JPH0520789A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To efficiently perform a record protecting process by rewriting data with the data transferred from a host system when an external disturbance is detected during a recording and a data error is generated through a required check. CONSTITUTION:When an external disturbance detecting means 16 detects an external disturbance while recording the data which are stored in a memory 7, the corresponding sector CRC or ECC check is performed. And if data are generated, the error data of the corresponding sector are rewritten by the data transferred from a host system 10 by a reproduction request signal or the accumulated data of the memory 7, a good record protecting process is performed according to the disturbance and a highly reliable recording without a reproduction error is conducted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for writing / reading data by using a magnetic head, an optical pickup or the like.

[0002]

2. Description of the Related Art A recording / reproducing apparatus of this kind has been conventionally used as an external storage device of a computer or a word processor. In this type of recording / reproducing apparatus, since data protection operation due to disturbance is not performed when writing data, data in the storage device may be destroyed. Further, there is a problem to be solved that the reliability of the data is not so high because the data is not written again even when a reproduction error occurs in the verify operation.

[0003]

As described above, since the recording / reproducing apparatus does not perform the recording protection process even when it receives an external disturbance, the recorded data may cause a reproduction error. . The present invention has been made in view of such a technical problem, and an object of the present invention is to prevent a reproduction error by performing a recording protection process according to a disturbance or the like, and to improve the reliability of data recording. It is an object of the present invention to provide a recording / reproducing device capable of improving the above.

[0004]

In the recording / reproducing apparatus of the present invention, when the disturbance detecting means detects a disturbance at the time of recording, at least the sector which is being recorded at that time is re-recorded, thereby achieving the above object. Is achieved. In another recording / reproducing apparatus of the present invention, when the disturbance is detected by the disturbance detecting means at the time of recording, at least the sector that was being recorded at that time is checked for CRC or ECC, and the data read at the time of CRC or ECC check is read. The above-described object is achieved by utilizing the configuration in which the sector which is being recorded at least when the disturbance is detected is rewritten.

Still another object of the present invention is to achieve the above object by re-recording at least the track being recorded at the time when the disturbance detecting means detects the disturbance at the time of recording. To do.
Further, according to still another recording / reproducing apparatus of the present invention, when the disturbance is detected by the disturbance detecting means at the time of recording, at least the CRC or ECC of the track being recorded at that time.
The above object is achieved by using the data read at the time of performing the check and the CRC or ECC check and rewriting the track being recorded at least at the time of detecting the disturbance. According to still another recording / reproducing apparatus of the present invention, when the disturbance is detected by the disturbance detecting means at the time of recording, the host system is requested to retransfer the data and the retransferred data is recorded. It achieves the purpose.

[0006]

According to the above-described recording / reproducing apparatus of the present invention, since a data recording protection operation is added when a disturbance occurs during data recording, it is possible to perform highly reliable data recording processing.

[0007]

1 is a block diagram showing the configuration of an embodiment of a recording / reproducing apparatus to which the present invention is applied. In the recording / reproducing apparatus of FIG. 1, for example, in order to perform high density recording,
A sector servo system is used in which a predetermined number of servo sectors are provided on the data surface of the disk device 1 as a medium, and the servo sectors are detected to perform servo control of the magnetic head (or pickup) 2. In FIG.
Data signals and servo signals are reproduced from a rotating medium (disk device) 1 using a head (magnetic head) 2. The reproduced signal is amplified by the read amplifier 3, and the signal demodulated by the pulse detector 4 is input to the microcomputer 6 through the I / O buffer 5.

The microcomputer 6 is a RAM
And a memory consisting of a ROM. Also,
This microcomputer 6 has an interface controller 8 and an external interface 9,
It is connected to the host system 10 (FIG. 2). Further, the microcomputer 6 is connected to the I / O buffer 5 and the interface controller 8 via a disk controller 11.

The microcomputer 6 generates head position control (VCM drive) data based on the reproduction signal (servo signal) from the head 2. The data for driving this VCM is the I / O buffer 5 and VCM.
It is supplied to the VCM 13 through the amplifier 12, and the VCM 1
The seek operation of the head 2 is servo-controlled by driving 3.

On the other hand, the recording data transferred from the host system 10 or the like is supplied to the head 2 through the I / O buffer 5 and the write amplifier 14, and the head 2 uses the recording data to write the data surface of the medium 1 ( Recording (writing) to the data sector).

FIG. 2 is a flow chart showing a processing procedure of a recording operation in an embodiment of the recording / reproducing apparatus to which the present invention is applied. The flowchart of FIG. 2 shows an example of a processing procedure when a data recording request is issued from the host system (computer, word processor, etc.) 10 to the recording / reproducing apparatus, and a write (recording) as described below is performed. Processing operation and disturbance detection processing are performed.

In the write operation process shown in FIG. 2, when a recording request (command data) and recording data for one block (for example, 8 sectors) are sent from the host system 10 to the recording / reproducing apparatus ( Step S1
And step S2), these data are transferred to the memory 7 of the recording / reproducing apparatus. The recording / reproducing apparatus controls the drive 15 composed of FDD, HDD, MO or the like based on the data stored in the memory 7,
The medium 1 and the head 2 are driven to record one sector or one track (step S3). In step S4, it is determined whether or not the recording of the data stored in the memory 7 is completed, and if not, the recording is performed while updating the recording position and the data in step S5. This recording is performed as an operation of recording the one block of data stored in the memory 7 from the first sector to the final sector (for example, the eighth sector). Also, the above 1
When the recording command and the recording data for the next block are sent after the recording for the block is completed, the above procedure is repeated again and the recording for the next block is performed.

Therefore, the disturbance detecting means 1 is provided in the recording / reproducing apparatus.
6 is provided, and the disturbance detection process in FIG. 2 is performed when a disturbance detection signal is received from the disturbance detection means 16 during the write (recording) operation. In FIG. 2, when a disturbance occurrence signal is received from the disturbance detecting means 16, it is determined in step S6 whether or not the recording operation is being performed. If the recording operation is being performed, the drive 15 is used to perform recording in step S7. Data check processing is performed. Next, in step S8, it is determined whether or not there is an error in the recorded data. If there is no error, step S during the write processing.
Returning to step 4, it is judged whether or not the data has ended. If not, the process proceeds to step S5 and the above-mentioned write (record) is performed.
Continue the operation procedure. If the data has ended, the write operation is ended.

On the other hand, if it is determined in step S8 that there is an error in the recording data, step S9
The recording area of the data in which the error has occurred and the data are confirmed and the step S during the write operation is performed.
Returning to step 3, the data of the sector or track where the data error occurred is recorded (written) again.

Specifically, if a disturbance occurs during recording of the third sector, for example, during recording of the above-mentioned recording, and a signal for disturbance generation comes from the disturbance detecting means 16, at least recording is performed. A CRC or ECC check is performed on the data of the third sector, and if a data error has occurred, data is re-recorded using the data of the sector stored in the memory 7 in the recording / reproducing apparatus.

FIG. 3 is a flowchart showing the processing procedure of another embodiment of the recording / reproducing apparatus to which the present invention is applied. It should be noted that each component and each step in FIG. 3 is also assigned the same reference numeral as each reference symbol in FIG. 2 to indicate substantially the same component and operation. In the embodiment of FIG. 3, a host system (personal computer or the like) 1
When a recording request for data of 0 block to 1 block (for example, 8 sectors) is received, the data of 1 block is transferred to the memory 7 of the recording / reproducing apparatus and sequentially recorded from the first sector. For example, when the disturbance is generated and the disturbance detection signal is received from the disturbance detecting means 16 while recording the data of the third sector, in step S10, the drive 1
The recording data of the third sector is read using the memory 5 and the memory 7, and the data of the sector read from the memory 7 is recorded again in step S11.

In the embodiment of FIG. 3, the disturbance detecting means 16
When the occurrence of the disturbance is detected in step S2, the recording is performed again regardless of the presence or absence of the data error, so that the check process of the recording data in step S7 in FIG. 2 may not be performed. But 3
A CRC or ECC check similar to step S7 in FIG. 2 is performed on the data of the sector, and even if no data error occurs in this check, just in case,
A procedure of reading the data of the sector from the memory 7 in the device and re-recording the read data of the sector may be adopted.

FIG. 4 is a flowchart showing a processing procedure of still another embodiment of the recording / reproducing apparatus to which the present invention is applied. It is to be noted that each component and each step in FIG. 4 having the same reference numerals as those in FIG. 2 respectively indicate substantially the same component and operation. In the embodiment of FIG. 4, when the host system (personal computer or the like) 10 requests recording of one block (for example, 8 sectors) of data, this one block of data is transferred to the memory 7 of the recording / reproducing apparatus. Then, the data is sequentially recorded from the first sector. For example, when a disturbance occurs and a disturbance occurrence signal is received from the disturbance detecting means 16 while recording the data of the third sector, in step S12, the data of the same block is retransmitted to the host system 10. The request is made, the write operation is terminated, and the transferred data of the block is recorded again from the beginning.

In the embodiment of FIG. 4, the disturbance detecting means 16
When the occurrence of the disturbance is detected in step S2, the recording is performed again regardless of the presence or absence of the data error, so that the check process of the recording data in step S7 in FIG. 2 may not be performed. But 3
A CRC or ECC check similar to step S7 in FIG. 2 is performed on the data of the sector, and even if no data error occurs in this check, just in case,
A procedure of re-recording the data of the block re-transferred from the host system 10 from the beginning may be adopted.

In each of the above embodiments, the case where one block of data is transferred from the host system 10 and a disturbance occurs during the recording has been described as an example. However, the present invention is not limited to this. The same operation can be performed in the case where the data for one track is transferred from the recording medium and the disturbance occurs during the recording. That is, when a request for recording data for one track is received from the host system (computer, word processor, etc.), the data for one track is transferred to the memory 7 of the recording / reproducing apparatus and sequentially recorded from the first sector. Therefore, for example, when a disturbance is generated and a disturbance generation signal is received from the disturbance detection means 16 while recording the data of the third sector, the following processing is performed corresponding to each of the above-described embodiments. Do.

That is, in accordance with the embodiment of FIG. 2, CRC or ECC check is performed on the recorded data of the track having the third sector, and when a data error occurs, the data is stored in the memory 7 in the apparatus. Re-record the data of the track in question. Further, corresponding to the embodiment of FIG. 3, the recorded data of the track having the third sector is read and the data of the track is recorded again. In this case, as in the case of FIG. 3, it is not necessary to check the presence or absence of an error in the print data, but if necessary, the print data check process corresponding to step S7 in FIG. 2 is performed. Even if a data error does not occur in this check, just in case, a procedure of reading the data of the track from the memory 7 in the apparatus and re-recording the data of the sector of the track may be taken. . Further, corresponding to the embodiment of FIG. 4, the host system 10 is requested to retransfer the data of the same track, the write operation is ended, and the transferred data of the track is rerecorded from the beginning. Note that in this case as well, FIG.
It is not necessary to check the presence / absence of an error in the recording data as in the case of step S1, but if necessary, step S7 in FIG.
Even if a data error has not occurred in this check, the host system 10 is requested to retransfer the data of the same track, and the write operation is terminated, just in case. Alternatively, the procedure of re-recording the transferred data of the track from the beginning may be adopted.

[0022]

As apparent from the above description, according to the recording / reproducing apparatus of the present invention, when the disturbance is detected by the disturbance detecting means at the time of recording, at least the sector which is being recorded at that time is re-recorded. Therefore, it is possible to provide a recording / reproducing apparatus capable of preventing the reproduction error by performing the recording protection process according to the disturbance and improving the reliability of the data recording.

According to another recording / reproducing apparatus of the present invention, when the disturbance is detected by the disturbance detecting means at the time of recording, at least the CRC or ECC of the sector which is being recorded at that time is checked and the CRC or ECC is checked. The sector that was being recorded at least when the disturbance was detected was rewritten using the data that was read at that time, or when the disturbance was detected by the disturbance detection means during recording, it was being recorded at least at that point. If the disturbance is detected by the disturbance detection means at the time of recording the track again or at the time of recording, at least the CRC or ECC check of the track being recorded at that time is performed, and the data read when the CRC or ECC check is used And was recording at least when the disturbance was detected. The rack is configured to be rewritten, or when disturbance is detected by the disturbance detection means during recording, the host system is requested to retransmit the data and the retransmitted data is recorded. There is provided a recording / reproducing apparatus capable of preventing a reproduction error by performing a recording protection process according to the above and improving the reliability of data recording.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a recording / reproducing apparatus to which the present invention is applied.

FIG. 2 is a flowchart showing a processing procedure of a recording operation in an embodiment of a recording / reproducing apparatus to which the present invention is applied.

FIG. 3 is a flowchart showing a processing procedure of another embodiment of the recording / reproducing apparatus to which the present invention is applied.

FIG. 4 is a flowchart showing a processing procedure of still another embodiment of the recording / reproducing apparatus to which the present invention is applied.

[Explanation of symbols]

1 media (disk device) 2 heads 4 pulse detector 6 microcomputer 7 memory 10 Host system 15 drive 16 Disturbance detection means

Claims (7)

[Claims] 1. A recording / reproducing apparatus characterized in that, when a disturbance is detected by a disturbance detecting means at the time of recording, at least the sector being recorded at that time is re-recorded. 2. A recording / reproducing apparatus, characterized in that, when a disturbance is detected by the disturbance detecting means at the time of recording, at least the sector which was being recorded at that time is checked by CRC or ECC. 3. The recording / reproducing apparatus according to claim 2, wherein the sector that was being recorded at least when the disturbance was detected is rewritten by using the data read when the CRC or ECC check is performed. 4. A recording / reproducing apparatus, wherein when a disturbance is detected by the disturbance detecting means during recording, at least the track being recorded at that time is re-recorded. 5. A recording / reproducing apparatus, characterized in that, when a disturbance is detected by a disturbance detecting means at the time of recording, at least the track being recorded at that time is subjected to CRC or ECC check. 6. The recording / reproducing apparatus according to claim 5, wherein the data read at the time of the CRC or ECC check is used to rewrite at least the track which was being recorded at the time when the disturbance was detected. 7. A recording / reproducing apparatus, wherein when a disturbance is detected by the disturbance detecting means during recording, the host system is requested to retransfer the data and the retransferred data is recorded.