KR19990040763A - Method and apparatus for accessing recording medium having defective area - Google Patents

Abstract

The present invention relates to a recording medium access method and apparatus for stably accessing a recording medium having a defective area using defect information.

In the present invention, the combined unit recording sections existing between the unit recording section corresponding to the start address and the unit recording section corresponding to the end address are searched for by the defect information. According to this search result, the access operation is performed continuously from the unit recording section corresponding to the start address to the unit recording sections corresponding to the ending address while skipping the defective unit recording sections searched.

Description

Method and apparatus for accessing recording medium having defective area

The present invention relates to a recording medium access method and apparatus for accessing a recording medium having a defective area.

Recording media such as hard disks, magneto-optical disks, and optical disks have defect areas in which errors of a certain level or more occur. The defective area not only allows error information not related to the information desired by the user to be recorded, but also allows the user to obtain error information different from the original information from the recording medium. In other words, the defective area reduces the reliability of the recording medium. In order to prevent such a decrease in reliability of the recording medium, the recording medium should not record information in a defective area (unit recording section, area or sector) having poor recording / reproducing characteristics. To this end, the recording medium records an information table (hereinafter referred to as a "defect management table") for the defective areas in a specific area so that the recording medium driver can confirm whether the area in which the information is to be recorded is the defective area. In addition, the area in which information is recorded can be adjusted. The defect management table is divided into a primary defect management table and a secondary defect management table according to the cause of occurrence of the defect areas. In the primary defect management table, the physical addresses of each of the defect areas generated during the manufacture of the recording medium are recorded. In the secondary defect management table, the defective areas generated by the partial deterioration of the material constituting the recording medium. The physical address for each is recorded. The physical address recorded in the secondary defect management table may indicate the position of the first unit recording section of a block (hereinafter referred to as a "defect block") consisting of a predetermined number of unit recording sections including the unit recording section of at least one defect. do. The secondary defect management table may also record the physical address of the first unit recording section of the block to be used instead of the defect block (hereinafter referred to as "replacement block").

On the other hand, the physical address is recorded on the recording medium by the manufacturer so as to have a series of orders for all the unit recording sections including the primary defective unit recording sections. Similar to this physical address, a logical address is used to designate the unit recording sections of the recording medium. The logical address is usually virtually assigned to the recording medium driver by the host computer, so it is called a "virtual address" and has a logical value different from the physical address. In order to accurately access the unit recording section designated by the user (ie, the host computer), the recording medium driver must calculate a physical address corresponding to the logical address. Furthermore, the recording medium driver must search the primary defect management table and the secondary defect management table and adjust the logical value of the calculated physical address according to the search result.

In fact, a recording unit such as a DVD-RAM (Digital Versatile Disc-Random Access Memory) divided into a lead-in area, a data area and a lead-out area as shown in FIG. 1 is referred to as a defective unit recording section (hereinafter referred to as "sector"). First and second Defect Manager Tables (PDT, SDT) are provided with addresses for the first and second Defect Manager Tables. The first defect management table PDT records the physical addresses of the defective sectors Df ₀ , Df ₁ ,... Df _i in the data area from the sector at address 31000h to the sector adjacent to the lead-out area. Will be. The physical addresses recorded in the first defect management table PDT indicate the physical positions of the sectors in which defects are generated during manufacture. Meanwhile, the physical address SDB ₀ , SDB ₁ ,... SDB _i of the first sectors of each of the ECC blocks including at least one defective sector is recorded in the second defect management table SDT by the user. . The ECC block is usually composed of 16 sectors. In addition, in the second defect management table SDD, logical addresses CDB ₀ , CDB ₁ ,... CDD _i for replacement ECC blocks to be used instead of ECC blocks of a defect are physical addresses SDB _0. , SDB ₁ ,... SDB _i ). As described above, in the DVD-RAM, the positions of the defective sectors are indicated by the first and second defect management tables PDT and SDT so that the DVD-RAM driver skips the defective sectors during recording and reproduction of the DVD-RAM.

The DVD-RAM driver for driving such a DVD-RAM includes a recording signal processor 14 and an optical controller 16 connected in series between the repeater 10 and the pickup 12. The recording signal processor 14 codes user information from the host, which is input via the repeater 10, into a channel bit string requested by the DVD-RAM. The optical controller 16 interrupts the light source included in the pickup 12 in accordance with the logical value of the channel bit string from the recording signal processor 14 so that the user information is recorded in the data area of the DVD-RAM. The DVD-RAM driver further includes a detection signal processor 18 and a reproduction signal processor 20 connected in series between the pickup 12 and the repeater 10. The detection signal processor 18 detects a radio frequency (hereinafter referred to as "RF") signal from an electrical signal from a photodetector (not shown) included in the pickup 12. The reproduction signal processor 20 recovers the user information by detecting the channel bit string from the RF signal from the detection signal processor 18 and decoding and error correcting the detected channel bit string. The user information restored by the reproduction signal processor 20 is supplied to the host via the repeater 10. In addition, the DVD-RAM driver includes an address detector 24 connected between the detection signal processor 18 and the microcomputer 22, and a servo (Servo) 26 connected between the microcomputer 22 and the pickup 12. It is provided. The address detector 24 detects a physical address from the RF signal from the detection signal processor 18 and supplies the detected physical address to the microcomputer 22. The servo 26 changes the position of the pickup 12 in the radial direction of the DVD-RAM by a jump instruction from the microcomputer 22 and finely positions the position of the light beam by the electrical signal from the pickup 12. Will be adjusted. The microcomputer 22 controls the servo 26 and the recording signal processor 14 or the reproduction signal processor 20 in response to a logical address inputted from the host via the relay 10 and a recording or reproduction command. Allow sectors on the desired DVD-RAM to be accessed. Thus, in order for the DVD-RAM driver to access the sectors of the DVD-RAM, the microcomputer 22 is configured to perform a series of operations as shown in FIG.

According to Fig. 3, the microcomputer 22 is in the command standby state until a recording or reproducing command is input from the host computer via the repeater 10 (step 11). When a recording or reproducing command is input from the host computer in step 11, the microcomputer 22 transmits the recording signal processor 14 or the reproduction signal processor 20 to the host computer via the repeater 10 according to the input command. (Step 13). In addition, the microcomputer 22 is referred to as a logical address (hereinafter referred to as "start logical address") (SLID) for the first sector of the sectors to be accessed from the host computer and a logical address (hereinafter referred to as "end logical address") for the last sector. (ELID) and the number of sectors and positions to be recorded or reproduced by the start and end logical addresses SLID and ELID are checked (step 15). The microcomputer 22 updates the target logical address (TLID) to the starting logical address to set the sector on the DVD-RAM to be recorded or reproduced. (Step 17). The microcomputer 22 converts the corresponding physical address using the target logical address TLID and converts the physical address corresponding to the first and second defect management tables PDT and SDT as shown in FIG. By adjusting the logical value of the PID, the position for the sector to be accessed, i.e., the target physical address (TPID), is calculated (step 19). The microcomputer 22 writes by controlling the servo 26 until the physical address (hereinafter referred to as "read physical address") (RPID) and target physical address (TPID) read out from the DVD-RAM have the same value. Or the position of the sector to be reproduced is searched (steps 21 to 25). When the read physical address RPID becomes equal to the target physical address TPID in the twenty-third step, the microcomputer 22 enables the record signal processor 14 or the play signal processor 20 to record the user information. Or regeneration (step 27). Next, the microcomputer 22 increases the value of the target logical address ALID by "1" (step 29), and determines whether the target logical address TLID is smaller than the ending logical address ELID (step 29). Step 31). When the target logical address TLID is smaller than the ending logical address ELID in step 31, the microcomputer 22 may control the nineteenth to the fifth until the target logical address TLID is not smaller than the ending logical address ELID. Step 31 will be performed in a relaxed way. Alternatively, when the target logical address TLID is not smaller than the ending logical address ELID, the microcomputer 22 enters an eleventh step of waiting for an instruction.

As described above, in the conventional recording medium access method, the microcomputer must repeatedly calculate the physical address for every unit recording section and check whether the calculated physical address matches the unit recording section in which the current pickup is located. As a result, the conventional recording medium access method not only restricts the design of the microcomputer, but also destabilizes recording and reproduction of information.

Accordingly, it is an object of the present invention to provide a recording medium access method and apparatus capable of stably accessing a recording medium having a defective area using defect information.

It is another object of the present invention to provide a recording medium recording / reproducing apparatus which can stably perform recording and reproducing operations by using defect information on a recording medium having a defective area.

1 is a diagram schematically showing a recording format of a DVD-RAM.

2 is a diagram schematically showing a conventional DVD-RAM driver.

3 is a flowchart for explaining a conventional method for accessing a recording medium having a defective area.

4 schematically illustrates a DVD-RAM driver according to an embodiment of the present invention.

5 is a flowchart illustrating a recording medium access method according to an embodiment of the present invention.

6 is a flowchart illustrating a recording medium access method according to another embodiment of the present invention.

7A to 7C are diagrams illustrating a state in which recording sections are accessed by the flowcharts of FIGS. 5 and 6.

* Explanation of symbols for main parts of the drawings

10, 30: repeater 12, 32: pickup

14, 34: recording signal processor 16, 36: optical controller

18, 38: detection signal processor 20, 40: reproduction signal processor

22, 50: microcomputer 24, 42: address detector

44, 46, 48: first to third registers 52, 54: first and second comparators

In order to achieve the above object, a recording medium access method according to the present invention comprises the steps of inputting a start address and an end address for unit recording sections to be accessed in a recording medium including defective unit recording sections, and by means of defect information. Searching for the combined unit recording sections existing between the unit recording section corresponding to the start address and the unit recording section corresponding to the end address; and skipping the found defective unit recording sections, the unit corresponding to the starting address. And continuously accessing the unit recording sections from the recording section to the unit recording sections corresponding to the end address.

A recording medium access method according to the present invention comprises a first step of inputting a start address and an end address for unit recording sections to be accessed in a recording medium including defective unit recording sections, and corresponding to a start address based on defect information. Checking whether there is a defective unit recording section in the unit recording sections from the unit recording section corresponding to the end address, and if there is a defective unit recording section, skipping the defective unit recording section. Continuously accessing the unit recording sections from the unit recording section corresponding to the start address to the unit recording section corresponding to the end address; and if there is no defective unit recording section, from the unit recording section corresponding to the start address to the end address. Consecutive unit recording sections up to the corresponding unit recording section And a step of access to.

The recording medium access apparatus according to the present invention comprises access means for accessing a recording medium containing defective unit recording sections, and inputting a first start address and a first end address for the unit recording sections to be accessed in the recording medium. On the basis of the address input means and the defect information, it is detected whether there is a defective unit recording section in the unit recording sections from the unit recording section corresponding to the first start address to the unit recording section corresponding to the first end address. Address generating means for selectively generating at least one or more pairs of the second start address and the second end address, and at least one pair of the first start and first end addresses and the address generation means from the address input means; Continuous access means in response to the second start address and the second end address And a drive control means for driving the.

The recording medium recording / reproducing apparatus according to the present invention comprises reproducing means for reproducing information recorded on a recording medium containing defective unit recording sections, recording means for recording information on the recording medium, and recorded on the recording medium. Address detecting means for detecting an address, address input means for inputting a first start address and a first end address for the unit recording sections to be accessed among the unit recording sections of the recording medium, and a first based on the defect information. It is detected whether there is a defective unit recording section in the unit recording sections from the unit recording section corresponding to the start address to the unit recording section corresponding to the first end address, and according to the detection result, at least one pair or more second start addresses. And address generating means for selectively generating a second end address, and a first starting word from the address input means. A counter for loading any one of the address and at least one second start address from the address generating means and counting the loaded start address, and a first end address from the address input means and at least one or more from the address generating means. A storage means for temporarily storing any one of the second end addresses, and a first comparing means for comparing the address from the address detecting means with the output signal of the counter and driving either one of the reproducing means and the recording means according to the comparison result. And comparing the address from the address detecting means with the ending address stored in the storing means so that a new starting address is loaded into the counter according to the comparison result and the new ending address is stored in the storing means. With second comparison means All.

Other objects and advantages of the present invention in addition to the above objects will become apparent from the detailed description of the following embodiments with reference to the accompanying drawings.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying FIGS. 4 to 7.

4 illustrates a DVD-RAM access device according to an embodiment of the present invention. In FIG. 4, the DVD-RAM access device includes a recording signal processor 34 and an optical controller 36 connected in series between the repeater 30 and the pickup 32. As shown in FIG. The recording signal processor 34 codes user information from a host computer (not shown) input through the repeater 30 into a channel bit string requested by the DVD-RAM. The optical controller 36 interrupts the light source included in the pickup 32 in accordance with the logical value of the channel bit string from the recording signal processor 34 so that the user information is recorded in the data area of the DVD-RAM. A detection signal processor 38 is connected to the pickup 32, and a reconstruction signal processor 40 and an address detector 42 are commonly connected to the detection signal processor 38. The detection signal processor 38 detects an RF signal from an electrical signal from a photodetector (not shown) included in the pickup 32. The reconstruction signal processor 40 recovers the user information by detecting the channel bit string from the RF signal from the detection signal processor 38 and decoding and error correcting the detected channel bit string. The user information restored by the reconstruction signal processor 40 is supplied to the host computer via the repeater 30. The address detector 42 detects a physical address from the RF signal from the detection signal processor 38.

In addition, the DVD-RAM driver further includes first to third registers 44, 46, and 48 for storing physical addresses, respectively. The first and second registers 44 and 46 store the target physical address TPID and the ending physical address EPID from the microcomputer 50, respectively. The ending physical address EPID is calculated by converting the ending logical address ELID by the microcomputer 50. The third register 48 temporarily stores the read physical address (RPID) from the address detector 42, and stores the stored read physical address (RPID) with the first and second comparators 52, 54 and the microcomputer. It is supplied to 50. The first comparator 52 compares the values of the target physical address TPID and the read physical address TPID stored in the first and third registers 44 and 48, respectively, to obtain a constant positive logical value if the value is the same, or a negative logical value. A first comparison signal CS1 having a is generated. Each time the first comparison signal CS1 having the positive logic value from the first comparator 52 is deactivated, the first register 44 increases the target physical address RPID by "1". The second comparator 54 also compares the values of the end physical address EPID and the read physical address RPID stored in the second and third registers 46 and 48, respectively, and if the end physical address EPID is large, positive logic. Otherwise, a second comparison signal CS2 having a negative logic value is generated. The AND gate 56 for inputting these first and second comparison signals CS1 and CS2 has a drive enable signal DEN having a positive logic value when both comparison signals CS1 and CS2 have a positive logic value. ) Will occur. By the drive enable signal DEN having this positive logic value, the recording signal processor 34 or the reproduction signal processor 40 is operated. In detail, the recording signal processor 34 has a user from the repeater 30 when both the driving enable DEN and the first standby enable signal SEN1 from the microcomputer 50 have positive logic values. The information is converted into a channel bit string. Similarly, the reproduction signal processor 40 also recovers the user information from the RF signal when both the driving enable DEN and the second standby enable signal SEN2 from the microcomputer 50 have positive logic values. do. The microcomputer 50 outputs the first or second standby enable signal SEN1 or SEN2 having a positive logic value in response to a recording or reproducing command input from the host computer via the repeater 30. Or the reproduction signal processor 40. In addition, the microcomputer 50 calculates a target physical address TPID and an ending physical address EPID for the start logical address ALID and the end logical address ELID from the host computer, and calculates the calculated target physical address ( TPID and end physical address (EPID) are loaded into the first and second registers, respectively.

FIG. 5 illustrates a procedure of a recording medium access method according to an embodiment of the present invention performed by the microcomputer 50 shown in FIG.

According to Fig. 5, the microcomputer 50 is in a command standby state until a recording or reproducing command is input from the host computer via the repeater 30 (step 33). When the recording or reproducing command is input from the host computer in step 33, the microcomputer 50 may enable the first standby enable having a positive logic value in the recording signal processor 34 or the reproduction signal processor 40 according to the input command. By supplying the signal SEN1 or the second standby enable SEN2, the recording signal processor 34 or the reconstruction signal processor 40 enters the operation standby state (step 35). In addition, the microcomputer 50 inputs the start logical address (SLID) for the first sector and the end logical address (ELID) for the last sector of the sectors to be accessed from the host computer, and accesses, that is, the number of sectors recorded or reproduced. The counting first access counter M is initialized to " 0 " (step 37). As the first access counter M, any one of registers included in the microcomputer 50 is used. The microcomputer 50 updates the target logical address TLID to the starting logical address to set the sector on the DVD-RAM to be recorded or reproduced (step 39). The microcomputer 50 converts the physical address corresponding to the target logical address TPID, searches for the first and second defect management tables PDT and SDT as shown in FIG. 1, and converts them according to the search result. The starting physical address (SPID) is calculated by adjusting the logical value of the physical address. In addition, the microcomputer 50 may use the first and second defect management tables PDT and SDT to determine the end physical address (EPID) for the last one of the sectors that are continuously accessible from the sector corresponding to the start physical address (SPID). ) Is calculated (step 41). This ending physical address (EPID) corresponds to the ending logical address (ELID) when there are no defects in the number of sectors corresponding to the difference between the starting physical address (SPID) and the starting and ending logical addresses (SLID, ELID). On the other hand, if there is at least one primary defect or secondary defect among the number of sectors corresponding to the difference between the starting physical address (SPID) and the starting and ending logical addresses (SLID, ELID), the ending logical address (ELID). It does not correspond to.

The starting physical address SPID calculated by the microcomputer 50 is loaded into the first register 44 as the target physical address TPID and the ending physical address EPID is loaded into the second register 46. (Step 43). The third register 48 loads the read physical address (RPID) from the address detector 42 and supplies it to the first and second comparators 52 and 54 (step 45). The first comparator 52 checks whether the values of the target physical address TPID from the first register 44 and the read physical address RPID from the third register 48 are the same, so that the pickup 32 can be accessed. It is checked whether it is located in the sector (step 47). Here, when both physical addresses TPID and RPID are not the same, the AND gate 56 for inputting the first comparison signal CS1 from the first comparator 52 is a drive enable signal DEN of a negative logic value. On the contrary, when both physical addresses (TPID, RPID) are the same, the AND gate 56 generates a drive enable signal DEN of positive logic value. If both physical addresses (TPID, RPID) are not the same, the microcomputer 50 is connected to the drive enable signal DEN from the AND gate 56 and the read physical address RPID from the third register 48. In response, the position of the pickup 32 on the DVD-RAM is adjusted (step 49). These 45th through 49th steps are to be performed repeatedly until the pickup 32 is located in the first of the sectors to be accessed.

Among the recording signal processor 34 and the reproduction signal processor 40 which commonly input the drive enable signal DEN from the AND gate 56 when the target physical address TPID and the read physical address RPID are the same. Either one is driven so that the DVD-RAM is recorded or reproduced (step 51). The first register 44 increases the value of the target physical address TPID in itself by " 1 " by the first comparison signal CS1 from the first comparator 52 (step 53). In addition, the second comparator 54 checks whether the value of the read physical address RPID from the third register 48 is greater than the value of the end physical address EPID from the second register 46, and records or reproduces it. It is determined whether this is completed (step 55). When the read physical address (RPID) is not larger than the end physical address (EPID), steps 51 to 55 are repeatedly performed to correspond to all addresses from the start logical address SLID to the end logical address ELID. Recording or playback is performed continuously for sectors on the DVD-RAM.

When the read physical address RPID is greater than the end physical address EPID, the microcomputer 50 responds to the second comparison signal CS2 of the negative logic value from the second comparator 54 and the first access counter M. FIG. ) Is increased by the difference between the end physical address EPID and the start physical address SPID (step 57). Subsequently, the microcomputer 50 checks whether the value of the first access counter M is greater than the difference between the end logical address ELID and the start logical address SLID, so that there is a sector to be recorded or reproduced, i.e., recording or It is determined whether playback is completed (step 59). When the value of the first access counter M is smaller than the difference between the end logical address ELID and the start logical address SLID, the microcomputer 50 returns the previous end physical address and the previous start physical address to the target logical address. And a difference value are added to calculate a new target logical address (TLID). The microcomputer 50 then performs a new starting physical address (SPID) corresponding to the new target logical address (TLID) as in step 39 and a new ending physical address (EPID) for the last one of the consecutively accessible sectors therefrom. (Step 61). In addition, the microcomputer 50 loads the new starting physical address SPID into the first register 44 as the target physical address TPID and also loads the new ending physical address EPID into the second register 46. (Step 63). After performing the 63rd step, the 45th to 59th steps are sequentially performed. On the other hand, when the difference between the end physical address EPID and the start physical address SPID is smaller than the value of the first access counter M, the microcomputer 50 enters the thirty-third step waiting for a command from the host computer. . As a result, steps 43 to 63 are repeated until the difference between the end physical address EPID and the start physical address SPID is equal to the difference between the end logical address ELID and the start logical address SLID. Allow the computer to complete recording or playback of the specified sectors.

6 illustrates a procedure of a recording medium access method according to another embodiment of the present invention performed by the microcomputer 50 shown in FIG. The flowchart of FIG. 6 has the same procedure as the flowchart of FIG. 5 except for including the sixty-fifth to seventy-first steps instead of the fifty-first to fifty-fifth steps in FIG.

In step 65 of FIG. 6, the microcomputer 50 determines a difference value between the end physical address EPID and the start physical address SPID in response to the driving enable signal DEN of the positive logic value from the AND gate 56. It loads into the 2nd access counter N which counts the number of sectors to be accessed. As the second access counter N, any one of registers included in the microcomputer 50 is used. In addition, when the target physical address TPID and the read physical address RPID are the same, the write signal processor 34 and the reproduction signal processor 34 which input the drive enable signal DEN from the AND gate 56 in common. 40. One sector on the DVD-RAM is recorded or reproduced by any one of 40) (step 67). At this time, the first register 44 increases the value of the target physical address TPID in itself by "1" by the first comparison signal CS1 from the first comparator 52. Subsequently, the microcomputer 50 subtracts the value of the second access counter N by "1" (step 69). In addition, the microcomputer 50 determines whether the sector corresponding to the ending physical address EPID is accessed by checking whether the value of the subtracted second access counter N is "0" (step 71). . At this time, when the value of the second access counter N becomes "0", the microcomputer 50 enters the 57th step. On the contrary, if the value of the second access counter N is not "0", the microcomputer 50 proceeds to step 65. To be performed. As a result, steps 65 to 71 are repeatedly performed until all sectors corresponding to the physical address from the starting physical address SPID to the ending physical address EPID are accessed.

7A to 7C schematically show recording sections on a DVD-RAM which are inhibited by the recording medium access methods of FIGS. 5 and 6. FIG. 7A shows a case where there are no defects in sectors corresponding to logical addresses from the starting logical address SLID to the ending physical address ELID. In this case, the recording or reproducing operation is completed at once without interruption.

Fig. 7B illustrates a recording or reproducing operation state in the case where there are primary defects in sectors corresponding to logical addresses from the starting logical address SLID to the ending logical address ELID. In this case, the recording or reproducing operation is stopped once in the sector of the primary defect. Recording or playback proceeds from the next sector to the last sector of this primary defect sector.

Fig. 7C describes the recording or reproducing operation state in the case where there are secondary defects in sectors corresponding to logical addresses from the starting logical address SLID to the longitudinal logical address ELID. In this case, the recording or reproducing operation proceeds first from the sector corresponding to the starting logical address (SLID) to the sector before the block containing the sector, and then to the sectors in the replacement block far from the defective block. It will be secondary to. After the recording or reproducing operation is completed for the sectors in the replacement block, the recording or reproducing operation is sequentially performed from the sector following the defective block to the sector corresponding to the ending logical address ELID.

As described above, the recording medium access method and apparatus according to the present invention allows the recording or reproducing operation to be temporarily stopped only in the defective unit recording section, and the recording or reproducing operation is continuously performed in other unit recording sections. . Accordingly, the recording medium access method and apparatus according to the present invention can stably record or reproduce information on the recording medium in which the defective area exists.

In addition, the recording medium access apparatus according to the present invention continuously controls the operations of the recording signal processor and the reproduction signal processor by using a comparator corresponding to the read physical address, the start physical address, and the end physical address. Free design

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (4)

A recording medium access method for accessing a recording medium containing defective unit recording sections using defect information, the method comprising: Inputting a start address and an end address for unit recording sections to be accessed on the recording medium; Retrieving the combined unit recording sections existing between the unit recording section corresponding to the start address and the unit recording section corresponding to the end address by the defect information; And continuously accessing the unit recording sections from the unit recording section corresponding to the start address to the unit recording sections corresponding to the end address while skipping the defective unit recording sections searched. Record carrier access method. A recording medium access method for accessing a recording medium containing defective unit recording sections using defect information, the method comprising: A first step of inputting a start address and an end address for unit recording sections to be accessed in the recording medium; Checking whether there is a defective unit recording section in the unit recording sections from the unit recording section corresponding to the start address to the unit recording section corresponding to the ending address, based on the defect information; Continuously accessing the unit recording sections from the unit recording section corresponding to the start address to the unit recording section corresponding to the ending address while skipping the defective unit recording section if the defective unit recording section exists; , And continuously accessing the unit recording sections from the unit recording section corresponding to the start address to the unit recording section corresponding to the ending address when there is no defective unit recording section. . A recording medium access method for accessing a recording medium containing defective unit recording sections using defect information, the method comprising: Access means for accessing the recording medium; Address input means for inputting a first start address and a first end address for the unit recording sections to be accessed in said recording medium; On the basis of the defect information, it is detected whether there is a defective unit recording section in the unit recording sections from the unit recording section corresponding to the first start address to the unit recording section corresponding to the first end address. Address generating means for selectively generating at least one or more pairs of second start addresses and second end addresses; Drive control means for continuously driving said access means in response to a first start and first end address from said address input means and said at least one or more second start address and second end address from said address generating means; A recording medium access device, characterized in that provided. A recording medium access apparatus for accessing a recording medium containing defective unit recording sections using defect information, the apparatus comprising: Reproducing means for reproducing the information recorded on the recording medium; Recording means for recording information on the recording medium; Address detecting means for detecting an address recorded on the recording medium; Address input means for inputting a first start address and a first end address for unit recording sections to be accessed among the unit recording sections of the recording medium; On the basis of the defect information, it is detected whether there is a defective unit recording section in the unit recording sections from the unit recording section corresponding to the first start address to the unit recording section corresponding to the first end address. Address generating means for selectively generating at least one or more pairs of second start addresses and second end addresses; A counter for loading any one of said first start address from said address input means and said at least one or more second start addresses from said address generating means and counting up the loaded start address; Storage means for temporarily storing one of the first end address from the address input means and the at least one second end address from the address generating means; First comparing means for comparing the address from the address detecting means with the output signal of the counter and driving either one of the reproducing means and the recording means according to the comparison result; A second comparison between the address from the address detecting means and the ending address stored in the storing means, so that a new starting address is loaded into the counter and the new ending address is stored in the storing means according to the comparison result; A recording medium recording / reproducing apparatus comprising a comparison means.