JP2771986B2 - Magnetic tape unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] A magnetic tape device that creates and writes a file list when copying a plurality of program files onto a magnetic tape. A member list file can be read from a tape in a short time and a tape can be created. In order to eliminate the need for subsequent file name updates, the specified file name of the program file to be written to tape from DASD is stored in the memory table, and the corresponding file name is extracted from the table one by one. Write the file from DASD to the tape, and if it determines that the file name is a predetermined member list file, rewrite the contents of the corresponding program file into the table contents and write it to the beginning of the tape. .

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape device that creates and writes a member list file indicating a file list when copying a plurality of program files onto a magnetic tape.

For test programs used for computer system maintenance and inspection, a plurality of source programs that can be used in common for various computer systems are stored in a storage unit on DASD or the like on the service side and prepared. For this computer system, a test magnetic tape is created by copying the necessary program files from DASD to the magnetic tape.

When creating a test magnetic tape as described above, a member list file is created and written as a list of program files stored on the magnetic tape, and the contents of the test magnetic tape are immediately read by referring to the member list file. It is desirable to be able to grasp.

[Prior Art] FIG. 7 is an explanatory view showing a conventional magnetic tape device.

In FIG. 7, for example, a plurality of program files f1, f2, f3,..., Fn are stored in the DASD 10a for testing. When creating a test magnetic tape 12,
The process of reading one by one from the specified file DASD 10a and writing it to the magnetic tape 12 is repeated, and as a result, the magnetic tape
12, program files f1, f2, f3,..., Fn are created.

At this time, when writing a list of the program files f1, f2, f3,..., Fn created on the magnetic tape 12 as a member list file, the file names created on the tape are sequentially written and remembered on the memory table 14. Finally, the contents of the memory table 14 are written to the magnetic tape 12 to create a member list file fm.

[Problems to be Solved by the Invention] However, in such a conventional magnetic tape device, when a list of file names on a magnetic taper is read, a member list file is created at the final position of the magnetic tape. Therefore, there is a problem that it takes time to read the member list file.

Also, DASD is used by many unspecified people on the service side to create magnetic tapes for a wide variety of computer systems, so even if the same program file is specified, different file names may be specified depending on the service target. is there. For this reason, if you notice that the file name is different after creating a member list file using the contents of the memory table created in advance as it is,
The member list file created at the last position of the tape must be read and the file name must be updated anew on the memory table, and updating the file name takes time.

The present invention has been made in view of such a conventional problem, and provides a magnetic tape device that can read a member list file from a tape in a short time and that does not require updating of a file name after tape creation. The purpose is to:

[Means for Solving the Problems] FIG. 1 is an explanatory view of the principle of the present invention.

In FIG. 1, in the member list file creation method of the present invention, a plurality of predetermined program files (f1, f2, f3,..., Fn) are stored and a specific program file f2 is stored in a member list file. A storage unit 10 such as a DASD prepared for creation; a memory table 14 for storing a file name of a specified program file to be written from the storage unit 10 to the magnetic tape 12;
The program file corresponding to the file name is read out from the storage unit 10 and the magnetic tape 12 is read out.
And a write processing unit 16 for writing the data into the.

When the write processing unit 16 determines that the file name is a predetermined member list file, the content of the program file f2 read from the storage unit 10 corresponding to the file name is stored in a memory. Table 14
And write it at an arbitrary position on the magnetic tape 12, preferably at the leading position.

[Operation] According to the magnetic tape device of the present invention, since the member list file is created at the head position of the magnetic tape, the processing time for reading the file name list from the tape can be reduced. Can be.

Even if the contents of the file name to be created change, the changed file name specified at the time of tape creation is stored in the six memory table, and the contents of this table are written in the contents of the determined member list file program. Since writing to the tape is performed instead, it is not necessary to update the file name of the member list file after the tape is created, and the work efficiency of the tape creation can be improved.

That is, as for the program files f1 to fn of the storage unit 10, those corresponding to the memory table 14 are sequentially read, but when the program file f2 is read, the program file f2 is a predetermined member list file. Is determined. In that case, the program file
The content of f2 is rewritten to the content of the memo table 14.
At this time, since the contents of the memory table 14 are the contents specified by the operator, if the contents are stored in a list of program files to be copied from the storage unit 10 to the magnetic tape 12, the program files read from the storage unit 10 f2
Is a member list file representing the list. Since the contents are specified by the operator, an arbitrary file name different from the file name stored in the storage unit 10 can be used.

[Embodiment] FIG. 2 is a block diagram of an embodiment showing an embodiment of the present invention by taking a test program tape as an example.

In FIG. 2, reference numeral 10a denotes a DASD (Direct Access Storage Device) as a storage unit. DA
A plurality of program files are stored in the SD 10a in advance as test CRTEMOS programs. That is, the program file IPL1 is an initial program routine for test processing, and the program file HCB1 is a hard core builder, and the initial processing of the test program is performed by the IPL1 and HCB1. In addition, DASD10
a contains the program file SPM2 as a test module,
SPMTBL, OLTEC, JYOMT1,... Are stored in advance, and these program files are to be created as member list files.

Reference numeral 14 denotes a memory table in which file names for transferring the test CRTEMOS program stored in the DASD 10a to the magnetic tape 12 are stored. The file name corresponding to the memory table 14 is stored in the control statement SYSIN of the CRTEMOS program.
Execute the member files SPN2, SPMTBL, OLTEC, JYOMT1,…
Are stored in the memory table 14 when the operator determines a file name corresponding to each of the above. In FIG. 2, the file name is DASD10 for simplicity.
The name of the member file stored in a is shown as it is.

Reference numeral 16 denotes a write processing unit which repeats a process of taking out the file names stored in the memory table 14 one by one from the beginning, reading out the member files of the DASD 10a corresponding to the taken out files, and writing them on the magnetic tape 12.

Here, of the plurality of member files stored in the DASD 10a, the second member file SPMTBL is prepared in advance for creating a member list file, and the file SPMTBL for creating the member list file is as shown in FIG. The data part following the header part is an empty area.

When the write control unit 16 retrieves the second file name SPMTBL from the memory table 14, it determines that this file name is a predetermined member list file, and in accordance with this file name, reads the file SPMTBL from the DASD 10a. Read the contents of file SPMTBL into the memory table
The contents are replaced with the contents of 14 and written on the magnetic tape 12.

Here, since the contents of the memory table 14 are arbitrarily input by the operator using the control statement SYSIN as described above, the contents of the file SPMTBL are replaced with the contents arbitrarily input by the operator. Therefore, if the content entered by the operator is a file list for copying multiple program files to a magnetic tape,
The contents of the file SPMTBL are listed in the file.

FIG. 3 shows a CRTEMOS for testing in the embodiment of FIG.
It is an explanatory diagram of the input / output data set of the program.When creating a test magnetic tape, the control statement SYIN, the input data set SYSOB1 in the object format, and the input data set SYSLD1 in the load module format are executed for the CRTEMOS program. The output data set SYSMT1 is performed on the magnetic tape, and the message data set SYSPRINT such as the contents can be written on the magnetic tape.

FIG. 4 shows control statements of such a test CRTEMOS program of FIG.

Next, a process of creating a member list file according to the embodiment of FIG. 2 will be described with reference to the operation flowcharts of FIGS. 5A and 5B.

In FIG. 5A, first, in step S1, the control statement given by SYSIN of FIG. 4 is read, and step S2, step S3
Through step S4 to set the name of the IPL program, return to step S1 again, further proceed from step S5 to step S6, set the name of the HCB program, and again step from step S1 to step S7. Proceeding to S8, all the file names of the test module are read, and the file names are stored in the memory table 14.

When the storage of the test module file name in the memory table 14 in step S8 is completed, the step
Proceeding to step S9 via S2, read the IPL program from DASD 10a, read the HCB program from DASD 10a in step S10, write the IPL program to the magnetic tape 12 in step S11, and magnetically copy the HCB program in step S12. Write on tape 12.

Subsequently, the process proceeds to step S13 in FIG.
A table address is set as a pointer for extracting a file name to be created from the beginning of the memory table 14.

Subsequently, in step S14, the file name SPM2 stored at the beginning of the memory table 14 is extracted, and the process proceeds to step S16 via a check step of completion of extraction in step S15, and the file name extracted in step S14 is used for creating a member list file. Check whether the file name is SPMTBL. Since the file name extracted at this time is SPM2, the process proceeds to step S18 to read the program corresponding to the file name SPM2 from the DASD 10a, and write it to the magnetic tape in step S19.

When the tape writing process in step S19 is completed, the process returns to step S14, retrieves the second file name SPMTBL from the memory table 14, and proceeds to step S16 via step S15. In step S16, the extracted file name is the file name SPMT for creating the member list file.
Since it matches BL, proceed to step S20, read the SPMTBL program for member list file creation from DASD 10a, and in the next step S12, rewrite the data part of the SPMTBL program with the contents of the file name stored in the memory table 14, The SPMTBL program whose contents have been rewritten in the next step S22 is written on a magnetic tape.

That is, in the processing of steps S20 to S22, as shown in FIG. 6, in the SPMTBL program before the replacement read from the DASD 10a, the data part following the header part is secured as an empty area, and the data part which becomes this empty area By replacing the file name stored in the memory table 14 with the SPMTBL program after the replacement and writing the program on the magnetic tape, a member list file can be created on the magnetic tape 12 by writing the SPMTBL. .

Referring back to FIG. 5B, when the tape writing of the SPMTBL program rewritten to the table content in step S22 is completed, the process returns to step S14 again to return to the memory table 1.
The fourth file name OLTEC is read from the fourth, and the program corresponding to the file name is read from DASD in step S18 and the writing process to the magnetic tape is repeated in step S19, as in the case of the first file name SPM2.

By the processing of steps S14 to S19, the memory table 14
When the writing of all the programs specified as the file names to the magnetic tape 12 is completed, it is determined in step S14 that the extraction of the file names has been completed, and the series of processing ends.

As is apparent from the member list file creation processing of FIGS. 5A and 5B, in the creation method of the present invention, it was determined that the file name extracted from the memory table 14 was a predetermined member list file. Sometimes, a member list file can be created on the magnetic tape 12 by replacing the contents of the program file read from the DASD 10a with the contents of the memory table 14 according to the file name and writing the contents on the magnetic tape 12. Since the second program SPMTBL among the plurality of programs is created as a member list file, the member list file can be created at the leading end of the magnetic tape 12, and as a result, a list of file names from the magnetic tape can be obtained. Can be read in a short time.

On the other hand, for the file name created as a member list file, the operator specifies the file name each time the SYSIN control statement is executed, stores the specified file name in the memory table 14, and creates the member list file on the magnetic tape. Therefore, even when an unspecified number of users specify different file names for the same test program as appropriate, the file name specified each time can be directly created as a member list file on a magnetic tape. When the file name is different, the update can be performed when the file name is stored in the memory table 14.Therefore, there is no need to read the member list file after the tape is created and update the file name again, and the member list file is created. Work efficiency can be greatly improved.

In the above embodiment, the member list file is created when the test program is transferred to the magnetic tape. However, the present invention is not limited to this. A plurality of available programs can be stored, and a suitable program that specifies a file name from among them and transfers the program to a magnetic tape can be applied as it is.

[Effects of the Invention] As described above, according to the present invention, a member list file as a list of program files is created at the head position of the tape, so that the reading time of the member list file from the tape is reduced. Can be significantly reduced.

Also, since the file name can be updated when creating the member list file on the magnetic tape, it is not necessary to read the member list file again after the tape is created and update the file name, and a different file name can be set in advance. Even in this state, the file name can be updated efficiently, and the work efficiency of magnetic tape creation including creation of a member list file can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining the principle of the present invention; FIG. 2 is a diagram showing an embodiment showing an embodiment of the present invention; FIG. 3 is a diagram for explaining an input / output data set of a test CRTEMOS program in FIG. FIG. 4 is an explanatory diagram of a control sentence of the CRTEMOS program in FIG. 2; FIGS. 5A and 5B are operation flow diagrams of the present invention; FIG. 6 is an explanatory diagram of file name rewriting of the present invention; FIG. FIG. In the figure, 10: Storage unit 10a: DASD 12: Magnetic tape 14: Memory table 16: Write processing unit SPM2, OLTEC, JYOMT1: Member program (test module) SPMTBL: Program for member list file

Claims (1)

(57) [Claims] A plurality of predetermined program files (f
1, f2, f3,..., Fn) and a specific program file (f2) prepared for creating a member list file; and from the storage unit (10) to the magnetic tape (12). A memory table (14) for storing a file name of a specified program file to be written; and file names are taken out one by one from the memory table (14), and a program file corresponding to the file name is stored in the storage unit (10). And a write processing unit (16) for reading from the magnetic tape (12) and writing the magnetic tape (12) when the write processing unit (16) determines that the file name is a predetermined member list file. The contents of the program file (f2) read from the storage unit (10) corresponding to the file name are rewritten to the contents of the memory table (14) and written to an arbitrary position on the magnetic tape (12). This Magnetic tape apparatus according to claim.