JP2002015507A - Method for recording data and disk drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly record data by preventing the data which is erased temporarily when the data are recorded from being lost. SOLUTION: When data recording and reproducing are performed in a physical sector unit, that is larger than a logical block in the case of recording the data on an optical disk 10 in a logical block unit, the data of a physical sector where a part of the data read in the physical sector unit are replaced with data to be recorded are read to a buffer memory 29. Data that cannot be replaced with the data to be recorded in the data of the memory 29 are copied to a nonvolatile memory 40. Record data in the physical sector unit are generated from the data of the memory 29 and the data to be recorded, and the record data are recorded by erasing data at the recording position on the disk 10 in the physical sector unit. Since the data temporarily erased from the disk 10 are stored in the memory 40, the data to be temporarily erased can be re-written in the disk 10, even if data recording operation is interrupted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a data recording method and a disk drive. Specifically, when data is recorded on a disk-shaped recording medium, the data recorded on the disk-shaped recording medium is read out, and a part of the read data is replaced with data to be recorded and written back. By reading from the non-volatile memory the data which is not replaced by the data to be read and the recording position information of the data,
Even if the data recording operation is interrupted, the data to be written back to the disk-shaped recording medium is prevented from being lost.

[0002]

2. Description of the Related Art In a disk-shaped recording medium, for example, an optical disk, the larger the physical sector size, the smaller the header area for recording the address on the disk, and the larger the data recording capacity. On the other hand, since data recording and reproduction are performed in units of physical sectors, when the physical sector size is large, the data amount when performing recording and reproduction is large. For this reason, a physical sector is divided into a plurality of logical blocks, and recording and reproduction can be performed in logical block units.

FIG. 7 shows a case where one physical sector is divided into four logical blocks. Here, for example, FIG.
When a command to read data of the logical block addresses “B1” to “B13” shown in FIG. A is supplied from the computer device to the optical disk device, the physical sector “PS0” including the data of the logical block addresses “B1” to “B13” is provided. After reading the data of “PS3” to “PS3”, the logical block address “B1” shown in FIG. 7B is obtained from the read data of the physical sectors “PS0” to “PS3”.
Data "d1" to "d13" to "B13" are selected and transferred to the computer device.

Further, the logical block addresses "B1" to
When data is recorded in “B13”, since writing of data to the optical disk must be performed in physical sector units, the logical block addresses “B0” and “B14” are used.
The data of "B15" must also be recorded.

Therefore, the logical block address "B0"
In order to make the data “B14” and “B15” equal to the state before data recording, as shown in FIG. 8A, from the optical disk on which data is recorded, as shown in FIG. , A physical sector in which data to be recorded in the physical sector is mixed, ie, the physical sector “PS”
0 ”,“ PS3 ”data“ d0 ”to“ d3 ”,“ d1 ”
2 "to" d15 ".

Furthermore, data "e" to be newly recorded at logical block addresses "B1" to "B13" shown in FIG.
"1" to "e13", and the logical block addresses "B0" and "B14" that hold the pre-recorded state already read.
Using the data “d0”, “d14”, and “d15” of “B15”, as shown in FIG. 8D, recording data for performing data recording in physical sector units is generated. Thereafter, by erasing the data in the physical sectors “PS0” to “PS3” and then recording the data for recording, the data can be recorded in the logical block addresses “B1” to “B13”.

[0007] As in the physical sectors "PS0" and "PS3", the operation of reading data once, changing its contents, and then writing it again is called a read-modify-write operation.

[0008]

When the boundary of the specified logical block address does not coincide with the boundary of the physical sector during data recording, the above-described read-modify-write operation is performed to maintain the state before recording. The data to be read is read from the optical disk and held in the buffer memory.

Here, in order to record the generated recording data on the disk, the already recorded data is erased, and before the writing of the generated recording data is completed, the power supply to the optical disk device is stopped. If the supply is stopped, the data stored in the buffer memory will be lost. Further, since the data recorded on the optical disk has been erased, there is a possibility that the lost data cannot be restored.

In view of the above, the present invention provides a data recording method and a disk device which can prevent data temporarily erased during data recording from being lost and can correctly record data.

[0011]

According to the data recording method of the present invention, when data is recorded on a disk-shaped recording medium in a logical unit, the data recorded on the disk-shaped recording medium is compared with a logical unit. A data recording method in which data is read out in a large physical unit, a part of the read data is replaced with data to be recorded, and then written back in a physical unit again. The non-replaceable data and the recording position information indicating the recording position of the data on the disk-shaped recording medium are stored in the nonvolatile memory.

Further, the disk device includes a recording / reproducing means for recording / reproducing data on / from the disk-shaped recording medium, a non-volatile memory for storing data read from the disk-shaped recording medium, a recording / reproducing means, Control means for controlling the operation of the non-volatile memory, wherein the control means controls the recording / reproducing means to record data in logical units on the disc-shaped recording medium, and the data is recorded on the disc-shaped recording medium. Data shall be read out for each physical unit larger than the logical unit, and a part of the read data shall be replaced with data to be recorded and then written back for each physical unit. Data read from the disk-shaped recording medium and not replaced by the data to be recorded, and a recording position indicating the recording position of the data on the disk-shaped recording medium It is intended to store the broadcast.

In the present invention, for example, when data is recorded on an optical disk in units of logical blocks, data recorded on the optical disk is read in units of physical sectors larger than the logical blocks. After a part of the data read in units of the physical sector is replaced with the data to be recorded, the data is written back again in the unit of the physical sector, and the data which is not replaced by the data to be recorded is written on the optical disk. It is stored in the nonvolatile memory together with the recording position information indicating the recording position. The nonvolatile memory also stores the identification information of the optical disk on which the data stored in the nonvolatile memory has been recorded.

Here, after a part of the read data is replaced with the data to be recorded, when the process of writing back in physical sector units is completed again, the data stored in the nonvolatile memory and the recording of this data are recorded. The location information is deleted.

When the recording of data is interrupted and resumed, and when the identification information of the optical disc matches the identification information stored in the nonvolatile memory, the data stored in the nonvolatile memory is transferred to the optical disc. Written back. Further, when the identification information is different from the case where the identification information matches, a notification is given indicating that the data that has not been written back is stored in the nonvolatile memory.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of an area configuration of the magneto-optical disk 10, for example. On the outermost peripheral side of the magneto-optical disk 10, a lead-in zone is provided as shown in FIG. 1A. From the lead-in zone to the inner peripheral side, an SFP (Standard Formatted Part) zone, a manufacturer use zone, a user zone, a manufacturer use zone, an SFP zone, an SFP transition zone, a PEP (Ph
ase Encode Part) Each zone is provided.

The lead-in zone is an area formed by emboss pits.

The SFP zone is an area in which information on media such as sensitivity and reflectance, and information on systems such as the number of tracks are recorded. In the SFP zone, disc-specific identification information MID for enabling disc identification is recorded. The manufacturer use zone is an area used when a manufacturer performs a test on a disc or when an optical disc apparatus tests recording / reproducing conditions.

The user zone is an area used for recording and reproducing data. As shown in FIG. 1B, a data area in which data is recorded and reproduced and a replacement sector described later are used instead of a defective sector in the data area. And a spare area used in place of a defective sector in the data area.

The SFP transition zone is a boundary area between an area in a PEP format without a groove and an SFP zone in which a groove is provided and servo information is recorded. The PEP zone includes the rotation mode of the disk, the signal modulation method, the number of sectors per track in the user zone, the land recording /
This is an area in which control information indicating groove recording classification, disc type, and the like is recorded.

Next, FIG. 2 shows the overall configuration of an optical disk apparatus using the above-described magneto-optical disk 10. The magneto-optical disk 10 is rotated at a predetermined speed by a spindle motor unit 21. The spindle motor unit 21 is driven by a spindle drive signal SSD from a servo control unit 24 described later so that the rotation speed of the magneto-optical disk 10 becomes a predetermined speed.

The magneto-optical disk 10 is irradiated with a laser beam whose light amount is controlled from an optical pickup section 22 of the optical disk device 20. The laser light reflected by the magneto-optical disk 10 is applied to a light detection processing circuit (not shown) of the optical pickup unit 22. In the light detection processing circuit,
It performs photoelectric conversion, current-voltage conversion, and the like, generates a reproduction RF signal SRF based on the reflected light, and supplies it to the read channel block 23. Further, a tracking error signal STE and a focus error signal SFE are generated and supplied to the servo control unit 24.

In the read channel block 23, the reproduction R
The read clock CLK and the decoded signal RD are generated from the F signal SRF and supplied to the signal processing unit 25.

The servo control unit 24 adjusts the objective lens (not shown) of the optical pickup unit 22 based on the supplied focus error signal SFE so that the focal position of the laser beam is located on the magneto-optical disk 10. A focus drive signal SFD for driving is generated, and an optical pickup unit 22 is generated.
To an actuator (not shown). Further, based on the supplied tracking error signal STE, a tracking drive signal STD for driving the objective lens of the optical pickup unit 22 is generated such that the irradiation position of the laser beam is located at the center of the desired track, Optical pickup 2
To the second actuator.

When recording data on the magneto-optical disk 10, the servo control unit 24 supplies a magnetic head drive signal SMH to the magnetic head 27 and
7, a DC external magnetic field is applied to the laser beam irradiation position of the magneto-optical disk 10.

Further, the servo control section 24 generates and supplies a setting signal SPC for setting the output level of the laser light to a laser light output control section 26, which will be described later. A signal SSD is generated and supplied to the spindle motor unit 21. In addition, sled operation control for moving the optical pickup unit 22 in the radial direction of the magneto-optical disk 10 is also performed so that the irradiation position of the laser light emitted from the optical pickup unit 22 does not exceed the tracking control range.

In the signal processing unit 25, the read clock CL
K, the decoded signal RD is decoded, and the obtained signal is used as output data Dout as SCSI (Small Comp
uterSystem Interface) and ATAPI (AT Attachment Pa)
The data is supplied to a computer device or the like via an interface unit 28 corresponding to a standard such as a cket interface. A buffer memory 29 is connected to the signal processing unit 25 so that data read from the magneto-optical disk 10 can be temporarily stored. Further, when input data Din is supplied from a computer device or the like via the interface unit 28, the input data Din
And supplies the obtained recording signal WD to the laser light output control unit 26. Also, the input data Din
Is recorded on the magneto-optical disk 10, a read-modify-write operation is performed by using the data held in the buffer memory 29.

The laser light output control unit 26 controls the irradiation of the laser light to the magneto-optical disk 10 based on the supplied recording signal WD, and sets the output level of the laser light from the servo control unit 24. A laser drive signal SLD is generated so as to have an output level based on the signal SPC, and a laser diode (not shown) of the optical pickup unit 22 is generated.
To supply.

The CPU (Central Processing Unit) 30 is connected to a read channel block 23, a servo control unit 24, a signal processing unit 25, and a laser beam output control unit 26 via a bus 35, and is also connected to a ROM 31 and a RAM 32. Have been. The CPU 30 executes a program stored in the ROM 31 to generate a control signal CT in accordance with the command, for example, when a command is supplied from a computer device via the interface unit 28 or the signal processing unit 25 to perform servo control. Control unit 24 and signal processing unit 25
And the like, thereby controlling each unit so that the optical disk device 20 performs an operation according to the command. Information required for performing various operation controls is RA
M32 is temporarily stored.

Further, a nonvolatile memory 40 is connected to the bus 35.
Is connected, and data and the like read from the magneto-optical disk 10 and used for the read-modify-write operation are stored. Note that writing of data to the nonvolatile memory 40 and reading of data stored in the nonvolatile memory 40 are controlled by the CPU 30.

Next, the data recording operation will be described with reference to the flowchart of FIG. First, in step ST1, a sector in which a read-modify-write operation is performed from the logical block address of the magneto-optical disk 10 on which data is recorded, that is, a state in which data holding a state before recording and data to be newly recorded are mixed. After reading the data of the sector, the contents are changed and the sector to be written again is determined. Further, the data of the determined sector is read from the magneto-optical disk 10, and the read data is stored in the buffer memory 29, and the process proceeds to step ST2. For example, when data is recorded in the logical block addresses “B1 to B13”, FIG.
3A, the physical sectors “PS0” and “P” for which the read-modify-write operation is performed from the magneto-optical disk 10 are performed.
The data of "S3" is read out and stored in the buffer memory 29 as shown in FIG. 4B.

In step ST2, as shown in FIG. 4C, data to be recorded is received from the computer, and the process proceeds to step ST3. In step ST3, data to be recorded on the magneto-optical disk 10 is selected again from the data read into the buffer memory 29, and copied to the nonvolatile memory 40 via the bus 35. When the magneto-optical disk 10 is mounted on the optical disk device 20, the disk-specific identification information MID recorded in the SFP zone of the magneto-optical disk 10 is read out and stored in the nonvolatile memory 40.

FIG. 5 shows the allocation of the nonvolatile memory 40. Here, when recording the data received from the computer device on the magneto-optical disk 10, there may be a case where a physical sector in which a read-modify-write operation is performed is generated on both the beginning and end of the received data. Therefore, the two data storage areas 40 are stored so that the data of each physical sector can be stored.
a and 40b are provided.

The data storage areas 40a and 40b are
The data portions 40a-1 and 40b-1 for storing data read from the magneto-optical disk 10 and written again on the magneto-optical disk 10 and the position on the magneto-optical disk 10 where the data was recorded are determined. Position information units 40a-2 and 40a for storing information to be enabled, for example, information such as a logical block address at the head of data and the number of logical blocks.
b-2.

The non-volatile memory 40 further includes disc-specific identification information such that the data stored in the data storage areas 40a and 40b can be determined as to what kind of data was recorded on the magneto-optical disk. A management area 40c for storing the MID is provided. Note that data stored in the management area 40c is valid so that it is possible to determine that incomplete data is stored because power supply is stopped during data writing to the nonvolatile memory 40. , And check data for verifying validity are also stored.

Here, for example, when the data shown in FIG. 4C is recorded on the magneto-optical disk 10, the data "d0", "B0", "B14" and "B15" of the logical block addresses "B0"
“D14” and “d15” are read from the magneto-optical disk 10 and written again. For this reason, as shown in FIG. 4E, it is indicated that the data of one logical block is stored in the position information section 40a-2 from the logical block address "B0", and the logical block is stored in the data section 40a-1. Data “d0” of the address “B0” is stored. Also,
The position information section 40b-2 has a logical block address "B1
It is indicated that data of "2" to "2" logical blocks are stored, and data "d14" of logical block addresses "B14" and "B15" are stored in the data section 40b-1.
“D15” is stored. In the management area 40c,
The identification information MID unique to the magneto-optical disk on which the data stored in the data storage area was recorded is stored.

In step ST4, recording data is generated from the data received from the computer device and the data stored in the buffer memory 29 and written to the magneto-optical disk 10 again. Record at 10. For example, as shown in FIG. 4D, data “e1 to e13” of the logical block address “B1 to B13” received from the computer device,
The data "d" of the logical block addresses "B0", "B14", and "B15" to be written to the magneto-optical disk 10 again
0 "," d14 ", and" d15 ", and the recording data is generated from physical sectors" PS0 "to" PS0 ".
3 ".

If the data recording is completed correctly in step ST4, the data and the position information of the data storage areas 40a and 40b stored in the nonvolatile memory are erased in step ST5, and the data recording operation is completed. The disc-specific identification information MID stored in the management area 40c of the nonvolatile memory 40 is deleted when the magneto-optical disc 10 is removed from the optical disc device 20. As a method of putting the data storage area into the erased state, for example, there is a method of writing a special value that does not exist as a logical block address into the position information units 40a-2 and 40b-2.

Next, a return operation in the case where the operation of the optical disk device 20 is interrupted during the data recording operation due to a power supply stop or a failure occurrence will be described with reference to a flowchart of FIG.

When the operation of the optical disk device 20 is restarted, in a step ST11, it is determined whether or not data is correctly stored in the data storage area of the nonvolatile memory 40. If the data is stored correctly, the process proceeds to step ST12, where it is determined whether the magneto-optical disk 10 is mounted. Here, the magneto-optical disk 1
0, the process proceeds to step ST13, where the disc-specific identification information M
The ID is read, and it is determined whether or not the ID matches the identification information stored in the management area of the nonvolatile memory 40. Here, when the identification information matches, the process proceeds to step ST14, and the position information sections 40a-2 and 40b of the nonvolatile memory 40
-Optical disk 10 indicated by the information stored in -2
The data stored in the data sections 40a-1 and 40b-1 is recorded at the upper position, and the process proceeds to step ST15.

If the data recording is completed correctly in step ST14, the data in the data storage areas 40a, 40b stored in the non-volatile memory is erased in step ST15, and the return operation is completed.

When the power to the optical disk device 20 is stopped, the magneto-optical disk 10 is removed from the optical disk device 20, and when the magneto-optical disk 10 is not mounted on the optical disk device 20, or when the optical disk device 20 is not mounted. If the magneto-optical disk is replaced during the period from the stop of the supply of power to the optical disk to the start of the return operation, step ST12 or step ST12 is performed.
The process proceeds from step 13 to step ST16.

In step ST16, the nonvolatile memory 4
Then, the computer is notified that the data stored in 0 cannot be recorded on the magneto-optical disk 10 and the processing is terminated. In step ST11, the nonvolatile memory 4
When no data is stored in 0 or when the stored data is not correct, the return operation ends.

As described above, according to the above-described embodiment,
Even if the data recording operation is interrupted, the data to be rewritten by the read-modify-write operation is stored in the non-volatile memory 40, so that it is possible to prevent the data temporarily erased from the magneto-optical disk from being lost. Further, when the data read from the buffer memory 29 is correctly written back, the data in the nonvolatile memory 40 is erased, so that the nonvolatile memory 40 can be used efficiently, and It is not necessary to use a nonvolatile memory having a large capacity. Further, the nonvolatile memory 40
The disk-specific identification information MID is also stored in the storage area. Only when the stored identification information MID matches the identification information MID of the magneto-optical disk 10, the stored data is written back to the magneto-optical disk 10. In addition, it is possible to prevent the stored data from being recorded on a different magneto-optical disk.

Further, if the data replaced with the data received from the computer is copied to the non-volatile memory 40, the data in the non-volatile memory 40 is written back at the start of the return operation, so that the state after the end of the data recording operation is obtained. It is also possible to do.

In the above embodiment, the case where data is recorded on the magneto-optical disk 10 has been described.
The optical disk is not limited to the magneto-optical type, but may be a phase change type optical disk or the like. Further, not only an optical disk but also a magnetic disk can be used as the disk-shaped recording medium.

[0047]

According to the present invention, data that is read from a disk-shaped recording medium and cannot be replaced by data to be recorded, and recording position information indicating a recording position of the data on the disk-shaped recording medium are included. Is stored in a non-volatile memory. Therefore, even if the recording operation of new data is interrupted in the middle, the data to be written back to the disk-shaped recording medium is stored in the non-volatile memory. Can be prevented from being lost.

Further, since the nonvolatile memory stores identification information unique to the disk-shaped recording medium, it is necessary to confirm that the identification information of the nonvolatile memory and the disk-shaped recording medium match before writing back the data. By doing so, it is possible to prevent data in the nonvolatile memory from being written back to another disk-shaped recording medium by mistake.

Further, when the data writing back to the disk-shaped recording medium is completed, the data stored in the nonvolatile memory is erased, so that the nonvolatile memory can be used efficiently.

When the identification information is different from the case where the identification information matches, a notification indicating that the data that has not been written back is stored in the nonvolatile memory is issued. Can be prevented from being accidentally lost.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of an area configuration of a magneto-optical disk.

FIG. 2 is a diagram showing a configuration of an optical disk device according to the present invention.

FIG. 3 is a flowchart showing a data recording operation.

FIG. 4 is a diagram for explaining a data recording operation.

FIG. 5 is a diagram showing allocation of a nonvolatile memory.

FIG. 6 is a diagram for explaining a return operation.

FIG. 7 is a diagram for explaining a data reproducing operation.

FIG. 8 is a diagram for explaining a conventional read modify write operation.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Magneto-optical disk, 20 ... Optical disk drive, 21 ... Spindle motor part, 22 ... Optical pickup part, 23 ... Read channel block, 24
... Servo control unit, 25 ... Signal processing unit, 26 ...
.Laser light output controller, 27 ... magnetic head, 28.
..Interface part, 29 ... buffer memory, 3
0: CPU, 35: bus, 40: nonvolatile memory

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D044 BC06 CC06 DE37 DE45 DE65 EF03 5D090 AA01 BB10 CC02 DD03 EE05 FF26 FF30 GG28

Claims (10)

[Claims] 1. When data is recorded on a disk-shaped recording medium in a logical unit, data recorded on the disk-shaped recording medium is read out in a physical unit larger than the logical unit, and the read-out is performed. In a data recording method in which a part of data is replaced with data to be recorded and then written back in the physical unit again, data read from the disk-shaped recording medium and not replaced with the data to be recorded, A data recording method, wherein recording position information indicating a recording position of the data on the disk-shaped recording medium is stored in a nonvolatile memory. 2. The data recording method according to claim 1, wherein the disc-shaped recording medium has unique identification information, and the non-volatile memory stores the identification information. 3. After a part of the read data is replaced with data to be recorded and when the process of writing back in the physical unit is completed again, the data stored in the nonvolatile memory and the data 3. The data recording method according to claim 2, wherein the recording position information is set in an erased state. 4. When the recording of data on the disk-shaped recording medium is interrupted and resumed, and when the identification information of the disk-shaped recording medium matches the identification information of the nonvolatile memory, the data is stored in the nonvolatile memory. 3. The data recording method according to claim 2, wherein the stored data is written back to a position on the disk-shaped recording medium indicated by the recording position information of the data. 5. When the recording of data on the disk-shaped recording medium is interrupted and resumed, when the identification information of the disk-shaped recording medium and the identification information of the non-volatile memory are different from each other, writing is performed. 3. The data recording method according to claim 2, further comprising outputting a notification indicating that data not returned is stored in the nonvolatile memory. 6. A recording / reproducing means for recording / reproducing data on / from a disk-shaped recording medium; a nonvolatile memory for storing data read from the disk-shaped recording medium; a recording / reproducing means; Control means for controlling the operation of the memory, wherein the control means controls the recording / reproducing means to record data on the disc-shaped recording medium when recording data in logical units on the disc-shaped recording medium. The read data is read for each physical unit larger than the logical unit, and a part of the read data is replaced with data to be recorded and then written back for each physical unit. Controlling the data read from the disk-shaped recording medium and not replaced by the data to be recorded; and the disk-shaped recording of the data. A disk device for storing recording position information indicating a recording position on a medium. 7. The disc-shaped recording medium has unique identification information. The control means controls the recording / reproducing means to read out the identification information from the disc-shaped recording medium, 7. The disk device according to claim 6, wherein the read identification information is stored by controlling the disk drive. 8. The control means controls the non-volatile memory after replacing a part of the read data with data to be recorded and then completing the process of writing back in the physical unit again. 8. The disk device according to claim 7, wherein the data stored in the nonvolatile memory and the recording position information of the data are in an erased state. 9. The non-volatile memory according to claim 6, wherein the control unit restarts the recording process of the interrupted data, and when the identification information of the disk-shaped recording medium and the identification information of the non-volatile memory match, 8. The method according to claim 7, further comprising: controlling a reproducing unit to write back the data stored in the nonvolatile memory to a position on the disk-shaped recording medium indicated by the recording position information of the data. Disk device. 10. The control means, when resuming the recording process of the interrupted data, if the identification information of the disk-shaped recording medium and the identification information of the non-volatile memory are different from each other, write back. 8. The disk device according to claim 7, wherein a notice is output indicating that no data is stored in the nonvolatile memory.