JPH0488419A - Area control system for magnetooptic disk medium - Google Patents

Abstract

PURPOSE:To utilize the magnetooptic disk medium effectively by securing an area of only necessary size on the magnetooptic disk medium, and releasing and registering an area which becomes unnecessary as a free area. CONSTITUTION:The medium has a field 31 to which the number of a device where the magnetooptic disk medium on which an area is to be secured is loaded is inputted, a filed 32 to which the size of the area to be secured is inputted, a field 33 where the start address of the area to be secured is displayed and inputted, a field 34 where a label name is inputted when the area to be secured is given the volume label, and a field 35 where it is confirmed whether or not a process may be started or not after respective parameters are inputted. Then an area which becomes unnecessary among plural secured usable area is selected and released and when there is a free area connecting with the start address or end address of the released area, the those free area are registered as one free area. Consequently, the magnetooptic disk medium can be utilized effectively.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an area management system for a magneto-optical disk medium.

[Conventional technology]

BACKGROUND ART Conventionally, there has been a magnetic disk drive as a high-capacity peripheral device connected to a personal computer and capable of high-speed access, but it has been impossible to replace the disk medium depending on the intended use. However, in a magneto-optical disk device, it is possible to exchange media, and the program that manages the volume of the magneto-optical disk medium stores values such as the size and number of logical volumes, and data related to the specifications of each logical volume. It was kept as a fixed value and operated.

[Problem to be solved by the invention]

In the above-mentioned conventional area management method for magneto-optical disk media, the program that manages the volume of the magneto-optical disk medium fixes values such as the size and number of logical volumes and data related to the specifications of each logical volume. Since it was used as a value, the size of the area when allocating an area on the medium was only a fixed size area,
Since the number of areas to be secured is determined, it is possible to create unnecessary areas, or conversely, the number of areas is insufficient, or the size of the area is too small, making it difficult to use the magneto-optical disk medium effectively. The problem was that it could not be used for

SUMMARY OF THE INVENTION An object of the present invention is to provide an area management method for a magneto-optical disk medium that can secure several areas as a large area and make effective use of the magneto-optical disk medium. .

[Means to solve the problem]

The area management method for a magneto-optical disk medium of the present invention is an area management method for a magneto-optical disk medium in a magneto-optical disk device connected to a personal computer. (B) a second step of searching for a free space larger than the size input in the first step; (C) if sufficient free space is found in the second step; A third step of searching for a free area at the lowest address among them; (D) a determination is made as to whether or not the area to be allocated as the available area is to be taken from the free area obtained in the third step; , a fourth step of allocating the area indicated by the start address input from the outside as a usable area when the empty area obtained in the third step is not used; When releasing an area that is no longer needed among the available areas, select the area to be released,
The method includes the steps of releasing the area and, if there is an empty area continuous to the start address or end address of the released area, registering the empty area as one empty area.

Furthermore, in the area management method for a magneto-optical disk or disk medium of the present invention, in the area management method for a magneto-optical disk medium in a magneto-optical disk device connected to a personal computer, (A) the usable area of the magneto-optical disk medium is A secured area input means for inputting a size; (B) a free area search means for searching whether there is a free space larger than the size input by the secured area input means; (C) the free area search means is sufficient. (D) whether the area to be allocated as the usable area is taken from the free area obtained by the secured area allocation means; a reserved area selecting means for allocating an area indicated by an externally input start address as a usable area when a determination is made indicating whether or not the reserved area is to be taken from the empty area obtained by the reserved area allocating means; When releasing an area that is no longer needed among multiple secured usable areas, the area to be released is selected, the area is released, and the area of the released area is If there is an empty area that is continuous to the start address or end address, the area release means registers the empty area as one empty area.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a flowchart showing the operational procedure when securing an area on a magneto-optical disk medium according to an embodiment of the present invention.

The area management method for magneto-optical disk media includes an area securing means that secures an area input by an operator, and when releasing an area that is no longer used among multiple secured usable areas, the area to be released is and an area release means that selects the area, releases the area, and registers the empty area as one empty area if there is an empty area that is continuous to the start address or end address of the released area. There is.

In addition, the area securing means includes a securing area inputting means for inputting the size of the usable area of the magneto-optical disk medium that the operator wants to secure for use, and whether there is a free area larger than the size input by the securing area inputting means. If the free space searching means finds sufficient free space, the secured area allocating means searches for the free space at the lowest address among them, and the space to be allocated as the used area is
A determination is made to indicate whether or not to take from the free space obtained by the reserved area allocation means, and when it is not taken from the free space obtained by the secured area allocation means, the area indicated by the start address input from the outside is used as the available area. It consists of a reserved area selection means for allocating as a.

Next, the operation will be explained.

In FIG. 1, when the operator inputs the size of the area to be secured from now on the magneto-optical disk medium using the secured area input means (step 11), the free area searching means searches for all free space on the magneto-optical disk medium. The area is checked for a free area larger than the area input in step 11, and if there is not the requested free area, the process returns to step 11 and the operator is asked to re-input the desired size (step 12). When there is an empty area of the size requested by the reserved area allocation means, the start address of the area is displayed and the empty area with the lowest address that can satisfy the requested size is searched (step 13). )
. Then, the operator uses the secured area selection means to determine whether the area is appropriate as an area to secure (step 14), and if there is a problem with securing the area starting from the displayed start address, the operator The operator is prompted to input the area start address to be processed (step 15). When the area start address is changed to the address input by the operator in step 15, a search is made to see if there is an empty area of the size input in step 11 in the area starting with that address, and the size of the empty area is determined to be unreasonable. If it is sufficient, the area start address is input again (step 16).

Once the starting address for securing the area has been determined,
From there, an area of the size input in step 11 is secured, and step 17) the process is terminated.

FIG. 2 is a flowchart showing the operation procedure when releasing an area in the area management system of the magneto-optical disk medium shown in FIG.

From the information of each area displayed on the map, select the area to be released from now (Step 21), release that area, and check if there is an empty area at an address that is continuous with the start address or end address of the released area. If so, register them as one empty area (step 22).

FIG. 3 is a diagram showing an example of a screen display when securing an area.

In FIG. 3, 31 is a field for inputting the device number in which the magneto-optical disk medium for securing the area is loaded;
32 is a field for inputting the size of the area to be secured; 3
3 is a field for displaying and inputting the start address of the area to be secured, 34 is a field for inputting a label name when attaching a volume label to the area to be secured, and 35 is a field for starting processing after inputting each parameter. This field is for checking whether or not.

FIG. 4 is a diagram showing an example of a screen display when opening an area.

In FIG. 4, numeral 36 is a guideline that instructs the user to know information about the area when selecting an area to open.

FIG. 5 is a diagram showing an address space on a magneto-optical disk medium.

In FIG. 5, 41 is a system management area, which stores the type of operating system that can use the magneto-optical disk medium, the program to be executed when starting the system from this medium, etc. ing. 42 is volume management information contained within the system management area 41. This corresponds to each logical volume, is arranged in ascending order, and stores the start address, end address, etc. of the corresponding logical volume.

43, 44, and 45 are each logical volume 1.2.3 secured as a user area. Further, 46 stores specification data such as the logical sector length and number of logical sectors of each logical polyne.

〔Effect of the invention〕

As explained above, the present invention makes it possible to secure a necessary amount of area on a magneto-optical disk medium, and also by releasing an area that is no longer used and registering it as a free area. Since several areas can be grouped together and secured as a large area, there is an effect that the magneto-optical disk medium can be used effectively.

2 is a flowchart showing the operation procedure for releasing an area using the magneto-optical disk medium area management method shown in FIG. 1, and FIG. 3 is a diagram showing an example of a screen display when securing an area. , FIG. 4 is a diagram showing an example of a screen display when releasing an area, and FIG. 5 is a diagram showing an address space on a magneto-optical disk medium.

Agent Patent Attorney Susumu Uchihara

[Brief explanation of drawings]

FIG. 1 is a flowchart showing the operational procedure for securing an area on a magneto-optical disk medium according to an embodiment of the present invention. Diagram row? figure

Claims (1)

[Claims] 1. In a magneto-optical disk medium area management system in a magneto-optical disk device connected to a personal computer, (A) first step of inputting the size of the usable area of the magneto-optical disk medium; , (B) a second step of searching for a free space larger than the size input in the first step; (C) if sufficient free space is found in the second step, the lowest address among them; (D) A determination is made as to whether or not the area to be allocated as the usable area is taken from the free area obtained in the third step; a fourth step of allocating an area indicated by the start address input from the outside as a usable area when not taking it from the obtained empty area; When releasing an area that is no longer needed, select the area to be released,
A magneto-optical disk medium comprising the step of releasing the area and registering the empty area as one empty area if there is an empty area continuous to the start address or end address of the released area. Area management method. 2. In an area management method for a magneto-optical disk medium of a magneto-optical disk device connected to a personal computer, (A) a secured area input means for inputting the size of the usable area of the magneto-optical disk medium; (B) said secured area; (C) If sufficient free space is found by the free space search means, a free space search means for searching whether there is a free space larger than the size inputted by the space input means; (D) A determination is made indicating whether or not an area to be allocated as the usable area is taken from the free area obtained by the secured area allocating means, and the secured area allocating means searches for a certain free area. a reserved area selecting means for allocating an area indicated by an externally input start address as a usable area when the empty area is not taken from an empty area; When releasing an area that is no longer needed among the areas, select the area to be released,
A magneto-optical disk characterized in that it includes an area release means for releasing the area and, if there is an empty area continuous to the start address or end address of the released area, registering the empty area as one empty area. Media area management method.