KR20060093924A - Information recording medium, recording/reproducing apparatus and recording/reproducing method - Google Patents

Abstract

Disclosed are an information storage medium, a recording / reproducing apparatus and a recording / reproducing method according to the present invention.

The recording apparatus according to the present invention includes a recording unit for recording data on an information storage medium, and a replacement for a replacement by a logical overwrite for updating the data recorded on the medium or a defect caused by the medium. And a control unit for arranging replacement data replacing original data in units smaller than the block unit in a recording block to be recorded for the recording block, and controlling the recording / reading unit to record the recording block on the medium. According to the present invention as described above, since the replacement operation indicating the replacement state of the unit smaller than the block unit, since the RMW process based on the replacement of the block unit is not required, the time taken for the replacement operation can be reduced as compared with the conventional art.

Description

Information recording medium, recording / reproducing apparatus and recording / reproducing method

1 is a reference diagram for explaining the replacement by a LOW or a defect according to the prior art,

2 is a reference diagram for explaining replacement of a block unit according to the prior art;

3 is a schematic diagram of a recording / reproducing apparatus according to the present invention;

4 is a detailed block diagram of the recording / reproducing apparatus shown in FIG. 3;

5 is a structural diagram of an information storage medium to which the present invention is applied;

6 is an example of a replacement entry according to the present invention;

7 is another example of a replacement entry in accordance with the present invention;

8A shows the format of the SDL entry of the DVD-RAM;

8B is an example of a format of a replacement entry according to the present invention in consideration of compatibility with the SDL entry shown in FIG. 8A;

9A is a reference diagram for explaining replacement of a block unit according to the present invention;

9B is an example of a replacement entry according to the replacement of the block unit shown in FIG. 9A,

10A is a reference diagram for explaining replacement of a sector unit according to the present invention;

10B is an example of a replacement entry according to the sector-by-sector replacement shown in FIG. 10A.

11 is a flowchart showing a process of a recording method according to the present invention;

12 is a flowchart illustrating a process of a reproduction method according to the present invention.

TECHNICAL FIELD The present invention relates to the field of discs, and more particularly, to an information storage medium, a recording / reproducing apparatus, and a recording / reproducing method, which make it possible to effectively handle replacement by a drive, including replacement by LOW or replacement by a defect. It is about.

The recording / reproducing unit used for recording / reproducing data on a medium in a drive system for an information storage medium and the recording / reproducing unit used for recording / reproducing in a file system or a recording / reproducing application are different. There are many. In a file system or a recording / reproducing application, the recording / reproducing unit is mainly one sector (2048 bytes), and the recording / reproducing unit used in the drive system is mainly one block composed of a plurality of sectors (for example, 16 * 2048 bytes or 32 * 2048 bytes).

On the other hand, a write once storage information storage medium has become available, which is impossible to overwrite data due to the property of being able to record only once, but a write once storage information logically overwrite has emerged. In other words, logical overwrite means that the data on the medium is overwritten by the linear replacement method of the drive system when a data write command is provided from the host to the area where data is already recorded on the medium or to be regarded as recorded. Substituting in the recording area and representing the replaced state with a replacement entry means managing.

As a result, there may be a replacement by logical overwrite, a replacement by a defect, and the like in the write-once medium, which will be briefly described with reference to FIG.

In the case of a rewritable information storage medium, a spare area is generally provided in a part of the data area for defect management. That is, when user data is recorded in the user data area (the area other than the spare area in the data area) or when a defect is found while reproducing the data recorded in the user data area, the replacement area for replacing the defective data is replaced with the spare area. Will be recorded.

In the case of a write-once recording medium, such a defect management method is used for LOW (Logical Overwrite). "Logical overwrite" is a method for enabling use similar to that in which rewriting is performed on a write-once information storage medium. That is, in order to update the data already recorded in the user data area, the recorded data is treated as if it is defective data, and data for replacing the recorded data is recorded in the unrecorded area. In this way, the logical address of the data recorded in the user data area is fixed, and the physical address corresponding to this logical address is used as the replacement data address. Only rewrites can be made to look like they have been done, facilitating management. This is because the host is only concerned with logical addresses.

1 is a reference diagram for explaining the replacement by LOW according to the prior art.

Referring to FIG. 1, the host attempts to update A1, A2, A3 to B1, B2, B3 by LOW while data blocks A1, A2, and A3 are already recorded in the physical spaces P1, P2, and P3 on the medium. Original Location When a write command is given to P1, P2 and P3, the drive system updates B1, B2 and B3 to P4, P5 and P6 in the user data area on the medium by replacement by LOW and the replaced state. In order to indicate that P1, P2, and P3 are replaced with P4, P5, and P6, create a replacement entry.

In the future, when the host issues a play command to a logical address corresponding to the original position to read data B1, B2, and B3, the drive system will play back the data recorded in P4, P5, P6 on the medium from the replacement entry and send it to the host. The same may be applied in the case of a defect. However, in the case of LOW, the replacement data is data for updating the original data, whereas in the case of a defect, the replacement data is only the data for removing the defect from the original data.

This logical overwrite is possible to logically overwrite all or some sectors of the block. By the way, conventionally, the replacement entry for defect management or LOW of the write-once recording information storage medium has its replacement unit composed of blocks. That is, even when only logically overwriting some sectors of a block, the entire block including the some sectors is replaced and the replaced state of the block is indicated in the replacement entry. In other words, even if only some sectors of the block are defective or logically overwritten because the replacement entry is a block unit, other sectors in the block including these sectors must be replaced. Therefore, the replacement time may be long due to the replacement by Read-Modify-Write that reproduces other sectors except for some sectors that actually need to be replaced and replaces them with some sectors that are actually replaced. This Read-Modify-Write (RMW) requires additional time to read the block compared to writing directly. That is, in an optical recording system using a disk-type medium, additional time is required for reproducing the data of the block after recognizing the address of the block by accessing the pickup where the block is recorded by servo control. Done. The additional time required due to this RMW causes the user to be inconvenient in using the media.

Also, although the N + M sectors to be actually replaced are less than or equal to one block, for example, as shown in FIG. 2, N sectors are arranged in the first block and M sectors are arranged in the second block. There may be a case. In such a case, when the last N sectors of the block and the M sectors of the next consecutive block are to be replaced at the same time, if a block unit is replaced, a block including one block and M sectors to replace the block including the N sectors is provided. There is a problem in that a total of two blocks are needed due to one block for replacing.

The present invention solves the above problems by implementing a sector-by-sector replacement for the drive replacement, including the replacement by the LOW or the replacement by the defect, thereby reducing the replacement time due to the RMW, and saves the capacity of the user data area It is an object of the present invention to provide an information storage medium, a recording / reproducing apparatus, and a recording / reproducing method, which can be used.

One feature of the present invention for solving the above problems is, in the information storage medium, for replacement by a logical overwrite for updating of data recorded on the medium or by a defect generated in the medium. In the recording block recorded for the replacement, replacement data for replacing the original data is arranged in units smaller than the block unit.

If the size of the replacement data is not a multiple of the size of the recording block, padding data is preferably arranged in the recording block.

A unit smaller than the block unit preferably represents a sector unit.

The replacement entry for containing information on the replacement preferably includes location information of one or more consecutively replaced sectors, location information of one or more consecutively replaced sectors, and information on the number of consecutively replaced sectors. The position information of the sectors to be replaced indicates the physical address of the first sector or the physical address of the last sector among the sectors to be replaced successively, and the position information of the sectors to be replaced indicates the physical address of the first sector among the sectors to be replaced successively. It is preferable to indicate the address or the physical address of the last sector. The information on the number of consecutively replaced sectors is preferably represented by "number of consecutively replaced sectors -1".

The replacement entry for containing information on the replacement preferably includes information indicating a replacement unit, location information of one or more consecutive replacement units, and location information of one or more consecutive replacement units. The location information of the replacement units to be replaced indicates the physical address of the first sector or the physical address of the last sector of the replacement units to be successively replaced, and the location information of the replacement units to be replaced is the first of the replacement units to be replaced successively. It is preferable to indicate the physical address of the first sector or the physical address of the last sector. Further, the information indicating the replacement unit preferably indicates whether the replacement unit is a block unit or a sector unit.

Preferably, the replacement entry further includes information about the number of replacement units replaced in succession.

The information on the number of consecutively replaced sectors is preferably represented by "number of consecutively replaced sectors -1".

According to another aspect of the present invention, there is provided a recording apparatus comprising: a recording unit for recording data on an information storage medium, and a replacement by a logical overwrite for updating of data recorded on the medium or a replacement by a defect generated in the medium. And a control unit for arranging replacement data replacing original data in units smaller than the block unit in the recording block to be recorded for the replacement, and controlling the recording unit to record the recording block on the medium.

Still another aspect of the present invention provides a reproducing apparatus, comprising: a reading unit for reading data from an information storage medium, a replacement by a logical overwrite for updating data recorded on the medium, or a defect caused by the medium. For replacement, the control unit may include a control unit which controls the reading unit to read from the medium a recording block in which replacement data is arranged in smaller units than block units.

The control unit may be configured to obtain a replacement entry including location information of one or more consecutively replaced sectors, location information of one or more consecutively replaced sectors, and information on the number of consecutively replaced sectors in order to obtain information regarding the replacement. Preferably, the readout is controlled to read from the medium.

Another aspect of the invention is a recording method, in which a recording is made for the replacement for replacement by a logical overwrite for updating of data recorded on an information storage medium or a replacement by a defect generated in the medium. And arranging replacement data replacing original data in blocks in units smaller than the block units, and recording the recording block on the medium.

Another feature of the present invention is a reproduction method, in which a replacement data is smaller than a block unit for replacement by a logical overwrite for updating of data recorded on an information storage medium or replacement by a defect generated in the medium. And reading the recording block arranged in units from the medium.

Another aspect of the present invention provides an information storage medium comprising: a replacement unit in recording block units for managing replacement by a logical overwrite for updating data recorded on the medium or replacement by a defect generated in the medium. Substitution entries having substitutive unit information indicating perception sector per unit are recorded in a predetermined area of the medium.

Another feature of the present invention is a recording apparatus, comprising: a recording unit for recording data on an information storage medium, and a replacement by a logical overwrite for updating of data recorded on the medium, or by a defect generated in the medium. And a control unit for generating a replacement entry having replacement unit information indicating whether a replacement unit is a recording block unit or a sector unit, and controlling the recording unit to record the replacement entry on the medium.

A still further aspect of the present invention is a playback apparatus comprising: a reading unit for reading data from an information storage medium, and a replacement caused by a logical overwrite for updating data recorded on the medium or a defect generated in the medium. And a control unit for controlling the reading unit to read a replacement entry having replacement unit information indicating whether a replacement unit is a recording block unit or a sector unit from the medium, in order to manage replacement.

Another aspect of the present invention provides a recording method, wherein in a recording method, a replacement unit is a recording block for managing replacement by a logical overwrite for updating of data recorded on an information storage medium or replacement by a defect generated in the medium. Generating a replacement entry having replacement unit information indicating whether the unit is a sector or a sector; and recording the generated replacement entry on the medium.

Another feature of the present invention is a reproducing method, in which, in a reproducing method, in order to manage replacement by logical overwriting for updating of data recorded on an information storage medium or replacement by a defect generated in the medium, the replacement unit is a recording block. Reading a replacement entry having replacement unit information indicating whether the unit is a sector or a sector unit from the medium, and reproducing the replacement data with reference to information about the replacement data contained in the read replacement entry; will be.

The present invention will now be described in detail with reference to the accompanying drawings.

3 is a schematic diagram of a recording / reproducing apparatus according to the present invention.

Referring to FIG. 3, the recording / reproducing apparatus 300 according to the present exemplary embodiment is a device capable of recording or reproducing, and includes a recording / reading unit 320 and a control unit 310. The recording / reading unit 320 records data on the disk 500, which is an information storage medium according to the present embodiment, under the control of the controller 310, and reads the data to reproduce the recorded data. The controller 310 controls the recording / reading unit 320 to record data in a predetermined recording unit block or processes the data read by the recording / reading unit 320 to obtain valid data according to the present invention.

In recording, the controller 310 controls the write / read unit 320 to record data by implementing logical overwrite (LOW), in particular according to the command of the host or under the control of the drive system itself in accordance with the present invention. In particular, the control unit 310 according to the present invention is a unit in which data is recorded on the disk when replacing by a logical overwrite for updating the data recorded on the disk 500 or by a defect generated in the medium. Replacement is performed in units smaller than the recording block unit, and a replacement entry is generated to manage the replacement state performed in units smaller than this recording block unit. The unit smaller than the block unit is preferably a sector unit.

FIG. 4 is a detailed block diagram of the recording / reproducing apparatus shown in FIG. 3.

Referring to FIG. 4, the disc drive includes a pickup as the recording / reading unit 320. The disk 500 is mounted to the pickup. The disk drive also includes a host I / F 311, a DSP 312, an RF AMP 313, a servo 314, and a system controller 315 as the controller 310.

In writing, the host I / F 311 receives a write command together with data to be written from the host 340 and logical address information of the data to be written, and sends it to the system controller 315.

The system controller 315 receives a write command from the host I / F 311 and performs initialization required for writing.

In particular, according to the present invention, the system controller 315 needs to perform a logical overwrite if the original sectors according to the write command are related to the part where the data has already been written, so that the write block includes replacement sectors replacing these original sectors. Create In this case, since the system controller 315 implements a sector-by-sector replacement or a unit smaller than the recording block, the system controller 315 generates a recording block including replacement sectors immediately without having to read a block including the original sectors from the disk. . If the replacement sectors do not fill all of one recording block, the remaining part is filled with padding sectors in which a predetermined value is recorded. In addition, the system controller 315 generates a replacement entry for managing a state regarding replacement of such a sector unit or replacement of a unit smaller than that of a recording block. The replacement entry may include information about the original sector, information about the replacement sector, the number of replacement sectors successively replaced, information in a replacement unit, and the like. The information of the replacement unit may indicate whether the replacement unit is a block unit or a sector unit, and the replacement entry may be implemented in a block unit or a sector unit through such replacement unit information.

The DSP 312 adds additional data such as parity for error correction to the data to be recorded received from the host I / F 311 and performs ECC encoding to generate an ECC block, which is an error correction block, and then, in a predetermined manner. Modulate. The RF AMP 213 converts the data output from the DSP 312 into an RF signal. The pickup writes the RF signal output from the RF AMP 313 to the disk 330. The servo 314 receives a command required for servo control from the system controller 315 to servo control the pickup 350.

During playback, the host I / F 311 receives a playback command from the host 340. The system controller 315 performs initialization required for regeneration.

In particular, in accordance with the present invention, upon receiving a playback command for the original sectors, the system controller 315 confirms the information about the replacement sector from the replacement entry for this original sector. The system controller 315 may know from this replacement entry whether the replacement unit is a block unit or a sector unit, and may know the number of replacement sectors successively replaced, the position of the replacement sector, and the position of the original sector. From this replacement entry information, the system controller 315 controls the write / read section to read a block containing the replacement sector from the disc. The DSP 312 is then controlled to error correct the block read from the disk. The host I / F 311 is controlled to transmit the error corrected data to the host.

The pickup outputs an optical signal obtained by irradiating a laser beam to the disk 500 and receiving a laser beam reflected from the disk 500. The RF AMP 313 converts the optical signal output from the pickup 350 into an RF signal and provides modulated data obtained from the RF signal to the DSP 312, while providing a servo signal for control obtained from the RF signal. To provide. The DSP 312 demodulates the modulated data and outputs the data obtained through ECC error correction.

On the other hand, the servo 314 receives the servo signal received from the RF AMP 313 and the command required for the servo control received from the system controller 315 to perform servo control for the pickup. The host I / F 311 sends data received from the DSP 312 to the host 340.

5 is an example of a structural diagram of an information storage medium to which an alternative method according to the present invention is applied.

Referring to FIG. 5, a data structure recorded on the write once storage information medium 500 includes a lead-in area 510, a data area 520, and a lead-out area 530.

The lead-in area 510 includes a disc management area 511 as an area in which information about a disc and the like are recorded. In the disc management area 511, final disc management information is recorded when this disc is finalized. Although the disk management area is provided in the lead-in area in FIG. 5, it may be provided in the lead-out area or may be provided in plural for reliable storage of data.

The user data area 520 is an area for recording user data. The user data is recorded in the user data area 520, and according to the present invention, the replacement data by LOW for updating the already recorded user data or the replacement of the defective data when a defect occurs in the already recorded user data Alternative data is recorded.

In particular, the user data area 520 may be provided with a temporary disk management area 521 for storing temporary defect information for managing replacement by LOW or replacement by a defect. The temporary defect information includes position information of the defect data and position information of the replacement data replacing the defect data. In particular, in accordance with the present invention, the temporary defect information includes a replacement entry for indicating a replacement status due to a defect occurrence or a replacement status due to LOW. In particular, such replacement entries are written in a format for indicating a replacement state in sector units or a replacement state in units smaller than a write block unit according to the present invention. Although the temporary disk management area 521 is illustrated in the example of FIG. 5 as being provided in the user data area, the temporary disk management area 521 may be provided in the lead-in area or the lead-out area.

6 shows an example of a replacement entry according to the present invention.

Referring to FIG. 6, the replacement entry 600 includes a first PSN 610 of an original sector, a number of replacement units 620, and a first PSN 630 of a replacement sector.

The first PSN 610 of the original sector indicates the address of the first sector among the sectors to be successively replaced. The physical sector number (PSN) represents a physical sector number, but is not limited thereto, and may be address information that may represent sectors to be continuously replaced in any way.

The number of replacement units 620 represents the number of sectors replaced in succession. The number of such replacement units may be expressed as "number of consecutively replaced sectors-1". When the number of replacement units is defined as "number of consecutively replaced sectors-1", if the number of replacement units 620 indicates "0", this indicates that the number of consecutively replaced sectors is one, which is continuous Indicates a single replacement rather than a replacement. In addition, when the number of replacement units is defined as "the number of consecutively replaced sectors-1", when the number of replacement units 620 is a value other than "0", this may indicate continuous replacement.

The first PSN 630 of the replacement sector indicates the address of the first sector among consecutively replaced sectors. The physical sector number (PSN) represents a physical sector number, but is not necessarily limited thereto, and may be address information that may represent sectors that are successively replaced in any way.

7 shows another example of a replacement entry according to the invention.

Referring to FIG. 7, the replacement entry 700 includes replacement unit information 710, a first PSN 720 of the original sector, a number of replacement units 730, and a first PSN 740 of the replacement sector.

The replacement unit information 710 indicates the replacement unit indicated by this replacement entry, and may indicate whether the replacement unit indicates a sector unit replacement or a block unit replacement. The replacement unit that can be represented by this replacement entry will generally be a sector unit or a block unit, but is not limited thereto. That is, the unit smaller than the block unit is not necessarily limited to the sector unit, and the name may be applied to the sector unit applied in the present invention as long as the unit is smaller than the block unit.

The first PSN 720 of the original sector indicates the address of the first sector among the sectors to be successively replaced. The physical sector number (PSN) represents a physical sector number, but is not limited thereto, and may be address information that may represent sectors to be continuously replaced in any way.

The number of replacement units 730 represents the number of replacement units replaced in succession. If this replacement entry represents a block unit in the replacement unit information 710, the number of replacement units 730 represents the number of blocks replaced in succession, and if this replacement entry represents a sector unit in the replacement unit information 710. The number of replacement units 730 represents the number of sectors replaced in succession. The number of such replacement units may be expressed as "number of consecutive replacement units-1". If the number of replacement units 730 indicates "0" when the number of replacement units is defined as "the number of consecutive replacement units-1", this indicates that the number of replacement units replaced continuously is one, This indicates that it is a single replacement rather than a continuous replacement. In addition, when the number of replacement units is defined as "number of consecutive replacement units-1", when the number of replacement units 730 is a value other than "0", this may indicate that the replacement is continuous. Of course, it can be expressed as "the number of consecutive replacement units" as the number of such replacement units.

The first PSN 740 of the replacement sector indicates the address of the first sector among consecutively replaced sectors. The physical sector number (PSN) represents a physical sector number, but is not necessarily limited thereto, and may be address information that may represent sectors that are successively replaced in any way.

In the example shown in FIG. 6 or 7, the " first PSN of the original sector, the number of replacement units, the first PSN of the replacement sector " is information for identifying the position and the size of blocks or sectors that are successively replaced. In this case, as shown in FIG. 6 and FIG. 7, the present invention is not limited only to the start address and the number of consecutive replacement sectors or blocks. For example, the position and size of consecutive replacement sectors or blocks may also be indicated by the last address and number information of the replacement sectors or blocks.

In the replacement entry as shown in FIG. 6, if one block is composed of 16 sectors, and the "number of replacement units" is composed of 8 bits, the total replacement status of 256 consecutive sectors, that is, 16 consecutive blocks is determined. It can be represented by one replacement entry.

However, if one bit is allocated to the replacement unit information 710 as shown in FIG. 7 under the same conditions to distinguish whether a block unit replacement or a sector unit replacement is performed, the " number of replacement units " Is 128. Therefore, if the replacement unit represents a sector, up to 128 sectors can be represented, so the number of sectors that can be displayed in succession is reduced. However, if the replacement unit represents a block, up to 128 blocks can be represented, The number of blocks that can be increased by eight times. As such, the alternate entry format of FIG. 6 and the alternate entry format of FIG. 7 have advantages and disadvantages.

The DVD-RAM has an SDL entry format composed of 8 bytes as shown in FIG. 8A. In consideration of compatibility with the Secondary Defect List (SDL) entry format, an alternative entry format according to the present invention is shown in FIG. 8B. Can be represented as:

8A shows the format of the SDL entry of the DVD-RAM.

Referring to FIG. 8A, b0 to b23 represent sector numbers of the first sector of the replacement block, b24 to b31 are reserved fields, b32 to b55 represent sector numbers of the first sector of the defective block, and b56 to b61 A reserved field, b62 represents a status of linear replacement (SLR) indicating whether a defective block has been replaced with a spare block, and b63 is a reserved field.

8B shows an example of a format of a replacement entry according to the present invention in consideration of compatibility with the SDL entry shown in FIG. 8A.

Referring to FIG. 8B, the alternate entry format 800 includes the first PSN 850 of the replacement sector, b0 through b23, the number of replacement units 840 through b24, and the first PSN 830 through b55 of the original sector in b32. ), b62 to b62 indicate a reservation field 820 and b63 indicates a replacement unit 810.

Since the number of replacement units 840 and replacement units 810 is shown by using the reserved area provided in the replacement entry of the DVD-RAM shown in FIG. 8A, the replacement entry according to the present invention shown in FIG. 8B is shown in FIG. 8A. Can be compatible with the replacement entry of the DVD-RAM. In FIG. 8B, the SLR (bit 62) of FIG. 8A may be further provided. 8B, when the replacement unit 810 = 0b indicates that the replacement of the block unit is performed, and the replacement unit 810 = 1b indicates the replacement of the sector unit, the replacement unit 810 = 0b and a single replacement block Case 8b is the same as FIG. 8a. That is, FIG. 8B is an alternative entry format including the alternative entry format shown in FIG. 8A. This ensures maximum compatibility with the SDL entry format of DVD-RAM.

9A is a reference diagram for explaining replacement of a block unit according to the present invention.

9A, N blocks to be replaced are indicated on the disk before replacement. The physical address of the first sector of the first block of the N consecutive original blocks to be replaced is indicated by Pa.

After replacement, it is indicated that N original blocks are replaced with N consecutive replacement blocks. The physical address of the first sector of the first block of the N replacement blocks is denoted by Ra.

FIG. 9B shows an example of a replacement entry according to the replacement of the block unit shown in FIG. 9A.

Referring to FIG. 9B, in order to indicate that the replacement unit is a block, the replacement entry 900 is set to information indicating that the replacement unit 910 is "BLOCK", and the first PSN 920 of the original sector is "Pa". The first PSN 940 of the replacement sector is set to " Ra " and the number of replacement units 930 = " N-1 ". This allows future drive systems to refer to this replacement entry and view the value set in each field of the replacement entry to determine its replacement status.

10A is a reference diagram for explaining replacement of a sector unit according to the present invention.

10A, N sectors to be replaced are indicated on the disk before replacement. The physical address of the first of the N consecutive original sectors to be replaced is indicated by Pa.

After replacement, it is indicated that N original sectors are replaced by N consecutive replacement sectors. The physical address of the first of the N replacement sectors is denoted by Ra.

FIG. 10B shows an example of a replacement entry according to the sector-by-sector replacement shown in FIG. 10A.

Referring to FIG. 10B, in order to indicate that the replacement unit is a sector, the replacement entry 1000 is set to information indicating that the replacement unit 1010 is "SECTOR", and the first PSN 1020 of the original sector is "Pa". The first PSN 1040 of the replacement sector is set to " Ra ", the number of replacement units 1030 = " N-1 ". This allows future drive systems to refer to this replacement entry and view the value set in each field of the replacement entry to determine its replacement status.

Meanwhile, in FIG. 10A, padding sectors refer to sectors added by the drive with a value equal to 00h to make a multiple of a block, which is a recording unit of the drive, when the size of N replacement sectors is not a multiple of a block. If the total size of the N sectors is a multiple of the block, then the padding sector is not necessary.

As described above, in the case of performing the replacement on a sector-by-sector basis, the time taken for the replacement operation can be saved and the loss of the capacity of the user data area can be prevented.

Conventionally, since a replacement entry indicates its replacement state in units of blocks, which are recording / reproducing units of the drive system, it is necessary to include some sectors A to be replaced when it is desired to replace some sectors A of blocks rather than all of the blocks. The block was read from the disc (Read), only the sectors A to be replaced in the block (Modify) were changed, and the block was written back to the replacement position. In the future, when the host wants to play another sector B of the block including the partial sector A, the drive system indicates that the sector has already been replaced by the replacement block by the replacement entry. Will play that sector B. As such, block-by-block replacement is inevitable for the replacement of not only some sectors A of the block to be replaced but also other sectors B in the block. This resulted in the RMW process when replacing some sectors but not all of the blocks, which increased the time required for the replacement process.

However, according to the present invention, due to the replacement entry indicating the replacement state in the sector unit, even if it is intended to replace some sectors rather than the entire block, the RMW process is not required. This can reduce the time taken for the replacement operation compared to the conventional. In addition, conventionally, if a last fixed sector of a block and the first predetermined sector of a next block are replaced by a block unit, two blocks are required. However, in the case of substituting sector by sector and indicating the substituting state of a sector-entry entry as in the present invention, if the size according to the number of sectors to be actually replaced is smaller than or equal to one block size, the number of blocks required for replacement is One block is enough. This can prevent the loss of user data area capacity due to block-by-block replacement.

11 is a flowchart showing the procedure of the recording method according to the present invention.

Referring to FIG. 11, the drive system receives 1110 a write command for N original sectors from a host.

Then, the drive system generates a write block including a replacement sector part and a padding sector part composed of N replacement sectors replacing N original sectors (1120). According to the present invention, the drive system does not need to read the recording block containing the original sectors from the disk even if the sectors to be replaced are not filled by the size of the recording block. That is, since sector-by-sector replacement is possible, a recording block including replacement sectors may be generated. If the amount of sectors to be replaced cannot fill the size of the recording block, the rest of the recording block is filled with padding sectors. Even though the replacement unit is a sector unit, the unit to be recorded on the disk is a recording block unit, so the remaining portions other than the replacement sectors are filled with a predetermined value (padding sector) determined by the drive system.

The recording block thus generated is recorded in the unrecorded area of the disc (1130).

Next, the drive system generates a replacement entry including information about the original sector and information about the replacement sector and writes it to the disk (1140). The replacement entry may be represented by information on the position of the original sector, information on the position of the replacement sector, and information on the number of sectors successively replaced, as shown in FIG. 6 or 7.

12 is a flowchart illustrating a process of a reproduction method according to the present invention.

Referring to FIG. 12, the drive system receives 1210 a play command for N original sectors.

The drive system then checks 1220 the replacement entry rotor replacement sector for the original sector. The replacement entry is recorded in a predetermined area of the disk, and the drive system reads the replacement entry from the disk and stores it in the memory, and when the recording command or the playback command comes from the host, the replacement status of the data according to the recording command or the playback command You can retrieve the replacement entries stored in memory to verify that.

The drive system can find information about the original sector from the replacement entry and find replacement information about this original sector by looking up the replacement entry for this original sector. That is, as shown in FIG. 6 or 7, it is possible to know whether the replacement of the original sector has been made in blocks or sectors, and also how many sectors have been replaced in succession. In addition, the address information of the replaced sector may be known.

The drive system then locates the replacement sector from the disc, reads a block containing the replacement sector (1230), and plays it.

The recording or reproducing method as described above can also be embodied as computer readable codes on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet). Include. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. In addition, functional programs, codes, and code segments for implementing the recording or reproducing method can be easily inferred by programmers in the art to which the present invention belongs.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

According to the present invention as described above, even if it is intended to replace some sectors rather than the entire block due to the replacement entry indicating the replacement status in the sector unit, the time required for the replacement operation compared to the prior art is not required. Can be reduced. In addition, in the case of substituting sector by sector and indicating a substituting entry of a sector unit as in the present invention, if the size according to the number of sectors to be replaced is smaller than or equal to one block size, the number of blocks required for replacement is One block is sufficient to prevent loss of user data area capacity.

Claims (46)

In the information storage medium, For replacement by logical overwriting for updating of data recorded on the medium or replacement by a defect generated in the medium, a recording block written for the replacement has replacement data replacing original data in units of the block. Information storage medium, characterized in that arranged in small units. The method of claim 1, And the padding data is further arranged in the recording block when the size of the replacement data is not a multiple of the size of the recording block. The method of claim 1, And a unit smaller than the block unit indicates a sector unit. The method of claim 3, The replacement entry for containing information about the replacement, the information comprising the position information of one or more consecutively replaced sectors, the location information of one or more consecutively replaced sectors, the number information of the consecutively replaced sectors Storage media. The method of claim 4, wherein The position information of the sectors to be replaced indicates the physical address of the first sector or the physical address of the last sector among the sectors to be replaced successively, and the position information of the sectors to be replaced indicates the physical address of the first sector among the sectors to be replaced successively. An information storage medium, characterized by an address or physical address of the last sector. The method of claim 4, wherein And information on the number of consecutively replaced sectors is represented by " number of consecutively replaced sectors -1 ". The method of claim 3, The replacement entry for containing information on the replacement, the information comprising the information indicating the replacement unit, the position information of one or more consecutive replacement units, the position information of the one or more consecutive replacement units, characterized in that Storage media. The method of claim 7, wherein The information indicating the replacement unit indicates whether the replacement unit is a block unit or a sector unit. The method of claim 7, wherein The location information of the replacement units to be replaced indicates the physical address of the first sector or the physical address of the last sector of the replacement units to be successively replaced, and the location information of the replacement units to be replaced is the first of the replacement units to be replaced successively. And an physical address of the first sector or the physical address of the last sector. The method of claim 7, wherein And the replacement entry further includes information about the number of consecutive replacement units. The method of claim 10, And information on the number of consecutively replaced sectors is represented by " number of consecutively replaced sectors -1 ". In the recording apparatus, A recording unit for recording data on the information storage medium; Substituting replacement data for replacing original data in a recording block written for the replacement for replacement by a logical overwrite for updating of data recorded on the medium or by a defect generated in the medium, than the block unit And a control unit arranged in small units and controlling the recording unit to record the recording block on the medium. The method of claim 12, The control unit, And if padding data is not a multiple of the size of the recording block, padding data is further arranged in the recording block. The method of claim 12, And a unit smaller than the block unit indicates a sector unit. The method of claim 14, The control unit, To manage the information about the replacement, generating a replacement entry including location information of one or more consecutively replaced sectors, location information of one or more consecutively replaced sectors, and information on the number of consecutively replaced sectors; Recording device. The method of claim 15, The position information of the sectors to be replaced indicates the physical address of the first sector or the physical address of the last sector among the sectors to be replaced successively, and the position information of the sectors to be replaced indicates the physical address of the first sector among the sectors to be replaced successively. And a physical address of the last sector or address. The method of claim 15, And information on the number of consecutively replaced sectors is represented by " number of consecutively replaced sectors -1 ". The method of claim 14, The control unit, In order to manage the information about the replacement, generating a replacement entry including information indicating the replacement unit, the location information of one or more consecutive replacement units, the location information of one or more consecutive replacement units Recording device. The method of claim 18, And the information indicating the replacement unit indicates whether the replacement unit is a block unit or a sector unit. The method of claim 18, The location information of the replacement units to be replaced indicates the physical address of the first sector or the physical address of the last sector of the replacement units to be successively replaced, and the location information of the replacement units to be replaced is the first of the replacement units to be replaced successively. And a physical address of the first sector or the physical address of the last sector. The method of claim 18, And the substitute entry further includes information on the number of consecutive replaced units. The method of claim 21, And information on the number of consecutively replaced sectors is represented by " number of continuously replaced replacement units -1 ". In the playback device, A reading unit for reading data from the information storage medium; The recording block in which the replacement data for replacing the original data is arranged in units smaller than the block unit for replacement by logical overwriting for updating of data recorded on the medium or replacement by a defect generated in the medium. And a control unit which controls the reading unit to read from the reading unit. The method of claim 23, wherein A unit smaller than the block unit represents a sector unit. The method of claim 24, The control unit, To obtain information on the substitution, from the medium, a replacement entry comprising position information of one or more consecutively replaced sectors, position information of one or more successively replaced sectors, and information on the number of consecutively replaced sectors; And a reproducing device. The method of claim 24, The control unit, To obtain from the medium a replacement entry comprising information indicating a replacement unit, location information of one or more successive replacement units, and location information of one or more successive replaced units, to obtain information regarding the replacement; A reproducing apparatus, wherein the reproducing unit is controlled. In the recording method, For replacement by logical overwriting for updating of data recorded on an information storage medium or replacement by a defect generated in the medium, replacement data for replacing original data in a recording block written for the replacement is performed on a block basis. Arranging in smaller units, And recording the recording block onto the medium. The method of claim 27, The arrangement step, Arranging padding data in the recording block if the size of the replacement data is not a multiple of the size of the recording block. The method of claim 27, And a unit smaller than the block unit indicates a sector unit. The method of claim 29, In order to manage the information regarding the replacement, generating a replacement entry including location information of one or more consecutively replaced sectors, location information of one or more consecutively replaced sectors, and information on the number of consecutively replaced sectors; The recording method further comprises. The method of claim 30, The position information of the sectors to be replaced indicates the physical address of the first sector or the physical address of the last sector among the sectors to be replaced successively, and the position information of the sectors to be replaced indicates the physical address of the first sector among the sectors to be replaced successively. And a physical address of the last sector or address. The method of claim 30, And information on the number of consecutively replaced sectors is represented by " number of consecutively replaced sectors -1 ". The method of claim 29, Generating a replacement entry comprising information indicating replacement units, location information of one or more consecutive replacement units, and location information of one or more consecutive replacement units, to manage the information regarding the replacement; Recording method comprising a. The method of claim 33, wherein And the information indicating the replacement unit indicates whether the replacement unit is a block unit or a sector unit. The method of claim 33, wherein The location information of the replacement units to be replaced indicates the physical address of the first sector or the physical address of the last sector of the replacement units to be successively replaced, and the location information of the replacement units to be replaced is the first of the replacement units to be replaced successively. And a physical address of the first sector or the physical address of the last sector. The method of claim 33, wherein And the replacement entry further includes information on the number of replacement units replaced in succession. The method of claim 36, And information on the number of consecutively replaced sectors is represented by " number of consecutively replaced replacement units -1 ". In the reproduction method, Recalling a recording block in which replacement data replacing original data is arranged in units smaller than a block for replacement by logical overwriting for updating of data recorded on an information storage medium or replacement by a defect generated in the medium. And reading from the medium. The method of claim 38, A unit smaller than the block unit represents a sector unit. The method of claim 38, To obtain information about the replacement, a replacement entry is read from the medium including position information of one or more consecutively replaced sectors, location information of one or more consecutively replaced sectors, and information on the number of consecutively replaced sectors. The playback method further comprises a step. The method of claim 38, To obtain information regarding the replacement, a replacement entry is read from the medium including information indicating replacement units, location information of one or more consecutive replacement units, and location information of one or more consecutive replacement units. The playback method further comprising the step. In the information storage medium, A replacement entry having replacement unit information indicating whether the replacement unit is a recording block unit or a sector unit to manage replacement by logical overwriting for updating of data recorded on the medium or replacement by a defect generated in the medium And an information storage medium recorded in a predetermined area of the medium. In the recording apparatus, A recording unit for recording data on the information storage medium; A replacement entry having replacement unit information indicating whether the replacement unit is a recording block unit or a sector unit, for managing replacement by logical overwrite for updating of data recorded on the medium or replacement by a defect generated in the medium And a control unit for controlling the recording unit to record the replacement entry on the medium. In the playback device, A reading unit for reading data from the information storage medium; A replacement entry having replacement unit information indicating whether the replacement unit is a recording block unit or a sector unit, for managing replacement by logical overwrite for updating of data recorded on the medium or replacement by a defect generated in the medium And a control unit for controlling the reading unit to read from the medium. In the recording method, Substitute having substitute unit information indicating whether the substitute unit is a recording block unit or a sector unit to manage replacement by logical overwriting for updating of data recorded on an information storage medium or replacement by a defect generated in the medium. Creating an entry, Recording the generated replacement entry on the medium. In the reproduction method, Substitute having substitute unit information indicating whether a substitute unit is a recording block unit or a sector unit, in order to manage a substitute by a logical overwrite for updating data recorded on an information storage medium or a substitute by a defect generated in the medium. Reading an entry from the medium; And reproducing the substitute data by referring to the information on the substitute data contained in the read substitute entry.

Images