JPS59109963A - System for controlling writing of information - Google Patents

Abstract

PURPOSE:To effectively perform writing of information even when an error is detected, by discriminating written parts from unwritten parts by means of an information storage device and continuously writing unwritten information after a previously interrupted part in the interrupted part. CONSTITUTION:A microprocessing device 107 reads out a microprogram from a control memory 108 and instructs a data buffer circuit 105 to receive data. Then starting of reading operation from a leading sector No. indicated by a parameter is instructed to a read/write circuit 106 by the microporgram. Then the circuit 106 starts the reading operation and discriminates whether eadh sector is unwritten or already written for every sector. When an unwritten sector is detected and indicated to the device 107 in the course of this operation, the microprogram indicates the position of writing data corresponding to the forefront of the unwritten sector in the circuit 105 to the circuit 105.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] 13 The present invention relates to write control in an information storage device of an information processing system, and particularly relates to a control method suitable for rewriting after writing is interrupted.

[Prior art]

An information storage device in a conventional information processing system.

To rewrite data after interrupting writing, the information storage/storage device transfers the interrupted data block number and error information to the upper information processing device, and then transfers the information to the information processing device that received the information and the data block number and error information. The instructions to be rewritten are reconfigured by the processing of the handheld overrating system, and the information storage device receives the reconfigured instructions. There was a drawback that the reconfiguration process of Nodame's instructions was complicated. Rewritten again.

Interrupted reading in information storage devices that are not available.

The written information remains on the medium in its original state, and it is necessary to rewrite it in a new area, which complicates the process of reissuing instructions even in the process of changing the rewriting position.

[Object of the Invention] 1. The object of the present invention is to provide an information processing device for continuously writing information after the writing of information is interrupted without rewriting the reading/writing portion. An object of the present invention is to provide a method for simplifying control between information storage devices.

[Summary of the invention]

An error that occurs while writing information, such as when the power is turned off.
After writing is interrupted, the information processing device reissues almost the same command as when writing was started, so the information storage device detects the position where rewriting should start,
It is characterized by continuing the previously interrupted writing from that position.

[Embodiments of the invention]

An embodiment of the present invention has been described above. FIG. 1 shows an information storage device and an information processing device that constitute this embodiment.

Indicates the connection status with. In FIG. 1, information to be recorded in the information storage device is transferred from the information processing device to the information storage device. The information storage device has a recording medium, and the recording format thereof is shown in FIG. The recording format of the recording medium according to this embodiment consists of a plurality of tracks, and the tracks are divided into a plurality of sectors. A fixed back count can be written to this sector. Therefore, information is recorded sector by sector. Trunks are numbered from O to X, and sectors still within the same track number are numbered from O to y. Information for this.

The processing unit attempts to write the information prior to transferring it.

The target track number and sector number are transferred and the positioning, called a "sea key", instructs the information storage device to perform the operation.

do. After the seek operation is completed, the information processing device (the information processing device) starts transferring write data to the information storage device. Therefore, to write information, the information processing device d transfers commands, parameters, and write data as shown in FIG. Ma.

The information storage device also provides status information indicating whether the write operation of this information has been successfully completed.

information processing device.

The above-mentioned parameters are shown in FIG. 4 α and b.

In addition to the top track number, sector number, and number of sectors in which writing is to be performed, there is also flag information indicating whether it is a first-hit write operation or a rewrite operation. When this rewrite flag is 0, that is, the state shown in Figure 4 a, it indicates an initial write operation, and when the rewrite flag is ``1'', that is, the state shown in Figure 4, it is a rewrite operation. 3. It shows that it is an action. This initial writing or rewriting operation is instructed by the information processing device. The initial write operation is no different from the conventional write operation.

There is no roller. In the present invention, this lag is provided in order to prevent the processing speed of the entire information processing system from decreasing as much as possible.

First, as shown in FIG. 5 α, the initial writing finger.

Displays N sectors from N sectors of any track.

An attempt was made to write to n, but for some reason n
It is assumed that the r write operation ends when the writing of the +4 sector is completed, and therefore the writing from the n+5 sector to the N sector is not executed. In this situation, the information processing device uses exactly the same command as the first initial write, except that the rewrite flag is set to 1, as shown in Figure 4b.
Prepare the parameters, 3 meters, and write data and write the information again.

information storage device. Information storage is this re.

Rewrite operation based on transferred parameter information.

When it decodes that it is an instruction, it first performs a seek operation to position the read/write, 1, 4, and write head to the position of the specified track number and sector number. Data is rewritten when the seek operation is completed.

to find the desired position, i.e. the sector number.

A read operation is executed for each sector sequentially starting from the data of the first sector number. As a result of a read operation, the information storage device only determines the state of each sector read, ie, whether data has been written.

To determine whether data has been written, ``For example, if the device uses a magnetic recording method, count the reversal of magnetic flux (: number), or if the device uses an optical recording method, count the number of holes, and if the reversal of the magnetic flux exceeds a certain threshold. For each sector read in this way, as shown in FIG. In this case, since the information storage device according to this embodiment uses a rotating recording medium, it waits until the n+5th sector appears next and resumes writing from the n+5th sector.By the way, the n+4th q from the first sector.

Since the data up to the sector has already been written, in the rewrite operation according to the present invention, the data transferred from the information processing device W includes data from the first sector to the n+4th sector. The storage device uses the above-mentioned written/unwritten determination result to write n+ sectors from the first sector.
4th c.

It receives the data on the lid but controls it so as not to write or read it to the recording medium, and is the n+5th one.

After that, control is performed to write data to the recording medium. 1. Configuration of an information recording device to which the present invention is applied.

The operation will be explained with reference to FIGS. 6 and 7. .

The information processing device 101 issues a rewrite instruction.

Then, the information recording device 102 interfaces with it.

through circuit 104 and microprocessor 10;
Decipher by 7.

Upon learning the commands and parameters shown in FIGS. 6 and 4 through this decoding, the microprocessor 107 reads the microprogram from the control memory 108, and the microprogram instructs the buffer circuit 105 to receive the data. This instruction is given to the access circuit 109 using parameters.

Positioning of the designated head track number of the recording medium 103 is performed the first time by driving the access mechanism 110.

The access circuit 109 indicates that the positioning has been completed.

Microprocessor 107 indicates the microprocessor.

The program then uses the read/write circuit 106 to start a read operation from the first segment number specified by the parameter.
Instruct to. Receiving this instruction--Do/Write circuit 1
06 starts reading and determines whether each segment is unwritten or written. In this operation, since writing is interrupted first, a written sector is detected at first, but in the middle of the process, a red written sector is detected. Unwritten sector.

When the microprogram detects this and indicates it to the microprocessor 107, the microprogram transfers the write data corresponding to the beginning of the unwritten sector to the data buffer block 105 in the data buffer circuit 105.

・ 7 ・ Indicates the position. The write data is stored in the data buffer circuit 105 in the order of reception, and is stored for one track at most.

Therefore, the data corresponding to the written sector in the data buffer circuit 105 is not instructed to be written to the data buffer circuit.

105. The data bag 7 circuit 105 is not necessarily required for rewriting.

If the data buffer circuit 105 does not have a data buffer circuit 105, it detects the beginning of an unwritten sector, and only receives write data from the information processing device 101 at the ridge and receives data corresponding to a written sector. The 0 transfer to the read/write circuit 106 is suppressed and only unwritten data is read.

A method of transferring the data to the read/write circuit 106 is also possible.

Ru. Thereafter, writing of unwritten data to the recording medium 106 is instructed one after another, and writing of all data is completed.

This is achieved by performing the write control as described above.

2. Make use of the read-in data that was once interrupted. .

°　8゛ Especially if you write once, you can rewrite in the same place.

Effective for destructive recording media that cannot be damaged.

It is possible to provide various writing methods. It is also issued by the information processing device to instruct rewriting.

A series of instructions can perform initial writing or rewriting without having to be particularly aware of the sector location where it was initially interrupted.

This can be simplified by simply changing the parameter that indicates .

〔Effect of the invention〕

According to the present invention, after interrupting writing to a recording medium, 11 rewriting can be continued on the part where it was previously interrupted.At the same time, the rewriting instruction can be almost the same as the writing instruction at the time of interruption, so the recording can be performed. It is possible to simplify the existence/dynamics of the medium and the rewriting process. .

Furthermore, the writing quality is similar to that of optical disk media.

Normally when writing on a bad recording medium.

To ensure quality, read after writing.

However, according to the present invention, a control method such as a control method is used.

If a control method is added, the information storage device can be reused.

Information ξ written before the interruption after writing is completed.

The information that was continuously written after the interruption is read out continuously, the information is checked, and as a result of this read check,
It is possible to perform processing such as reserving a spare area for each error-prone information. That is, in the rewriting process according to the present invention, since the information before the writing was interrupted is also retransferred, even if an error is detected in the read check after the writing is performed, the replacement area can be easily transferred. It becomes possible to record the error information therein without intervening the control of the information processing device.

Furthermore, according to this control method, if the cause of write interruption is an information storage device, for example, the above-mentioned control can be performed even if the recording medium on which writing was interrupted is transferred to another normal information storage device. It also has the effect of

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the connection between an information processing device and an information storage device, FIG. 2 is a diagram showing a recording format of a recording medium, and FIG. 3 is a diagram showing the information processing device and information storage. Figure 4 α, b is a detailed diagram of 4-layer information; Figure 5 α, b is a diagram showing the procedure for sending and receiving data and control messages for information writing between devices; Figure 5 α, b is a diagram showing the initial writing on the recording medium, FIG. 6 is a block diagram showing an embodiment of the invention, and FIG. 75 is a flowchart for explaining the operation. 101...Information processing device 102...Information storage device 103...Recording medium n, n+1 =-N -1, N sector number
10104...Interface circuit 105.
... Data buffer circuit 106 ... Read/write circuit 107 ... Microprocessor 10B ... Control memory 1-. 109...Access circuit 110...Access mechanism O 1 Leap O Otsu Figure 3 Figure 4 Ratio 4th country and 5;

Claims (1)

[Claims] 1. Consists of an information processing device and an information storage device. In an information processing system, rewriting after the operation of writing information to an information storage device is interrupted. When the information processing device performs the data storage, the information processing device stores the information. Transferring the same write information as the operation and information indicating rewriting to the device; An information writing control method characterized in that the storage device distinguishes between read/write portions and unwritten portions, and continues writing unwritten information after the previous interruption to the interrupted portion.