BRPI0406475B1 - Information storage media for defect management, method for determining whether the fault management of an information storage medium was abnormally interrupted due to an abnormal event, method for determining if the fault management of an information storage media was abnormally interrupted, and defect management unit - Google Patents

Description

DEFECT MANAGEMENT MEDIA FOR DEFECT MANAGEMENT, METHOD FOR DETERMINING IF DEFECT MANAGEMENT OF AN INFORMATION STORAGE WAS INTERRUPTLY DUE TO A DEFECT DETERMINATION, DEFECT DETERMINATION ABNORMALLY INTERRUPTED AND DEFECT MANAGEMENT UNIT Technical Field [0001] The present invention relates to a defect management method for use with respect to a recording media unit and a recording medium for the same and relates to More particularly to a defect management method where a primary defect management area and a secondary temporary defect management area are recorded on the recording medium. Prior Art [0002] Defect management is a process of rewriting data stored in a user data area of a disk where a defect exists, to a new part of the user data area, thereby resolving a loss of data. data caused by the defect.

[0003] Defect management is generally performed using either linear replacement or slipping replacement methods. In linear substitution, the user data area where a defect exists [0004] is replaced by a supplementary data area without defects. In slip skip replacement, the user data area in which the defect is present is omitted and the next user data area in which no defects exist.

Both linear override and skip-over override, however, only apply to discs such as a DVD-RAM / RW, where data can be recorded repeatedly and where recording can be performed using a random access method.

[0006] In the case of single write instance type storage media and many "Write Once Read Many" (WORM) (hereinafter referred to as "single instance write type (" write-once recording media ")", data cannot be overwritten at the same positions as the recording capabilities of these media are limited. Effective defect management is therefore required, and much effort has been made to to develop a defect management method for write-once type write media using a write-read drive for recording media.

[0007] Defect management for write-once type write media is performed using a post-write verification method. More specifically, a write-read drive for write media writes data to specified drives on a write-once type write media, and then checks the written data to detect a write position. a portion of the media where a defect exists. Subsequently, the read / write unit rewrites the data previously stored in the defect part to an additional area. The writing / reading unit then creates a Temporary DeFect List (TDFL) which describes the positions of the defect area and the supplementary area that replaces the defect area, and creates temporary defect management (TDDS) information that specifies the recording position of the TDFL. The combination of TDFL and TDDS is referred to as a Temporary Defect Management Structure (TDMS).

The write / read drive then stores the TDFL or TDDS created in a memory and records the information stored in a Temporary Defect Management Area (TDMA) of the recording media. write-once instance type when the amount of information stored in memory reaches a predetermined level. The TDMS is updated whenever data is written to the write media of the write-once instance type.

[0009] Write-once type write media is terminated when no more data can be written to it or when a user does not want to write more data to it. During finalization of write-once type write media, a TDMS most recently written to TDMA is copied to a Defect Management Area (DMA).

[00010] Defect management by the write / read unit for write media on write-once type write media is however abnormally interrupted when a power supply provided for The write / read drive for recording media is interrupted due to an abnormal event, such as a power failure. For example, the write / read drive for recording media may experience a power failure before writing a TDFL or TDDS, which is created while writing data to single instance type write media. -once "), in a TDMA. In this case, the TDDS will not be updated successfully. Additionally, when the write-once type write media is reloaded to the write drive for recording media after power is restored, the write drive will not be able to check whether or not fault management has been interrupted abnormally.

Disclosure of the Invention The present invention provides a defect management method for write-once type write media during which an abnormal defect management interruption caused by an abnormal event , as, by way of non-limiting example, by a power outage is subject to verification.

[00012] The present invention also provides a write / read drive for recording media that allows for easy verification of an abnormal termination of a fault management operation caused by an unavoidable accident.

[00013] The present invention also provides an information storage medium in which an abnormal interruption of a defect management operation caused by an unavoidable accident can be easily ascertained.

According to one aspect of the present invention, there is provided a defect management method for an information store media, including: recording first state information that specifies that an update cycle of a temporary data management structure (TDMS) is pending (open, not completed) when the TDMS update begins, where TDMS contains information regarding temporary defect management; TDMS update when data is alternatively written to, or read from, information storage media; and recording second status information specifying that the TDMS update cycle has been completed (closed) when the TDMS update is completed.

The first status information may be recorded in response, alternatively, to a TDMS update cycle open command, or to a data write or read data command to / from the storage medium. information.

The update may include recording of the first state information based on the updated TDMS.

[00017] Second status information may be recorded in response to an eject command from the information store media.

According to another aspect of the present invention, there is provided a defect management method for an information store media, wherein the method includes: recording first state information, which specifies that an update cycle of a data is pending (open) for an area of the information storage media when data refresh begins when writing data to or reading data from the information storage media; updating predetermined data, which is generated when data is alternatively written to or read from the information storage media by writing the data to the information storage media; and recording second status information, which specifies that the data update cycle has been completed (closed) in the area after the information update has been completed.

According to a further further aspect of the present invention there is provided a read / write unit including: a pickup device that records data or reads data from an information storage medium loaded on the recorder unit. /reading; and a controller device that controls the pickup device for recording first state information, which specifies that a temporary defect management structure (TDMS) refresh cycle is pending or open in a media area information storage, when a TDMS update containing temporary defect management information begins; controls the pickup device to update the TDMS when data is written to the information store media or when data is read from the information store media; and controls the pickup device to record second status information, which specifies that the TDMS update cycle has ended in that area when the TDMS update is completed.

[00020] The controller device may control the pickup device to record the first status information in said area in response to a TDMS update cycle open / start command or in response to a write command /reading.

The controller device may control the pickup device to record the first status information in said area based on an updated TDMS when the TDMS is updated while writing data to the information storage media or during reading data from the information store media.

The controller device may control the pickup device to record the second status information in said area in response, alternatively, to an information store media eject command, or a shutdown command. TDMS update cycle.

According to a still further aspect of the present invention there is provided a read / write unit including: a pickup device that writes data to or reads data from an information storage medium loaded on the write / read unit; and a controller device that: controls the pickup device to record first state information, which specifies that an information update cycle is pending or open in an area of the information storage media when it is information update has started while writing data to the information storage media or reading data from the information storage media; controls the pickup device to update predetermined data, which is generated when data is alternatively written to the information storage media, or is read from the information storage media by writing the information to the storage media of information; and controls the pickup device to record second status information, which specifies that the information update cycle has ended in that area when the information update has been completed.

According to a further aspect of the present invention, an information storage medium is provided which includes a lead-in area, a user data area, and a storage area. lead-out area, in which a temporary defect management (TDMS) structure is recorded containing temporary defect management information and TDMS update cycle state information, where the information update cycle status specifies whether the TDMS update cycle is open or closed.

[00025] TDMS may contain temporary defect management information (TDDS) and a temporary defect list (TDFL) and TDMS update cycle status information is contained in TDDS.

[00026] At least one TDMA may be formed from at least one of the lead-in area / user data area, and the lead-out area area "), and the TDMS and TDMS refresh cycle status information can be written to the TDMA.

According to a still further aspect of the present invention there is provided an information storage medium including information relating to and generated during data recording or reading recorded data; and update cycle status information that specifies whether an update cycle of the information is open or completed, and which is recorded according to said information.

According to another further aspect of the present invention, there is provided a method for determining if a data recording has been interrupted under abnormal circumstances on an information storage media due to an abnormal event. The method includes: reading second status information that specifies that a TDMS update cycle has been completed and is closed after the TDMS update has completed. First state information that specifies that an update cycle for a temporary defect management (TDMS) structure is open is recorded when the TDMS update begins, where the TDMS contains temporary defect management information. The TDMS is updated when data is alternatively written to the information store media, or data is read from the information store media.

Additional and / or supplementary aspects and advantages of the invention will be set forth in part in the description which follows, and will be in part obvious from that description, or may be learned by practicing the invention.

BRIEF DESCRIPTION OF THE DRAWINGS These and / or other aspects and advantages of the invention will become more apparent and will be more readily appreciated from the following description of the embodiments thereof, considered in combination with the accompanying drawings, in which: FIG. 1 illustrates a single-layer data structure of write-once type write-write media according to one embodiment of the present invention; FIG. 2 illustrates an example of a data structure of information recorded in a temporary defect management (TDMA) area; FIG. 3 illustrates an example of a temporary defect management information (TDDS) data structure; FIG. 4 is a block diagram of a data storage media write / read unit performing defect management on a write-once type write media / according to a configuration of the present invention; FIG. 5 is a detailed block diagram of the data storage media write / read unit illustrated in FIG. 4; FIG. 6 illustrates states of a write-once type recording medium in which a defect management process is performed in accordance with one embodiment of the present invention; and FIG. 7 is a flow chart illustrating a defect management method for an information storage medium in accordance with a configuration of the present invention.

Preferred Mode of Practice of the Invention Detailed reference will now be made to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, in which identical reference numerals in turn refer to identical elements from beginning to end. The configurations are described below for purposes of explanation of the present invention and by reference to the figures.

In the present disclosure, defect management in accordance with various embodiments of the present invention is described with respect to a write-once type write media, which is an example of a write-once media. information storage. However, it should be understood that other media may be used in this same context.

[00033] FIG. 1 illustrates a data structure of a single-layer write type representation of a write-once type write media according to one embodiment of the present invention. Referring to FIG. 1, write-once type write media includes a lead-in area, a data area, and a disk output area (" lead-out area "). The lead-in area includes a Defect management Area (DMA) # 1, a DMA # 2, a recording condition test area, a Primary Temporary Defect Management Area (TDMA), and a media write / read unit information area.

[00034] In the data area an additional area # 1, an additional area # 2, a secondary TDMA, and a user data area are formed. In the lead-out area a DMA # 3 and a DMA # 4 are formed.

In general, a rewritable recording medium includes DMA's but does not include a temporary DMA (TDMA), while TDMA's are additionally assigned to a write-once type recording media. "), in addition to DMA's, taking into account the characteristics of this media type.

More specifically, in the case of write-once type write media, writing data to a position in which data has already been written is not allowed. Thus, when it is necessary to update information regarding a newly generated defect while writing data, a write / read drive for recording media reads the most recently recorded defect information and updates the current defect information by writing, additionally, the most recently generated defect information in a new cluster. For this reason, as data is more frequently written to write-once type media, the amount of defect information grows cumulatively.

However, due to the fact that a DMA formed on a conventional rewritable recording medium has a reduced recording capacity, the DMA is usable as an area in which defect management is performed. Therefore, a TDMA whose write capacity is greater than DMA write capacity is additionally assigned to the write-once type write media.

In DMA, a temporary defect management structure (TDMS) most recently written to TDMA is written during the finalization of write-once type write media. This makes it possible to write data to a write-once type write-media using a write-read drive for write media, reducing the time required to initialize the media. write-once type of write-once instance.

[00039] Recording media initialization is a process of reading data from a lead-in area or a lead-out area by which determines how the recording media will be managed and how data will be written to the recording media or how data will be read from it. Thus, as the amount of information recorded in the lead-in area or lead-out area of a recording medium increases, a corresponding Increasing the amount of time required to initialize the recording media after the recording media is loaded into a write / read drive for recording media. A search speed for data recorded on a DMA is even higher than the search speed for data recorded on a TDMA with a large recording capacity.

Referring to FIG. 1, write-once type write media includes two TDMA's, that is, a primary TDMA and secondary TDMA's, where the TDMS is recorded. As mentioned above, the TDMS contains a Temporary DeFect List (TDFL) and Temporary Defect Management (TDDS) information. TDFL specifies the positions of an area containing a defect and an additional area that replaces the area where the defect is located, and TDDS specifies the recording position of the TDFL.

The TDMS contains a Space Bit Map (SBM) which uses bit values to indicate whether data is recorded in data clusters constituting an integral recording area of the media. write of the write-once instance type in addition to TDDS and TDFL. SBM is writable alternatively in an additional cluster or in a cluster containing TDMS.

[000 42] The inclusion of secondary TDMA in the data area is optional and depends on a decision of a user or manufacturer of write / read drives. The reason for the inclusion of secondary TDMA depends on a decision of a user or manufacturer of write / read drives to make it possible for the user or the disk manufacturer to make proper use of single write-once instance.

[00043] Supplemental areas # 1 and # 2 are assigned to the data area during initialization of write-once type write media when defect management is performed using the write unit / read for write media.

[00044] FIG. 2 illustrates an example of a data structure of information recorded in a TDMA. Referring to FIG. 2, TDDS's and TDFL's are recorded in TDMA in cluster data units. In TDMA, an area in which TDDS is recorded and an area in which TDFL 's are recorded are not further divided, ie they are recorded in the same space as TDMA. Therefore, the respective TDDS's and TDFL's are recorded in at least one cluster in the sequence in which they are generated (N and k are integers greater than 1).

[00045] FIG. 3 illustrates an example of a data structure of a TDDS illustrated in FIG. 2. Referring to FIG. 3, a TDDS #i (i is an integer greater than 0) specifies the position of a recordable recording condition test area, the position of a TDFL #i corresponding to TDDS #i, write protect information, a update count indicating the number of TDDS #i updates, supplemental area sizes # 1 and # 2 assigned to a data area, a C_flag marker, and so on.

As used in this descriptive report, the term C_flag designates a "consistency flag" that represents the state of a TDMS update cycle. The C_flag element is described in more detail below.

Although not illustrated in the drawings, according to this embodiment of the present invention, the areas formed on the single write layer of the write-once type media of FIG. 1 are also included in a dual layer of write-once type write-write media. In the double-write layer of the write-once type write media, an inner area # 0, a data area # 0, and an outer area # 0 are sequentially formed into a first layer. axially from the inside to the outside of the media, and an outer area # 1, a data area # 1, and an inner area # 1 are sequentially formed on a second axially inside to outside of the media.

Thus, defect management according to the present embodiment of the invention can be performed on a write-once type write media with a double write layer. A primary TDMA of the second recording layer can be used when a primary TDMA of the first recording layer is already filled with data, and a secondary TDMA of the second recording layer can be used when a secondary TDMA of the first recording layer is already filled. find filled with data.

[00049] FIG. 4 is a block diagram depicting a read / write unit performing fault management on a write-once type write media in accordance with one embodiment of the present invention. Referring to FIG. 4, the apparatus includes a write / read unit 1, a controller device 2, and a memory 3.

[00050] Write drive 1 writes data to write-once type write media 4 which consists of information store media, and reads data from disk type single instance record 4 for checking recorded data.

[00051] Controller device 2 performs defect management on data written to the write-once type 4 write media by using a TDMA formed on the write-once type instance write media. write-once 4.

[00052] In this configuration, controller device 2 uses a check-after-write method whereby data is written to the write-once type write media 4 in specified units and the recorded data is checked for an area of the write-once type 4 write media where a malfunction occurs. More specifically, controller device 2 writes user data to the write-once type 4 write media to specified drives, checks the recorded user data for detection of a single instance disk area 4 where a defect occurs, and creates a TDFL and a TDDS that describe the position of the area where the defect exists. Controller device 2 then stores the TDFL and TDDS created in memory 3. If the amount of information stored reaches a predetermined level, controller device 2 records the information stored in the TDMA of single instance type recording media. write-once 4.

[00053] FIG. 5 is a detailed block diagram of the write / read unit illustrated in FIG. 4, which performs the defect management operation on a write-once type write medium according to a configuration of the present invention. Referring to FIG. 5, the write / read unit for recording media includes a pickup device 10 which corresponds to the write / read unit 1 of FIG. 4. A write-once type write media 4 is loaded on the pickup device 10. In addition, the write / read unit includes a controller device 2 in which a PC I / F 21 computer interface, a Digital Signal Processor (DSP) 22, a radio frequency (AM) amplifier (AMP) 23, a servo device 24, and a system controller 25. A memory 3 is included in system controller 25 of controller device 2.

During a recording operation, the PC I / F 21 interface receives data for recording and a recording command from a host computer (not displayed). System controller 25 initializes the write-once type 4 write media as needed for the write operation. DSP 22 receives data to be recorded from the PC I / F 21 interface; Error Correction Code (ECC) coding is performed on the data by incorporating additional data, such as error correction parity data, into previously existing data; and modulation of the ECC encoded data is performed using a specified method. RF AMP 23 converts the output data from DSP 22 to an RF signal. Pickup device 10 records the RF signal output as output from RF AMP 23 on the write-once type write media 4. Servo device 24 receives a command from system controller servo control 25 and performs servo control relative to the pickup device 10. In addition, to perform defect management during the recording operation, system controller 25 instructs the pickup device (" pickup ") 10 to read data from the write-once instance type write media 4 or write information such as temporary management information to the write-only instance type write media -once ") 4.

Additionally, system controller 25 instructs pickup device 100 to record a TDMS containing a TDDS and TDFL, most recently recorded on a TDMA, to terminate single instance type recording media. write-once 4 when given a command by a user or when predetermined disk termination conditions are met.

[00056] During a read operation, the PC I / F 21 interface receives a read command from the host computer. · System controller 25 performs the disk initialization required for the read operation. Pickup device 10 illuminates with a laser beam single write-once type recording media 4 and outputs and outputs an optical signal from the reflected laser beam write-once type recording media 4. The RF amplifier 23 converts the optical signal produced by the pickup device 10 to an RF signal, provides modulated data RF signal to DSP 22, and provides a servo control signal, for servo control, obtained from the RF signal, to servo device 24. DSP 22 demodulates modulated data, performs ECC coding on data demodulated, and outputs ECC-coded data. The servo device 24 performs servo control of the pickup device 10 in response to the servo control signal output as output from the RF amplifier 23 and the servo control command output as output from the system controller 25. The PC I / F 21 interface sends data received from DSP 22 to the host computer. In addition, system controller 25 may instruct pickup 10 to read defect management information from write-once type 4 during the read operation. System controller 25 manages the entire system during the write / read operation.

[00057] A defect management method for write-once type write media will now be described.

The present invention introduces a consistency marker element (hereinafter referred to as 'C_flag') consisting of information that specifies a TDMS refresh cycle and states of a TDMS refresh cycle to determine whether a management operation The defect has been interrupted abnormally due to the occurrence of an abnormal event while writing data to an information store media.

[00059] FIG. 6 illustrates states of a write-once type write medium on which defect management is performed according to a configuration of the present invention. Referring to FIG. 6, a TDMS describes two states of the write-once type of write media: a TDMS refresh cycle open state where C_flag = '1', and a closed loop-state of TDMS update where C_flag = '0'. The value of C_flag is determined and recorded according to the state of the updated TDMS. When a write-once type write media is loaded into a write drive for write media, and the value of C_flag, which is the state information for an updated TDMS , consisting of '1', the write / read unit will assume that an abnormal event such as a power failure occurred while using the recording media, and thus fault management was not completed normally.

Referring to FIGS. 4 and 6, a defect management method for write-once type write media according to another embodiment of the present invention will now be described in detail. First, when a write-once type write media 4 is loaded on a write-read drive for write media (operation 10), the TDMS refresh cycle reaches a state 100. State 100 indicates that no data has ever been written to the write-once type write media 4, or indicates that the write-once type write media once ") 4 enters the closed state of the TDMS refresh cycle with the value of C_flag = 0 most recently written to the TDMS when data was written and a defect management operation was successfully performed on it.

[00061] If data has never been written to the write-once type 4 write media, controller device 2 writes to a first cluster of data from a primary TDMA , the C_flag = 0 element, and information indicating that defect management is performed by using the write / read unit for write media, while initializing write-once type write media 4 The C_flag element is recorded in the TDDS as mentioned above with reference to FIGS. 2 and 3.

According to this configuration, a TDDS with a C_flag = 1 element is written and write-once type write media 4 enters a state 110 such that the TDMS refresh cycle is open in response to a command from a host computer ("host") or according to a write / read operation (operation 20) and the write instance-type write media (" write-once ") 4 enters the open state of TDMS refresh cycle.

[00063] Two cases in which the TDMS refresh cycle is in the open state are as follows: [00064] Opening the TDMS refresh cycle by a host computer command [00065] When the recording media of the write-once instance type 4 containing a final TDMS, more specifically a most recently written TDDS, with C_flag = 0, is loaded into the write media read drive, the controller device 2 receives a TDMS update cycle open command from a host ("host") computer (not displayed). Controller device 2 then controls write / read unit 1 to write a TDDS with C_flag = 1 at a subsequent TDMS position to the most recently written TDMS to indicate the open state of the TDMS refresh cycle. In this case, the value of C_flag changes but other information such as a TDFL remains unchanged. Thus, only one TDDS containing an altered C_flag element is written to a new cluster.

Opening TDMS Update Cycle According to a Write / Read Operation [00067] When write-once type media 4 having a most recently written instance of TDDS with C_flag = '0' is loaded into the write / read drive for writing media, so it is ready to write or read data, the host computer sends a write / read command to the write drive / read for write media, and the write / read drive for write media performs the write / read operation on the write-once type write media 4. If you need to update the TDMS During write / read operation, controller 2 controls write / read unit 1 to record a TDDS with C_flag = 1 at a subsequent TDMS position relative to the most recently TDMS written to the TDMA to indicate the open state of the TDMS refresh cycle.

[00068] The TDMS is updated after the check-after-write method is performed once or several times, or after a predetermined amount of data has been recorded. On this occasion, the TDMS is updated to include C_flag = 1 and is written to TDDS.

Similarly, update defect management of a TDMS is also performed when it is determined that a data cluster ("cluster") contains a defect during a single instance type write media data read operation. write-once 4.

After state 110 in which C_flag is written to value 1 and the TDMS update cycle is opened, a write / read operation (operation 30) is performed, and a new TDMS is created and stored in memory 3. For effective use of TDMA, controller device 2 preferably performs TDMS update by writing TDMS to TDMA only when the main computer provides a TDMS update command (operation 50). On this occasion the TDMS is updated such that the element C_flag = 1 is included in the TDDS.

State 120 indicates a disk state, that is, an open TDMS refresh cycle state with C_flaq = 1, where the TDMS can be updated during the write / read operation (operation 30). At state 120, when the host computer produces a TDMS update command (operation 50), controller device 2 updates the TDMS including C_flag = 1 in TDDS and the TDMS update cycle returns to state 100 .

After opening the TDMS update cycle in response to a TDMS update cycle open command from a host computer or according to a write / read operation, a command is given. write-once type 4 write-media eject drive from the write-read drive to write media or a TDMS refresh cycle close command (operation 40). Controller device 2 then controls write / read unit 1 to write a TDDS with C_flag = 0 to the TDMA. In this case, C_flag = 0 indicates that the TDMS refresh cycle is closed. When TDDS with C_flag = 0 is written to TDMA, write-once type write media 4 enters closed state 130 of the TDMS refresh cycle.

[00073] If the host computer provides a TDMS refresh cycle close command instead of a write-once type write media eject command 4, the TDMS refresh cycle enters state 130 and returns to state 100. In state 130, when the host computer provides a command to eject the write-instance type write media once ") 4, the write-once type write media 4 is ejected from the write / read drive to write media (operation 70).

[00074] At state 130, if a user enters a write-once terminate command of write-once type 4, controller device 2 controls the read / write unit to write data such as as "ffh" in a vacant area in TDMA, thereby preventing data writing such as a TDMS containing a TDDS, TDFL, or an SBM in TDMA.

As mentioned above, according to this embodiment of the present invention, a C_flag element indicating two states of the TDMS refresh cycle, that is, the TDMS refresh cycle open state and the closed state, is recorded in the TDMS. of TDMS update cycle. Therefore it is possible to check whether an abnormal event such as a power failure to the write / read drive for write media occurred while using write-once type write media ) 4. If a power outage has occurred for the read / write drive for write media while using write-once type write media 4, the value of C_flag indicating that the TDMS update cycle was open should finally be written to TDMA.

[00076] TDMS is recorded repeatedly to increase the level of data detection reliability. For example, during the TDMS update, the TDMS is repeatedly recorded in continuous TDMA clusters, or a new TDMS is written to a primary TDMA and a copy of the new TDMS is written to a secondary TDMA.

Up to this point a defect management process according to the present invention has been described with respect to write-once type write media. However, the type of an information storage medium on which defect management in accordance with the present invention may be performed is not limited to this type of media. That is, defect management for an information store media according to the present invention utilizing a refresh cycle and cycle state information is not limited to updating a TDMS of a recording media of type write-once instance.

As mentioned above, there is a case where an abnormal event such as a power failure occurs while the write / read drive for writing media writes information, which is generated with respect to data writing or with read data, on an information storage media loaded in the drive, periodically or at some time during a write / read operation. In this case, the power to the write / read drive for recording media is interrupted and the information writing is abnormally interrupted. According to one embodiment of the present invention, when the information storage media is reloaded into the write / read drive for recording media, the write / read drive for recording media determines that an abnormal write interrupt occurs. information by reference to a final instance of update cycle state information.

[00079] FIG. 7 is a flow chart illustrating a defect management method for information storage media in accordance with one embodiment of the present invention. The defect management illustrated in FIG. 7 is achievable using, for example, the write / read unit illustrated in FIG. 4 or FIG. 5. From this point on it will be described with reference to FIGS. 4 and 7 a defect management method for information storage media in accordance with a configuration of the present invention.

First, an information store media is loaded in action 310. In action 320 a specific information update loop for data writing or data reading is opened. In this configuration, information storage media may consist, by way of non-limiting examples, of optical recording media such as a Digital Versatile Disc (-DVD), or a Hard Disk - HD).

In addition, data writing or data reading information is information generated on an information storage media during a data writing or reading operation, and must subsequently be written to the information storage media for reading the data. For example, the data may consist of defect information for a data area of the information store media. As previously mentioned, defect information is written to a TDMS formed on a write-once type write media or a DMA formed to a rewritable write media.

[00082] In this configuration, the information refresh cycle is described as open in response to a refresh cycle open command or a write / read command from a host computer (not shown). However, it should be understood that the opening conditions of the update cycle may be set differently.

[00083] In action 330, when the information refresh cycle is opened, controller device 2 controls write / read unit 1 to write update cycle open state information to a predetermined area of the information store media. loaded on the disk drive. Update cycle state information specifies the state of the update cycle using a consistency flag. If the consistency marker value is 1, the update cycle is open. If the consistency marker value is 0, the update cycle is closed.

[00084] In action 340, controller device 2 controls write / read unit 1 to write data to the information storage media or to read data from the information storage media.

[00085] In action 350, controller device 2 creates the specified information that needs to be updated whenever data is written to the information store media or data is read from the information store media.

[00086] In action 360, the controlling device 2 determines whether or not the information update cycle has been completed. If it is determined in action 360 that the refresh cycle has not been completed, the defect management routine returns to action 330, the information created in action 350 is written to the information store media, and is again written to the storage media. information the update state open state information.

However, if it is determined that the refresh cycle has been completed, the information created in action 350 is written to the information store media and the refresh cycle closed state information is again recorded in action 370.

During recording of update cycle state information in action 330 or action 370, it is preferred that update cycle state information is incorporated into the information and that information is written to the information store media. If refresh cycle open-state information is written first after the information store media is loaded into the disk drive, the recorded information is compared with previously recorded information, and information is recorded in which only refresh cycle state, refresh cycle closed state information becomes refresh cycle open state information.

As described above, a defect management operation in accordance with the disclosed embodiments of the present invention enables a write / read drive for recording media to easily detect the occurrence of an abnormal interruption of a data write operation. on an information storage media, such as when caused by an event such as a power failure to the write / read drive to write media due to a power failure in the supply network, when the storage media information is loaded back into the write / read drive for recording media.

Although only a few embodiments of the present invention have been illustrated and described, the present invention is not limited to the disclosed embodiments. Instead, it will be appreciated by those skilled in the art that changes may be made to the configurations of the present invention without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalences. - CLAIMS -

Claims (16)

1. DEFECT MANAGEMENT INFORMATION STORAGE MEDIA, comprising: defect management information relating to, and generated during, a data write operation or reading of recorded data with respect to the information storage media; characterized by further comprising: update cycle state information that specifies whether an information update cycle is open or closed, and which is recorded based on when the information update is completed. Information storage media according to claim 1, characterized in that the update cycle state information is contained in the information and is recorded during the update of the information. Information storage media according to claim 1, characterized in that the update cycle state information specifies that the information update cycle is closed when the information update is completed successfully. Information storage media according to Claim 1, characterized in that the information storage media consists of a write-once type storage media or a storage media. rewritable information. 5. METHOD FOR DETERMINING IF THE DEFECT MANAGEMENT OF AN INFORMATION STORAGE MEDIA HAS BEEN INTERRUPTLY DUE TO AN ABNORMAL EVENT, the method comprising: reading state information that specifies whether a management structure update cycle temporary storage defect (TDMS) of the information storage media is open or closed, the TDMS containing information with respect to temporary defect management; and determining that TDMS is up to date where the TDMS update cycle is closed and that TDMS is not up to date when the TDMS update cycle is open. Method according to claim 5, characterized in that the information storage medium consists of a write-once type information storage medium or a rewritable information storage medium. Method according to claim 5, characterized in that reading the state information comprises reading last recorded state information from the TDMS. Method according to claim 5, characterized in that the TDMS is updated for defect management when given is one of those recorded in and read from the information storage media. 9. METHOD FOR DETERMINING IF THE DEFECT MANAGEMENT OF AN INFORMATION STORAGE MEDIA HAS BEEN INTERRUPTEDLY, the information storage medium comprising a temporary defect management area, the method comprising: reading a "flag" on the temporary defect management area that specifies whether an update cycle of a temporary defect management structure of a temporary defect management area is open or closed, the temporary defect management structure containing information regarding temporary defect management ; and determining that the temporary defect management framework is up to date where the update cycle is closed and that the temporary defect management framework is not up to date where the update cycle is open. Method according to claim 9, characterized in that reading the flag comprises reading the last recorded flag of the temporary defect management structure. Method according to claim 9, characterized in that the temporary defect management structure is updated for defect management when given is one of the recorded in or read from the information storage medium. A defect management unit, comprising: a pickup device that writes data to or reads data from a loaded information storage media; and a controller device that controls the pickup device for writing data to or reading data from an information storage medium, characterized in that the controller device additionally controls the pickup device for reading data from state that specifies whether an update cycle of an information store media temporary defect management (TDMS) structure is open or closed, the TDMS containing temporary defect management information, in which the unit determines that the TDMS is updated where the TDMS update cycle is closed and TDMS is not updated where the TDMS update cycle is open. UNIT according to Claim 12, characterized in that the controller controls the pickup device to read state information last recorded in the TDMS. UNIT according to claim 12, characterized in that the TDMS is updated to manage defect when the data is written to or read from the information storage medium. Defect management unit, comprising: a pickup device that writes data to or reads data from an information storage medium; and a controller device that controls the pickup device for writing data to or reading data from an information storage medium; characterized in that the controller device additionally controls the pickup device for reading status information that specifies whether a fault management information update cycle is open or closed from an area of the information storage media, where: the unit determines that the information is updated where the update cycle is closed and that the information is not updated where the update cycle is open; and the information is up to date for defect management when data is written to and read from the information storage media. UNIT according to claim 15, characterized in that the controller controls the pickup device to read last recorded state information from the fault management information.