JPH0223531A - Data erasing system and recording medium for re-writable recording and reproducing device - Google Patents

Abstract

PURPOSE:To treat the recording unit of a registered identification number as erased at the time of reproduction so as to improve the reliability of the erasing process by registering the identification number of the recording unit which has become an object to be erased in a specific management area on a recording medium when the data erasing operation on the recording medium fails. CONSTITUTION:Delivery and reception of recording and reproduced data 3 are performed between the host device 1 of a re-writable type magneto-optical disk device and a recording and reproduction controller 2 and the controller 2 makes a completion report 5 against a READ/WRITE instruction 4. Moreover, an access controller 9 controls an optical head 12 in accordance with the instruction 10 of the controller 2 and a magnetic head driver 14 set the magnetizing direction of a magnetic head 13 prior to the recording and erasing operations of the head 13 in accordance with WRITE magnetizing direction designation 15 are erasure magnetizing direction designation 16. Then a laser power controlling section 17, out-of-track detection circuit 27, selector ID discrimination circuit 34, etc., treat the recording unit of an identification number registered in a specific area of a recording medium as erased at the time of reproduction.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a data erasing method and a recording medium of a recording/reproducing device using a rewritable optical disk such as a magneto-optical disk, and particularly relates to a data erasing method and a recording medium for a recording/reproducing device using a rewritable optical disk such as a magneto-optical disk. update and delete
The present invention relates to a highly reliable data erasing method for a rewritable recording/reproducing device and a recording medium.

[Conventional technology]

Conventionally, as a data rewriting method in a rewritable optical disk recording/reproducing device, for example, Japanese Patent Application Laid-Open No. 283073
As described in the publication, there are the following methods (1) and (2).

(1) Like conventional magnetic disk devices, information data is recorded in each sector, and if a recording defective sector is detected in a read check after recording, a pleated data mark signal is written in the recording defective sector, Information data is recorded in the correspondence sector.

(2) track defect detection means for detecting burst errors due to dirt, defects, etc. on information tracks from the reflected light of the laser beam for erasing, and recorded data signals such as laser modulated signals for recording and pleated data indicating defective sectors. If the track defect detection means detects an abnormality in the information sector, the recording laser modulation signal is set to the pleated data mark signal to invalidate the corresponding sector. Rewrite recorded data to the next sector.

[Problem to be solved by the invention]

The above-mentioned conventional technology only takes into consideration measures to be taken when writing of up data fails, but does not take any consideration to what to do when writing of pleated conflict data/pattern fails. The following factors can be cited as causes for failure in writing pleated data patterns.

(1) The identification number of the recording unit in which the pleated data φ pattern is written cannot be detected. pleated
Data patterns are written in recording units (for example, sector units), so if this identification number cannot be detected, the pleated fist data pattern cannot be written. (2) The pleated skewer data pattern is being written. , writing was stopped because a track misalignment was detected that could affect the data on the adjacent track.0 This track misalignment is caused by defects or deposits on the medium, which prevent reflected light from being detected properly. This is the ninth occurrence where the tracking servo does not work properly.

As a result, the following problems occurred.

<1) In the case of (1) above, in order to increase the reliability of the data, in a device that records the identification number of the recording unit in the data of the recording unit (for example, sector unit), during playback, the recording in the data Since the identification number of the recording unit is determined based on the identification number of the recording unit and the data is reproduced, data cannot be erased◇ (2) In the case of (2) above, the data of the recording unit to be erased remains. A data error occurs during playback.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, prevent data erasing operation failures, and effectively perform data erasing operations even when the deletion pattern is not written sufficiently or the erasing operation is insufficient. An object of the present invention is to provide a data erasing method and a recording medium for a reproducing device that can be regarded as having been used in the past.
Means for Solving the Problem] In order to achieve the above object, the present invention is configured so that when a data erasing operation on a recording medium fails, a sector that is to be erased is handled as having been erased. do. That is, when it is determined that erasure has failed, K registers the identification number of the failed sector in a specific management area on the recording medium. As a result, the recording/reproducing device treats the sector with this identification number as having been erased from now on. ◇ As a means of determining whether or not erasing has failed, if the identification number of the sector to be erased cannot be detected, the corresponding sector will be treated as a sector that has failed to be erased. means (first determination means) for determining that the corresponding sector has failed in erasing when it is determined that data exists in the read signal by confirming readout after the erase operation is completed (second determination means); Either or both of these methods can be adopted.

In the present invention, "erase failure" refers to the case where the pleated data pattern could not be written sufficiently as described above, as well as the case where the data itself (magnetic ) This includes cases in which erasure has been sufficiently performed. [Operation] The operation based on the above configuration will be explained.

When it is determined that the data erasing operation on the recording medium has failed, the identification number (
sector number) is registered in a specific management area on the recording medium. From then on, the recording/reproducing apparatus treats the nine sectors with this identification number as having been erased. Therefore, in subsequent processing, this erased sector becomes an invalid sector. As a result, even if the original sector cannot be erased, the target sector can be treated as having been erased.

〔Example〕

An embodiment in which the present invention is applied to a rewritable magneto-optical disk device will be described below with reference to FIGS. 1 to 4. FIG. 1 is a block diagram of a rewritable magneto-optical disk device according to this embodiment.

1 is a higher-level device (host) CPU), which exchanges recording/reproducing data 3 with the host computer 22, and responds to the READ/WRITFi command 4 from the higher-level device 1.
The recording/playback controller 2 is the
02 is the recording/playback controller that performs the completion report 5 for the i instruction)
The CS-RA operates each component of the optical disk device according to a predetermined procedure in response to instructions 4 from the host device 1, and is configured mainly by a microprocessor.

Reference numeral 7 is a buffer memory having a data capacity for a plurality of sectors, in which the reproduced data is temporarily stored in a data storage for recording. 6 is a program memory of the microprocessor of the recording/reproducing controller.

Reference numeral 8 is a memory that stores the sector identification number (hereinafter referred to as ID) of the erase failure sector. ◇ Reference 9 is an access controller, and according to the command 10 from the recording/reproduction controller 2, the optical spot is positioned on the track where recording/reproduction is to be performed. O13 is a bias magnetic head that controls the optical head 12 and reports its completion 11. Prior to the operation of erasing a record, the optical head 12 receives a W RT from the recording/reproducing controller 2.
('ii included) a north f8 instruction 15 ya, WR8 (f
i) According to the magnetization direction instruction 16, the magnetization direction is set in the magnetic head 2-14. For example, when erasing, all magnets are uniformly magnetized in the "1" direction, and if a bias magnetic field is applied in the opposite direction to the 9 state, and light is irradiated only when writing "IO", the magnetization is reversed and data is written. It is something that can be done.

Reference numeral 17 denotes a laser power control section, and when any one of the WR, ITE instruction 18, DEiLET\B instruction 19, and ERA8E instruction is instructed from the recording/reproduction controller 2, the laser power control section responds to the WRPLS (write pulse) 21. Then, the laser write current 5 is continuously outputted from the laser fL￥C.
superimposed on the opposite. The track deviation detection circuit 4 is connected to the optical head 1
The off-track signal from I5 (obtained by detecting the reflected light of the writing beam) from I5 is monitored, and the off-track signal from I5 is monitored.
! If track deviation is detected while superimposing 5, WRT
8TOP (write stop) signal 2 is output from the laser power control unit 171C to stop the superposition of the laser write current.

The write selector 24 switches the input of the WRPLS signal 21 according to instructions from the recording/reproducing controller 2. That is, in the case of WRITE instruction 18, the output obtained by modulating the WRITE data 41 with the WR data modulation circuit n is selected,
In the case of DELETE instruction 19, the output of the DFJLETE pattern generation circuit 42 is selected, and in the case of FliRA8W instruction I, "1" output is selected at the time of instruction. The DELETE pattern generation circuit 42 continuously generates special patterns (delete patterns) as shown in FIG.

The data reproducing amplifier (equipment) amplifies the data read signal from the optical head 12, and the data demodulating circuit 32. Data presence/absence determination circuit. DELETB pattern judgment circuit 40.8M
A binary signal is output to the (sector mark) detection circuit 31 at a slice level suitable for each.

FIG. 3 shows a sector 7 format. In Figure 3, SM
is sector mark, PA is postamble, ID1~ID
3 is the sector identification number, AM is the address mark, VFO is the variable frequency oscillator frequency tuning signal, ALPC is I8
0 standard, B is byte (1 byte is 1.08μS)
It is.

The 8M detection circuit 31 outputs an 8M0UT signal by detecting a special pattern indicating the beginning of a sector from a read signal from a medium with a sector format as shown in FIG. RE output of amplifier luster
It is demodulated as AD DATA 36, and the sector ID detection circuit A inputs READ DATA 36 and 8M signal A, determines the sector ID, and outputs the ID number correction. It should be noted that the 8M signals input to the circuits n to A are for timing.

The data presence/absence determining circuit counts the number of pulses generated in the data portion of one sector and is being output from the data reproducing amplifier, and if there are 256 or more pulses, it is determined that data is present and outputs the result.

When the DBLFliTg pattern judgment circuit is off, the judgment circuit detects 128 or more DELlliliTB patterns in a sector (the specified total number is 300 in one sector).
FIG. 4 shows an area map on the magneto-optical recording medium.

The track number is O~18752. Sector number is 0-16
The identification number (ID) of each sector is this combination. Track numbers 0 to 18656 are user areas, 18657 to 18736 are replacement track areas for writing data in sectors that have failed in WRITE, and 18737 to 18752 are identification numbers (track number, sector number) of sectors in which erasing has failed. ) is the area to register.

Next, the operation of this embodiment will be explained.

First, a case where the DELETE pattern is not used will be described.

The sequence of erasing data is not particularly related to the present invention, so it will not be described here.

When attempting to erase the data in the sector of track number 100#sector number 10, it is determined that erasing has failed due to any of the following conditions (13(2)).

(1) The erase operation was not performed because the sector ID determination circuit could not detect the ID of the sector. (2) The read check after performing the erase operation determined whether there was data in the sector. The circuit (determined that there is data).

The recording/reproduction controller 2 assigns track number 100. as an erasure failure sector to empty area track number 18737 sector number O in the erasure failure sector management area of the recording medium.
At the same time as sector number 10 is written, the same track number is written to the erase failure registration memory 8.

Stores sector number. RBA from subsequent hosts
For D command, according to the contents of the erase failure registration memory,
Track number 100. Sector number 10 is treated as an erased sector. (9) Since the magneto-optical disk is a replaceable recording medium, the recording/reproducing controller 2 performs RBAD every time the recording medium is replaced.

Prior to execution of the WRITE command, the contents of the erase failure sector management area are stored back into the erase failure registration memory 8. In this way, we have created an area that uses a part of the recording medium to store the erase failure sector number, so even when replacing the recording medium or reading the recording medium with a different capacity, processing can be done immediately according to the registered contents. be able to.

Next, we will discuss the case where the %DELETIu pattern is used.@Conditions for deletion failure include C1), (2) above.
Let us consider the case of (1), and assume that the same processing as above (storage processing to memory) is performed. Regarding (2), the recording/playback controller 2 has track number 100. Deliver DELBTE instruction 19 to sector number 10 and DEIJTE
Attempt to write a pattern. After that, data is read from the sector, and the DELETE pattern determination circuit 40Vc reads DRLgTB MA for the sector.
If the RK signal is output, this sector is treated as erased. If DELETE MARK39 is not output, track number 100. is written in both the erase failure sector management area and the erase failure registration memory as in (1). Praise sector number 10.

As described above, according to the present embodiment, sectors in which data erasure has failed can be treated as having been erased, and data erasure failures can be substantially eliminated.

tX, by folding a special pattern or special flag indicating that the data has been erased into the sector where the data erasure process has failed, it is possible to reduce the number of entries in the "FR, ASg failure management area" and to regenerate the recorded data. As described in detail above, according to the present invention, when data erasing operation on a recording medium fails, the identification number of the nine recording units (sectors) to be erased is identified by a specific management on the recording medium. By being registered in the area, the recording unit (sector) with this registered identification number is treated as having been erased during playback, so it means that the data has actually been definitely erased, and the data cannot be erased. Processing reliability can be significantly improved, etc.
0 with excellent effects

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a block diagram of a delete pattern, FIG. 3 is a block diagram of a sector format, and FIG. 4 is a state diagram of an area map on a recording medium. 1... Host device, 2... Recording/playback controller, 6... Program memory, 7...
... Data buffer, 8 ... Lover failure registration memory, 9 ... Access controller, 12 ...
...Optical head, 13...Bias magnetic head, 14...Magnetic head driver, 17...
...Laser power control section, n...Write data modulation circuit, field...Always @1" output generation circuit, function...Write selector, nail...・Track misalignment detection circuit, blade...Data playback amplifier, 3
1...8M detection circuit, n...data demodulation circuit, oh...data presence/absence determination circuit, equipment...
. . . Sector ID determination circuit, ω . . . Delete pattern determination circuit, 42 . . . Delete pattern generation circuit. Agent: Patent attorney Junji Takeshi (1 other person) / Figure 2, Figure 3

Claims (1)

[Scope of Claims] 1. In a data erasing method of a rewritable recording and reproducing device having means for erasing data recorded on a recording medium for each recording unit, whether erasure by the data erasing means fails? and a registration means for registering in a specific area on the recording medium an identification number of a recording unit for which erasure has been determined to have failed by the determination means. A data erasing method for rewritable recording and reproducing devices. 2. The determining means includes a first determining means that determines the recording unit to be erased as a failure when the identification number of the recording unit to be erased cannot be detected; 2. The data erasing method for a rewritable recording/reproducing device according to claim 1, further comprising one or both of second determining means for determining that the recording unit has failed to erase when it is determined that the recording unit exists. . 3. It is characterized by comprising a user data recording area, a replacement area in which data that has failed in writing is written, and an erasure failure recording unit management area in which the identification number of the recording unit in which erasure has failed is registered. Rewritable recording medium.