JPS628218A - Alternation processing method - Google Patents

Abstract

PURPOSE:To perform an alternation processing which is easy, high in reliability, and short in processing time by writing the alternate sector information of a corresponding track together in a specific fixed sector on multiple black basis, and confirming whether there is the alternate sector information in the sector firstly and performing the processing when data is written or read. CONSTITUTION:Sectors S(0)-S(n) are each formed of a sector mark area SM, a sector address area SA, a data area DT, and a gap G from the head and all pieces of alternate sector position information CDT on data areas DT in the corresponding track are written together in the data area DT of some fixed sector S(i) on multiple block basis instead of user data. When data is written in or read out of sectors on the track, said alternate sector information written in the fixed sector S(i) on multiple block basis is read out firstly to attain access. The sector information is in the multiwritten state, so the reliability is high.

Description

[Detailed Description of the Invention] [Summary] This is a replacement processing method in which replacement sector information of a corresponding track is written in multiple blocks at once in a predetermined fixed sector, and when writing/reading data, the replacement sector information is first written in the sector. By checking the presence or absence and processing, data processing becomes simple and reliable, and can be processed in a short time.

[Industrial application field]

The present invention relates to a replacement processing method for collectively writing replacement sector information of a corresponding track in multiple blocks in a predetermined fixed sector among a plurality of sectors into which a track is divided.

For example, rewritable optical disk devices, which have recently been extensively developed for practical use, require processing methods that are different from those of conventional magnetic disk devices. Processing is complex and takes a long time.

As a replacement processing method for such devices, there is a need for the development of a replacement processing method that is simple, highly reliable, and capable of processing in a short time.

[Prior Art and Problems to be Solved by the Invention] FIG. 4 shows a data format diagram explaining the conventional replacement processing situation, and FIG. 5 shows a block diagram explaining the conventional replacement processing situation.

FIG. 5 shows a part of a reading system functional block 1 and a part of a writing system functional block 3 of a re-writable optical disc device. Note that this optical disk device is equipped with the above-mentioned functional block 19.
In addition to the functional block 3, it is assumed that a microprocessor 4 (hereinafter referred to as MPU 4) that controls the operation of each of these functional locks 1 and 3 is provided.

The reading system functional block 1 includes a sector mark detection circuit 11 that detects a sector mark needle from a read signal ■ (read signal ■) and outputs a sector pulse ■, and a sector mark detection circuit 11 that detects a recorded sector or an unrecorded sector and outputs a detection signal. ■
A recording/non-recording detection circuit 12 that sends out a read signal ■
A waveform shaping circuit 13 that shapes the waveform of the signal and outputs a read pulse ■, an in-sector bit counter 14 that creates a recording/non-recording detection window ■ from the sector pulse ■, and a read clock ■ or NRZ data ■ (from the read pulse ■). For example, a VFO 15 that creates data (defined as "1" when the magnetization direction is reversed and "0" when it is not reversed), a data conversion circuit 16 that converts NRZ data, etc. into parallel data, Sync-by from the output of circuit 16) SB (fourth
The SB detection circuit 17 detects the SB (recorded at the beginning of the intra-sector data area DT shown in the figure) and the read clock ■
and the SB detection signal of the SB detection circuit 17, and a write pulse creation circuit 18 that creates and outputs a write pulse ■ from the SB detection signal of the SB detection circuit 17, and a data buffer 19 that stores data to be transferred from the data conversion circuit 16 to a host device (not shown). and a replacement sector information buffer 20 that stores replacement sector information.
', recording/non-recording detection window ■, and recording/non-recording detection circuit 1
An AND circuit 21 that takes an AND condition with the detection signal ■ output from 2, F, F22 that latches the output of the AND circuit 21, and MP
The inverter 23 sends out the signal sent from U4 as an enable signal for the data buffer 19.

The write system functional block 3 also includes an alternate sector information buffer 31' that stores alternate sector information sent from the MPU 4, and a data buffer 32 that stores data transferred from a host device (not shown). , a write circuit 33 for writing replacement sector information and data transferred from a host device (not shown) onto track a.

This example will be described on the assumption that there is some kind of defect in the data area DT of sector 5(j). That is, when a defective sector 5(j) is detected, the MPU 4 writes replacement sector information to the replacement sector information buffer 31' to the write circuit 3.
3 to the data area DT of sector 5(j).

Next, in the above state, if there is a write command to transfer data to the same sector 5(j) from a higher-level device (not shown),
First, the sector 5 (j) is read, and the read signal (2) is shaped by the waveform shaping circuit 13 and sent to the VFO 15 as a read pulse (2).

The VFO 15 generates a read clock ■ and NRZ data ■ from the read pulse ■, converts them into parallel data, and sends them to the SB detection circuit 17. It is sent to the data buffer 19 and the alternate sector and sector information buffer 20'.

Furthermore, while detecting the read gate [phase]°, the SR detection circuit 17 detects the sync byte (
When the SB) is detected, the SB detection signal is sent to the write pulse generation circuit 18, and the write pulse generation circuit 18 thereafter uses a write clock ■ as a write pulse ■ once every eight times to the data buffer 19 and alternate sector information buffer. Send on 20th.

At this point, the MPU 4 has sent out an enable signal which is a data storage permission signal to the alternate sector information buffer 20'. On the other hand, the data buffer 19 is in a state where data storage is not permitted by the inverter 23.

Based on the contents of the alternate sector information buffer 20', the MPU 4 writes the transfer data from the host device (not shown) stored in the data buffer 32 of the write system block 3 to the alternate sector.

In addition, even in the case of general data writing, the sector S (
Reading is performed sequentially starting from 0). That is, the read signal ■ is detected by the sector mark detection circuit 11. The signal is sent to the recording/unrecording detection circuit 12 and the waveform shaping circuit 13, and the sector mark detection circuit 11 generates a sector pulse every time it detects a sector mark needle.
is sent out and counted by the intra-sector bit counter 14.

In addition, the recorded/unrecorded detection circuit 12 detects each sector S (0) to
The recording/unrecording state of data with respect to S (n) is detected, and the detection signal (■) is sent to one input terminal of the AND circuit 21.

Furthermore, the recording/non-recording detection window (2) from the intra-sector bit counter 14 is input to the other input terminal, and the result of taking the AND condition is latched into F and F22. This content is sent to the MPU 4 as a recording section detection signal (2).

On the other hand, the MPt 14 confirms the detection of the unrecorded sector S (m) by the recording unit detection signal (2), and writes the data transferred from the host device (not shown) to the unrecorded sector S (m).

Next, when reading, the data is read sequentially from sector 5(0) as described above, and the data at that time is stored in the data buffer 19. At this time, the enable signal from the MPU 4 is being sent to the data buffer 19 to permit storage.

When the unrecorded sector S (m) is confirmed, the read operation ends. Also, if replacement sector information has been written to sector 5(j), the replacement sector information is stored in the replacement sector information buffer 20', and the read target range is newly replaced under the control of the MPU 4. Read sector.

Note that the MPU 4 determines whether to read the alternate sector during this series of read operations or after the series of read operations is completed.

As described above, sectors in which alternate sector information is recorded are detected during unrecorded sector detection during write operations or during a series of read operations during read operations, so processing for alternate sectors is complicated. In addition, there is a problem that the processing requires a long time.

[Means for solving problems]

FIG. 1 shows a detailed illustration of the invention. The principle diagram shown in FIG. 1 shows the principle diagram of the data format on track a. Track a is divided into a plurality of sectors 5(0) to S(n), and these sectors 5(0) to S(n) Starting from the beginning, there is a sector mark area needle, a sector address area SA indicating the physical position of sectors S (0) to S (n), a data area DT for recording user data, and a gap provided between each area. Fixed sector 5(i) in sectors 5(0) to 5(n)
The data area DT is configured as an area where all alternate sector position information for the data area DT in the track is written in multiple blocks instead of user data.

It is assumed that the sync byte SB is recorded at the beginning of the data area DT.

[Effect]

When writing and reading data to sectors S (0) to S (n) on I rank a, first read the alternate sector information written in multiple blocks in fixed sector 5 (i), and then write and read data. Since the data reading operation is performed, the processing is easy, the processing operation is highly reliable, and the processing can be performed in a short time.

〔Example〕

The gist of the present invention will be specifically explained below with reference to embodiments shown in FIGS. 2 and 3.

FIG. 2 shows a control operation diagram of a data format according to an embodiment of the present invention, and FIG. 3 shows a block diagram of an embodiment of the present invention. Note that the same reference numerals indicate the same objects throughout the figures.

The present embodiment shown in FIG. 2 shows an embodiment in which the first sector 5(0) is fixed as the sector in which replacement sector information of all sectors 5(1) to S(n) of the main trunk a is recorded. In addition, when reading sector 5 (0), the read gate signal [phase] is sent to the bit counter 14 in the sector in the read optical function block l.
It is assumed that a gate circuit that sends out is built in.

Therefore, when the SR detection circuit 17 detects sync-by l-5R while detecting the read gate signal 0, it sends the SB detection signal to the write pulse generation circuit 18, and the write pulse generation circuit 18 generates the subsequent read clock ■8 times. It is sent as a write pulse ■ once every time, and this light pulse ■ and the MPU
4, the alternate sector information recorded in sector 5(0) is transferred to the alternate sector information buffer 2.
Store at 0.

Since this replacement sector information is made up of multiple blocks, it is good if even one of them can be read normally, so it is highly reliable.

Incidentally, the processing situation at this time is shown in FIG.

During write control, MPU 4 provides alternate sector information bar 2.
Data transferred from a higher-level device (not shown) is written to the alternate sector specified by the contents of 0.

When all data writing is completed and it becomes necessary to update the alternate sector information, the updated alternate sector information is written in multiple blocks to sector 5(0), and the processing for the write command is completed.

On the other hand, during the data read process, the MPt 14 determines in advance whether to directly read the sector in the read target range or read the alternate sector based on the contents of the alternate sector information buffer 20, and the data read process is controlled.

〔Effect of the invention〕

According to the present invention as described above, the processing operation for reading/writing data in multiple sectors on a re-writable optical disk medium is easy, the processing operation is highly reliable, and can be processed in a short time. effective.

[Brief explanation of drawings]

Fig. 1 is a detailed diagram explaining the present invention, Fig. 2 is a data format control operation diagram according to an embodiment of the present invention, Fig. 3 is a block diagram of an embodiment of the present invention, and Fig. 4 is a diagram illustrating the conventional method. FIG. 5 is a data format diagram illustrating a replacement processing situation, and FIG. 5 is a block diagram explaining a conventional replacement processing situation. In the figure, l is a reading system functional block, 3 is a writing system functional block, and 4 is an MPU. 11 is a sector mark detection circuit, 12 is a recording/non-recording detection circuit, 13 is a waveform shaping circuit, 14 is an in-sector bit counter, 15 is a VFOl, 16 is a data conversion circuit, 1
7 is an SB detection circuit, 18 is a write pulse generation circuit, 19.32 is a data buffer, 20.20' and 31.31' are alternate sector information buffers, 21 is an AND circuit, and 22 is an FF. 23 represents an inverter, and 33 represents a write circuit. I'll explain the whole thing, Figure 1, Figure 2, Figure 2. [Next J1'C? ? ! &3XJ'E8f5 Cheetah, t-7・v)5%4 Fig.

Claims (1)

[Claims] A track (a) on a recording medium is divided into a plurality of sectors (S(0)
In a recordable/reproducible storage device divided by ~S(n)), all alternate sector position information in the track (a) is multiplexed into a predetermined sector (S(i)) in the track (a). When a write command is executed, the sector (S(i)) is read, data is recorded in a normal sector in the write target range according to the position information of the alternate sector that was normally read during multiple block writing, and data is recorded in the sector (S(i)). Data is recorded in the alternate sector specified by S(i)), and when a read command is issued, the sector (S(i)) is read and the read target is determined according to the position information of the alternate sector that was successfully read during multiple block writing. Data is read in the normal sector within the range and data is read in the alternate sector specified by the sector (S(i)), and if the alternate sector position information is updated when the write command is executed, the ), the updated replacement sector position information is re-recorded in multiple blocks.