JPS58101359A - Information file accessing system - Google Patents

Abstract

PURPOSE:To reduce the processing time when data transfer is not required between memories, by setting the access order to a sector address access sequence storage means at write/readout and changing the order of access. CONSTITUTION:In write, the gap of data transfer time between memories is calculated and a sector address is stored in an optimum sector address access order storage register 11 in the order of A1, A2, A3...B1, B2. In write, the sector addresses are stored from the register 11 to an access sector address storage register 10 in the said order after the data transfer time between memories. The readout check is done at a checker of a CRC generator 1. The sector addresses are stored in the order of the sector arrangement, A1, B1, C1,...A2, B2, C2,... on a recording medium 1 to the register 11. The check is performed in this order.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an access method suitable for high-speed access of information files.

First, as an example of the conventional information file access method,
About magnetic file access methods.

This will be explained using FIGS. 1 and 2. Figure 1 shows sectors (Al, A2...; B1°B2
．． ... ; c 1 * c 2 ...), where n is the distance the head moves within the data transfer time between memories for one sector, and arrow R indicates the rotation direction of the recording medium. It shows. FIG. 2 shows the operation of enrichment and gun extraction check for consecutive sectors starting from sector A1 in chronological order, where 1 indicates inter-memory data, transfer time, $2 indicates rotation waiting time, AI, A2. . . . are sectors Al, A2 . . . indicates the write or read check operation time.

In the conventional access method, the write operation is as shown in Figure 2 (
4), sectors Al, A2. A3. ....

Bl, B2. ..., and the read check operation is executed in the order of writing as shown in Figure 2 (B), so even if data transfer between memories is not necessary, it may take the same amount of time as writing. Ta. Note that T is the time required for the medium to rotate once.

The present invention has been made in view of the above circumstances, and its purpose is to eliminate the above-mentioned drawbacks of conventional information file access methods, and to shorten processing time when data transfer between memories is not required. The objective is to provide a method for accessing information files that makes it possible to access information files.

The above object of the present invention is to provide an information file device comprising an information file and an information file controller that controls the information file, and to provide sector address/access order storage means to store the sector address/access order when writing/reading to/from the information file. This is achieved by an information file access method characterized in that the access order to the information file can be changed by setting the access order in the access order storage means.

The access method of the present invention does not require inter-memory data transfer to 1%.When checking the read of the write bale, the read check time can be significantly shortened by setting the sector address/access order storage means in the order of the sector arrangement. It has the seven greatest effects.

3N shows an outline of a magnetic file write/successive access control circuit according to an embodiment of the present invention. In FIG. 5, 1 is a recording medium, 2 is a write/read head, and 3
is an amplifier that controls the current of the write/sequence head 2;
is a memory, 5 is a buffer register for data transfer with the memory storage, 6 is a storage register for one sector of data, 7 is a data serial/parallel conversion circuit, 8 is a CRC generator/checker, 9 is an access control circuit, and 10 is a Access/sector address storage register 11 is an optimum sector address/access order storage register.

Next, the operation of the circuit of this embodiment will be explained based on FIG. First, in the write operation, as shown in FIG.
2. Mu3. ...n 1 e vt 2e...11
Stores 11k sector address. As a result.

Following the memory related data transfer time -1, from the optimum sector address/access order storage register 11.

Sector addresses Al, A2 . Mu3...81. B2. . . . are displayed one after another, and writing is performed sequentially.

When transitioning to the read check operation after writing is completed, this operation is only a check by the CRC generator/checker 8, and the inter-memory data transfer time $1 is not required, so it is optimal as shown in FIG. Sector address/access order stored register IK sector arrangement order,
That is, MU1sgLC1,...a 2 e n 2
Sector addresses are stored in the order of t C2t ;.... As a result, the sector address system 1 t B 1 t Cl is transferred from the optimal sector address/access order storage register 11 to the access/sector address storage register 10.
*...A2,112. It is read out to the boat of C2,...
A continuation check is performed.

Said optimum sector address/access order storage register 1
The contents of 1 are changed by an optimum sector address/access order storage register set instruction issued in synchronization with a write/read command.

This can also be done in other ways.

In the above embodiments, a magnetic file device was taken as an example, but the present invention is applicable not only to magnetic file devices but also to, for example, so-called optical disk devices.

As described above, according to the present invention, in an information file device comprising an information file and an information file controller that controls the information file, sector address/access order storage means is provided to write/continuously write to the information file. By setting the access order in the sector address/access order storage means, the access order to the information file can be changed, thereby eliminating wasted time in accessing the information file and significantly shortening the processing time. If an information file access method is realized, significant effects will be obtained.

[Brief explanation of the drawing]

15A is a diagram showing the arrangement of sectors, FIG. 2 is a time chart showing the filling operation (4) and read check operation (B) in the conventional access method, and FIG. 3 is a magnetic A diagram showing a file access control circuit,
FIG. 4 is a time chart showing write operation (B) and read check operation (B) in the apparatus of this embodiment. 1: Recording medium, 2: Write/read head, 3: Amplifier, 4 = Memory, 5 = Buffer register for data transfer, 6
: data storage register, 7: data serial/parallel conversion circuit, 5: CRC generator/checker, 9: access control circuit, 10: access/sector address storage register, 11: optimum sector address/access order storage register. Figure 1 l Figure 2 Time

Claims (1)

[Claims] (1) In an information file device comprising an information file and an information file controller that controls the information file, a sector address/access order storage means is provided to store the sector address/access order at the time of writing/reading to/from the information file. An information file access method characterized in that the access order to the information file can be changed by setting the access order in the means. e) The information file according to claim 1, wherein the sector address/access order storage means is set in the order of sector arrangement when performing a continuation check after writing that does not require inter-memory data transfer. access method.