, and the optical sensor
The light receiving processing circuit 15 for processing the photoelectric conversion signal of the
The output of the optical sensor 7 to form a servo system.
Auto tracking signal (At)
(Af) and an information reproduction signal (Rf). one
On the other hand, for writing, an information transmission signal (TF) is supplied.
Have been. Then, the input / output terminal data is processed
Command and information for writing / reading to / from the optical card 1
MPU 8 for performing notification processing, and upper system of this MPU 8
And an information processing CPU 9. Information office
The control device shall include the above elements, and
The information processing system 16 shows the general concept. Next, regarding software drivers
explain. In this way, it is necessary to divide into mechanical type and soft type
There is no, but the conventional example of address management by driver
For this purpose, the logical / physical address correspondence information is stored in the sector management information.
For those who write and read on optical cards
There is a law. FIG. 9 is a schematic plan view showing an example of an optical card.
FIG. As shown in FIG.
Record / read target information and data as read area
Data consisting of data sectors as sector information
10 (101, 102, 103,... 10m) and manages sector information.
To write and read sector management information for
A management unit 20 (201, 202, 203,... 20n) is provided. This
When writing data to the sector information of the optical card 1 of
Write data in the A direction from the top of the optical card to the data section 10
From the lower part of the optical card 1 to the sector management unit 20.
Data management information is written in the B direction in a write-once manner. This place
In this case, each of the optical systems 6 is individually divided into two systems, or
However, one system may be used. This data section or section
The data management unit increases the recording density by
It may be composed of a magnetic recording area. The data section 10 includes a sector as sector information.
Write data sequentially and write at this time
The position is a physical address. Physical address is sector management
Located in part 20, starting from 1 and writing down due to write-once
All positions are included. The sector management unit 20 stores a sector data.
Data is sequentially recorded. The structure of conventional sector management information is shown in FIG.
Consists of logical and physical addresses
Is done. [0010] Here, for example, the total number of sectors of the optical card is 6
If less than 5,535 lines, each address is 2 bytes
Can be expressed by the binary code of
And the physical address are two bytes each, and one
Is 4 bytes. Next, the optical card is inserted into the information processing apparatus.
The outline of the driver's operation from the start to the discharge is shown in FIG.
This will be described with reference to the flowchart of FIG. In FIG. 5, an optical card is provided in the information processing apparatus.
If it is inserted and data processing is instructed, S501
Then, whether or not the optical card has been inserted is monitored. In step S501, it is determined that the optical card has been inserted.
If detected, the data is written in the storage area on the optical card in S502.
Reads all the contents of the sector management unit 20
Data management information is sequentially developed as media open,
Translation table for physical addresses to logical addresses (hereinafter
Below, referred to as an address conversion table).
Created in the work memory. At the same time, the last
The value of the physical address + 1 of the sector management information is the data part 1
Physical address to be written next corresponding to 0 (hereinafter, write address)
Only a physical address). When the address conversion table is created, the domain
The driver is capable of random sector access to optical cards
In step S503, the read / write access of the sector information to the optical card is performed.
Seth. Next, in step S504, the optical information is transmitted from the information processing apparatus.
If there is a request to discharge the sector management information in S505
Is written as described above, and in S506, the light
Eject the card from the information processing device and end the information processing.
You. Here, the conventional writing of sector information is performed.
FIG. 7 shows a flowchart of the writing operation procedure process.
I will tell. If there is a write request to the optical card, S701
The sector data corresponding to the write physical address.
Write to the last position of the data section 20.
To update the write physical address. In S702
Checks whether writing has been performed correctly and writes
If the reading is not correctly performed, the process returns to S701. This place
In this case, the number of returns is counted and a write retry
If writing is not performed correctly even after performing the specified number of times,
As a write error, it indicates that writing is not possible, etc.
Or processing such as ejecting the optical card from the information processing device.
In some cases. If the writing has been performed correctly, S703
The logical address in the sector management information in the work memory
Set the value and the physical address value at which writing was performed normally.
Then, new sector management information is created. S704 at the same time
Address conversion table in the work memory of the information processing device
Update the file. In contrast to this write operation, the conventional read operation
The operation procedure will be described with reference to the flowchart of FIG.
You. Inserting an optical card into the information processing device,
The process of reading the contents stored in the memory is started. S8
01, based on the address conversion table, the logical address
Information is written to any physical address on the optical card.
To obtain the target physical address. Desired physics
If the address cannot be obtained, a read error has occurred in S805.
Read error processing. Get the desired physical address
If obtained, the physical address detected in S802
The data section of the data section 10 is specified according to the
The target sector data is read from the data section 10. S803
If reading is not performed normally at
If you still cannot read,
Error processing. Sector data read successfully
If the sector data has been
The device processes the data and proceeds to the next step.
The data is transferred and various processes are performed. [0020] SUMMARY OF THE INVENTION
In such a conventional example, each time one sector is written,
Must have at least 4-byte sector management information.
The number of written sector information increases
As a result, the sector management information also increases. For example, 1
1 Mbyte for sector type with 512 bytes capacity
When writing data of 2000 sectors, writing of 2000 sectors is
To be performed, the sector management information is 4 bytes x 2000 sectors.
8K bytes of sector management information is created unconditionally
Will be done. This means that the total recording capacity of the sector data is
In addition to the decrease, the logical / physical
Causes that also increase the initial operation time for dress development processing
become. [0022] The present invention solves the above disadvantages.
Information of the information processing system
Recording sector information from the processing device onto the write-once information recording medium,
Or, when playback is instructed, the sector data recorded on the recording
Recordable information recording that manages data with sector management information
A medium sector management method, wherein the sector management information is information
Record the logical address value specified by the processing system.
Physical address value indicating the position on the recording medium of the sector data
And consecutive writing of logical addressesaddressNumber (continuous
Number), and the information processing system
When instructed to record information, the previous information processing system
Detects the logical address recorded by the instruction from
If a logical address is specified, write at least
OnlyaddressUpdate the number to change the sector management information,
If no address is found, the indicated logical address
Value, physical address value indicating recording position, and writeAd
responseBy setting the number to the initial value, the sector management information
Is newly generated. The recording medium has at least a data part.
There are two areas with the sector management unit and at least
The data section is characterized by being added sequentially.
I do. Further, the data section is constituted by an optical recording area.
It is characterized by being performed. Further, the sector management section is constituted by an optical recording area.
It is characterized by being performed. Further, the sector management unit is an IC memory.
It is characterized by comprising. In addition, the sector management unit is a magnetic stripe.
It is characterized by comprising. In addition, the recording medium is an optical card.
And features. In addition, the sector management information can be rewritten.
When the ejection request of the recording medium occurs,
Or the memory provided for sector management information has become full
At the time, or at the
Recording in the sector management unit of the recording medium.
You. In addition, when the insertion of the recording medium is detected,
Read all sector management information, and
Based on the logical address / physical address conversion table and
A final write physical address is calculated. Further, a logical address / physical address
Calculate and specify the remaining capacity of the recording medium when creating the conversion table
When it is less than the capacity, it operates as write-protect
It is characterized by. In addition, an unwritten logical address
The feature is that no error is returned for the read request of
And In addition, a write-once information recording is performed from the information processing system.
Instructed to record or reproduce sector information on the recording medium,
The sector recorded on the recording medium is managed by the sector management information.
In the write-once information recording medium sector management method,
The recording medium includes at least the information processing system
The designated logical address value and the record of the recorded sector are recorded.
A physical address value indicating a recording position on a recording medium;
Continuous writing of addressesaddressNumber and is recorded
The recording of sector information is instructed by the information processing system.
When indicated, the information processing system
If the previously recorded logical address is detected,
And write at least said informationAddress
SThe sector management information by updating the
If the recorded logical address cannot be detected, the logical address
Address value, the physical address value, and the writeAddress
SBy setting the number and the initial value, the sector management
It is characterized in that information is newly generated. [0034] Therefore, the write-once information recording medium sector pipe according to the present invention is provided.
The management method is that the sector management information is instructed from the information processing system.
The indicated logical address value and the recorded sector data
Physical address value indicating the position on the recording medium and logical address
Continuous writing ofaddressInformation processing.
When recording of sector information is instructed by the management system,
If the previously recorded logical address is detected,
Also said the writingaddressUpdate the number and sector management information
To prevent the previously recorded logical address from being detected.
If so, the indicated logical address value and the record
A physical address value indicating a position and the writeaddressnumber
By setting the sector management information to the initial value.
That act to maintain the behavior of generating
It is. The recording medium has at least a data part.
There are two areas with the sector management unit and at least
The data section has the effect of being sequentially added.
Is what you do. Further, the data section is constituted by an optical recording area.
And acts to maintain the above operation. The sector management section comprises an optical recording area.
Thus, the above operation is maintained. Further, the sector management unit is an IC memory.
It is configured and acts to maintain the above operation.
You. In addition, the sector management unit is a magnetic stripe.
It is configured and acts to maintain the above operation.
You. In addition, the recording medium is an optical card,
It works to maintain the above operation. In addition, the sector management information can be rewritten.
When the ejection request of the recording medium occurs,
Or the memory provided for sector management information has become full
At the time, or at the
The recording operation is performed in the sector management section of the recording medium.
Is Umono. When the insertion of the recording medium is detected, all the sections are detected.
Data management information and read the logical address based on that information.
/ Physical address conversion table and final write physical address
Also works to maintain the operation of calculating the
It is. Further, a logical address / physical address
Calculate the remaining capacity of the recording medium when creating the conversion table,
If the remaining capacity of the
In order to maintain the operation of In addition, an unwritten logical address
Of not returning an error in response to a read request
Is what you do. Also, a write-once information recording is performed from the information processing system.
Instructed to record or reproduce sector information on the recording medium,
The sector recorded on the recording medium is managed by the sector management information.
In the write-once information recording medium sector management method,
The recording medium contains instructions from at least the information processing system.
Logical address and the recorded sector on the recording medium
Consecutive of the physical address indicating the recording position and the logical address
WritingaddressNumber and recorded information processing system
When the recording of sector information is instructed by the
The logical address recorded before the current instruction by the system
Is detected, sector information is written and at least
Also writeaddressUpdate the number and change the sector management information
If the previously recorded logical address cannot be detected,
Logical address value, physical address value, and writeAddress
SBy setting the number and the initial value, the sector management information
Acts to maintain the behavior of generating a new
Things. [0046] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described in detail. In this embodiment, the total number of optical cards as recording media
Although it is not necessary to limit the number of sectors,
When full, the address indicating the sector position is 2-byte binary
This is explained as a code. FIG. 1 is a block diagram showing the implementation of the sector management method of the present invention.
The write operation procedure is shown by a flowchart.
It is. FIG. 2 shows the structure of the sector management information of this embodiment.
As shown, the information processing system instructs to write
The logical address and the location of the data section on the card.
Write physical addresses and consecutive logical addresses
From the element of the number of continuous counters to be counted (continuous number)
In this case, each code is a 2-byte binary code. After the optical card is inserted, it is not ejected.
The outline of the operation of the driver is as shown in the flowchart of FIG.
In the same manner as described above, the recording medium
Perform detection. If an optical card is detected, the process proceeds to step S502.
The media open process described below is performed.
You. FIG. 3 shows the configuration of the address conversion table in the present embodiment.
Illustrated. Address conversion table is in the information processing system
Provided in the work memory of the driver
The offset value is proportional to the address value.
Is an array from which the value of the address can be extracted.
Corresponds to physical address 0 and 1 for logical address 0
And a one-to-two relationship, which includes the total section of the recording medium.
(Z) is secured for at least the number of terminals. Address translation table
All bulls are cleared to 0 at the same time as optical card insertion detection,
Each time an optical card is inserted, the address conversion card for that optical card is used.
Table is generated. In this embodiment, the physical address starts from 1.
And define the logical address in the address conversion table.
If the physical address indicated by the
It is determined that the sector is an embedded sector. From the inserted optical card, the sector management unit 20
Reads all the information written in the
Performs address expansion processing and creates an address conversion table
I do. At this time, the remaining capacity of the optical card is calculated.
If the remaining capacity is less than the specified capacity, write
Write by operating as a prohibited medium
The optical card becomes full on the way and unintentional data corruption
Destruction and data destruction can be prevented. The above-described media open processing is completed.
Then, the information processing device can read and write.
, Random write / read of sectors in S503
Will be able to perform random access. <Write> Refer to the flowchart of FIG.
The writing process to the optical card will be described. Insert the optical card into the information processing system,
Starts writing process in response to command from system
I do. The logical address to be written this time in S101 is
Checks whether the address is next to the written logical address
Confirm. If, for example, this optical card is inserted for the first time
If this is the first write, the previous logical address
Since there is no address, the process proceeds to S106,
Create new sector management information in the memory buffer.
The new sector management information is the logical address to be written from this time
And the write physical address are set in the continuous counter.
Sets 1. The logical address and the physical address are now
That is, the source and the number of times of writing are set to the initial values. Next, in S107, the sector data is
The writing to the unit 20 is executed. Further, in S108, the written sector data
Data is verified and sector data is written correctly.
If not, the process proceeds to S106 and the writing is repeated.
You. Although not shown, a so-called retry process
A step to count the number of repetitions
If this is done, monitor this number and repeat for the specified number of times.
Even if writing is not performed correctly, write
Error processing. In the case of this error, the information processing device
An error message is displayed on the display or the optical card is automatically
Or the information processing device was automatically turned off.
Error processing can be performed by various operations. In S108, the sector data is correctly written.
If it is, the new sector information is recorded in S105.
The offset is proportional to the logical address value.
In the array from which the value of the physical address can be extracted.
Updates an address translation table so that the write process
finish. On the other hand, the designated logical address is
In the case of the logical address next to the write address, the section
Write sector data, which is data information,
And the sector data is read in S103.
Verify. If written correctly,
Logical address of current and latest sector management information and its
Address and the number of times the continuous counter has been written.
Write up after counting up (S104). On the other hand, write
If the reading is not performed correctly, the process proceeds to S106 described above.
Process according to the process of creating new sector management information.
Do. Then, it counted up in S104.
Then, after that, new sector information was additionally recorded.
Then, the address conversion table is updated and written in S105.
Is completed. In this way, the next argument after the previous write
When writing the physical address, new sector management information
Instead of creating a
By updating, sector management information will be created
It is. Therefore, if there is a write request again,
From the physical address, physical address, and the number of writes,
Calculate the logical address for writing
From the address conversion table that also converts the number, the physical address
Calculate the sector data in the corresponding data section.
And then update the continuous counter to
Also updates the address translation table written to the memory
You. Thus, when writing sector information, the new
Write without writing a regular logical address or physical address
Only the number of times is written to the sector management unit 20 of the optical card.
As a result, the storage capacity of the sector
Do not add. In this case, the work memory of the information processing system
Updates the address translation table each time.
Work memory is a rewritable DRAM or SRAM
It is of course used, and it is of course
You. <Reading> Next, the reading operation of the optical card
The operation procedure will be described in detail with reference to FIG. The optical card is inserted into the information processing system,
Or, if writing / reading continuously,
Reading of sector information from the information processing system
Instructed to start the reading process. Optical card
The reading of the recorded sector information is performed in step S401.
Detected logical address, and detected logical address
From the address translation table as shown in FIG.
Obtain the value of the physical address corresponding to the logical address. logic
If the address cannot be detected or the obtained physical address
Is 0, it may be an unwritten logical address.
Therefore, in S406, the host system of the information processing system is determined.
The sector data from which the default value corresponding to the
Data, and in the next step S404, the pseudo data is set.
Output data. For example, as this pseudo data,
Data filled with null characters or data filled with FFH data.
Set the data etc. Therefore, when the logical address is 0,
Unwritten sector information such as when the logical address cannot be detected
Information read requests are not considered errors. Also, from the logical address to the logical address
Is the logical address / physical address
If the data is obtained from the data conversion table,
The sector data of the target physical address is read from the data unit 10.
And set. At this time, the reading result in S403
Check (verify) and retry the specified number of times
If the file cannot be read,
(S405), and the reading process ends. In step S404, the above system is
Output the sector data of the optical card.
The information reading process ends. In this way, the file created at the time of writing
The sector management information for the sector management information in the driver
Memory buffer is full and cannot be written
The optical card ejection request, etc.
When an event occurs, such as
Sector management when a certain time elapses
Store the data to that effect in the section 20 sequentially
Go. However, this optical card can no longer be used
However, it is better in terms of security than other processes are performed erroneously. The sector management information is rewritable.
It may be configured on a memory, and the IC
Moly and magnetic stripes may be used in combination. <Logical / Physical Address Expansion Processing>
When the optical card created by implementation is inserted again
The information written in the sector management unit 20 of the optical card is
Read sector management information from the top
Performs address expansion processing and sets the address conversion table to
Create like From the sector management information of the sector management unit 20,
Read physical address and physical address, and translate addresses
At an offset position proportional to the logical address value in the table
Set the physical address value. At this time, the continuous count
Is decremented to the next logical address until it becomes 0.
The physical address value of is set. As described above, in order from the head of the sector management information,
When all the sector management information is expanded,
Additional sector management information is overwritten on the address conversion table.
The latest address translation table is created. At the same time, the last logical address and physical
Referring to the address and the number of consecutive sector management information, Physical address + continuous counter Is calculated so that the final write to the data unit 10 is performed.
The physical address is obtained. Therefore, the optical card is inserted into the information processing system.
Clears the address translation table when
Has created an address conversion table for the optical card.
That's it. Also, the writing that is the number of this continuous counter
The number of write operations and the underlying logical and physical addresses.
If you can get it, you can create a new address translation table
I can do itmeaningI do. In this embodiment, the total number of sectors is 65,5.
The number is less than 35, but is not limited to this.
The address indicating the management information of the module has been converted to a 2-byte binary number.
Code, BCD code or character string code
And the like can be realized in arbitrary code units. In the above embodiment, a write-once optical card or the like is described.
Write on the recording medium according to the function of the information processing device
-Although the example of reading is shown, the present invention
Data management information is not limited to the above embodiment.
Of course, the present invention can be widely applied in some cases.
You. For example, this sector management unit is separated from the data unit.
With the IC memory and the work memory of the information processing system.
As an IC memory including an address conversion table
In addition, although recording capacity is small, magnetic storage
It may be composed of leipes. [0076] As described in detail above, according to the present invention,
The sector management method used by the actual operating system
Write requests are managed in block units.
To be executed at sequential logical addresses
Often. Therefore, when the present invention is implemented,
One sector management information is created for one block.
No matter how many sectors are written, block access
Can be managed with one sector management information.
Overall, the total recording capacity of sector data is increased,
Furthermore, even the initial operation time when a recording medium is inserted can be shortened.
It is. For example, according to the sector management method of the present invention, 1M
Even if data recording of bytes is performed,
Even if writing is divided into
Since only additional writing is performed, the sector management information is 1 k
Less than a byte. In the conventional example, always use 8 KB
Dramatically reduce sector management information compared to
be able to. This means that the capacity of the sector management information increases.
To prevent a decrease in the total storage capacity of sector data due to
In addition, logical / physical address expansion processing when a recording medium is inserted is performed.
The seek time, which is part of the initial operating time
be able to.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart showing a write operation procedure embodying the present invention. FIG. 2 is a conceptual diagram showing a structure of sector management information according to the present invention. FIG. 3 is a conceptual diagram showing an address conversion table according to the embodiment of the present invention. FIG. 4 is a flowchart showing a read operation procedure according to the present invention. FIG. 5 is a flowchart showing an outline of the operation of the driver of the optical card. FIG. 6 is a conceptual diagram showing a structure of conventional sector management information. FIG. 7 is a flowchart showing a conventional write operation procedure. FIG. 8 is a flowchart showing a conventional read operation procedure. FIG. 9 is a schematic plan view of an optical card according to the present invention. FIG. 10 is a conceptual diagram of an information processing apparatus using an optical card according to the present invention. [Description of Signs] 1 Optical card 2 Voice coil motor (VCM) 6 Optical system 8 MPU 10 Data section 20 Sector management section

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 20/12 G06F 3/06

Claims (1)

(57) [Claims] 1. An information processing system instructs to record or reproduce sector information on a write-once information recording medium, and manages the sector information recorded on the medium by using sector management information. In the write-once information recording medium sector management method, the sector management information includes at least a logical address value instructed by the information processing system, a physical address value indicating a recording position of the recorded sector information on a recording medium, wherein the write address count consecutive logical addresses, it is recorded, when instructed to record the sector information by the information processing system, logic subsequent to the logical address recorded in the last of the current instruction by said information processing system If an address is specified, at least the number of write addresses is updated to update the sector management information. And if the information processing system cannot detect the logical address recorded immediately before the current instruction, the logical address value, the physical address value, and the number of write addresses are set to initial values. A write-once type information recording medium sector management method characterized by the above-mentioned.