JPH05204551A - Flexible disk data set copy system with data set area reservation - Google Patents

Abstract

PURPOSE:To prevent a failure in area reservation and copying at the time of copying a data set to a flexible disk. CONSTITUTION:A copy data set name 14 and a number 15 of data records are prepared in the first record of a copy source data set, and they are inputted to perform the check of overlapped names in a data set name check part 8, data set area reservation of a data set area reserving part 11, and data set copying of a data set copy part 13, thus preventing a failure in area reservation and copying due to misoperation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible disk data set copying system with a data set area reservation for copying a data set on another medium to a flexible disk.

[0002]

2. Description of the Related Art Conventionally, when copying a data set of another medium to a flexible disk, the number of data records in the copy source data set is checked, and the data to be the copy destination is first set in the data set label of the flexible disk based on the value. Secure a write area for the set name and the number of data records. After that, a copy source data set name and a copy destination data set name are designated, and data is copied using a means for copying the data set. Therefore, the operator must manually input the data set name when allocating the area to the flexible disk, the data record number input operation, and the copy source data set name input operation and the copy destination data set name input operation when using the data set copying method. It was done.

[0003]

In this conventional method of securing the data set area on the flexible disk and copying the data set, the operator manually inputs the data set name and the number of data records, which imposes a heavy burden on the operator. In addition, there is a problem that it causes a failure to secure the dataset area and a failure to copy the dataset due to an input error.

[0004]

According to the flexible disk data set copy method with a data set area reservation of the present invention, a copy source data set having a copy data set name and the number of data records is read in the first record, and the copy destination is flexible. It consists of a data set name inspecting unit that searches the data set label of the disk and inspects the data set name, an area reserving unit that inspects and reserves an area according to the number of data records, and a copying unit that copies actual data records. If the data set label of the copy destination flexible disk contains a data set with the same name as the copy data set name, another flexible disk is requested to be loaded, and if it does not exist, there is an area to store the number of data records of the copy source data set. Check if there is, and if there is no storage area, do the same. When it is requested to load and store a flexible disk, the data set name, the beginning of the extent (BOE), the end of the extent (EOE), and the end of the dataset (EOD) are placed at predetermined positions of the data set label of the flexible disk. ), The actual data record is stored after the writing area is secured.

[0005]

According to the present invention, the operator only needs to input the copy source data set name to automatically secure the area on the copy destination flexible disk and copy the data set.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view for explaining an embodiment of the present invention. FIG. 1 (a) is a data set label of a flexible disk, 1 is label identification, 2 is data set name, 3 is Start of extent (BOE), 4 end of extent (EOE), 5 end of dataset (EO)
D) is shown. FIG. 1B is a flowchart showing the flow of processing. 6 is the input of the copy source data set name, 7 is the input of the first record of the copy source data set, and 8 is the first record having the copy data set name and the number of data records. A data set name inspection unit that reads the copy source data set, searches the data set label of the flexible disk that is the copy destination, and inspects the data set name, 9 is the result obtained by this data set name inspection unit, and 10 is another medium A loading message output, 11 is a data set area reserving section for inspecting and reserving an area based on the number of data records, 12 is a result obtained by this area reserving section 11, and 13 is a data set copying section for copying an actual data record. Figure 1
(C) is the first record of the copy source data set, which is 1
Reference numeral 4 indicates a copy data set name, and 15 indicates the number of data records.

If a data set having the same name as the copy data set name exists in the data set label of the copy destination flexible disk, loading of another flexible disk is requested, and if it does not exist, the number of data records in the copy source data set is displayed. If there is a storage area, it is inspected.If there is no storage area, another flexible disk is requested to be loaded, and when it can be stored, the data set name and extent are stored at the specified position of the flexible disk data set label. After the write area is reserved at the beginning (BOE) and the end of the extent (EOE) and the end of the data set (EOD), the actual data record is stored.

Next, the operation of the embodiment shown in FIG. 1 will be described with reference to FIG.
This will be described with reference to (b). First, the operator inputs the copy source data set name (see copy source data set name input 6), then reads the first record from the copy source data set (see the first record input 7 of the copy source data set), and the data set The name inspecting unit 8 inspects the data set label of the copy destination flexible disk and checks whether there is an empty label or the same data set name as the copy data set name 14, and if there is no empty label or the same. If the data set name already exists, another flexible disk loading message is output, and after the flexible disk loading by the operator, the process returns to the data set name inspection unit 8. If the data set name checking unit 8 has succeeded in checking, the data set area securing unit 1
Moving to 1, it is inspected whether the copy destination flexible disk has an area for storing 15 data records. Here, if the number of data records is less than 15, the message of loading another flexible disk is output, and after loading, the process returns to the data set name inspection unit 8.

Next, the inspection in the data set area reserving section 11 can be decided by the extent start 3 and the extent end 4 and the number of storable cases in the form of the flexible disk when some data set already exists in the flexible disk. .. For example, in the case of a double-sided double density of 8 inches (generally called 2D), the number of records that can be stored in the flexible disk is 3848 records from 1 cylinder, 0 side, 1 track to 74 cylinders, 1 side, 26 tracks. Therefore, if the data set already exists, it can be obtained by subtracting the number of records in the existing data set from this value. Then, when the inspection of the data set area securing unit 11 is successful, the label identification 1 is rewritten to HDR1, the data set name 2 is rewritten to the copy data set name 14, and the beginning 3 of the extent is the existing data set on the copy destination flexible disk. If not, rewrite to 1 cylinder, 0 side, 1 track. If the data set already exists, rewrite with the value that becomes the head position of the area inspected by the data set area reserving unit 11, end of extent 4 and data set. At the end 5, it is rewritten with a value obtained by adding 15 data records to the beginning 3 of the extent. After that, the process moves to the data set copying unit 13 to read the copy source data set and start the extent 3 of the extent of the copy destination data set.
Copy from the position of.

[0010]

As described above, according to the present invention, the operator automatically reserves an area on the copy destination flexible disk and copies the data set only by inputting the copy source data set name. Therefore, it is possible to reduce the operation of the operator and prevent an operation error.

[Brief description of drawings]

FIG. 1 is an explanatory diagram for explaining an embodiment of the present invention.

[Explanation of symbols]

 1 label identification 2 data set name 3 start of extent 4 end of extent 5 end of data set 6 input of copy source data set name 7 input of first record of copy source data set 8 data set name inspection section 9 data set name inspection result 10 separate Output of media loading message 11 Data set area securing section 12 Data set area securing result 13 Data set copying section 14 Copy data set name 15 Number of data set records

Claims (1)

[Claims] 1. A copy source data set having a copy data set name and the number of data records is read into the first record,
A data set name inspecting unit that searches the data set label of the flexible disk that is the copy destination and inspects the data set name, an area reserving unit that inspects and secures an area based on the number of data records, and a copying unit that copies the actual data record. When the data set label of the copy destination flexible disk has the same data set as the copy data set name, another flexible disk is requested to be loaded, and when it does not exist, the number of data records of the copy source data set Is checked, and if there is no storage area, another flexible disk is similarly requested to be loaded, and when it can be stored, a data set name and Extent start and end and data set After securing the write area of the end, the data set area allocation with the flexible disk dataset copying method is characterized in that so as to store the actual data record.