JPS62137642A - Plural os storing system - Google Patents

Abstract

PURPOSE:To make switching of OS easy by storing the same OS while dividing it into plural patterns, providing a changeable area that controls one of them as an active state OS, and enabling to load OS basing on the area. CONSTITUTION:When constituting OS of a loader IPL of a monitor, the main body of a monitor MON and a functional constituent INF, OS1, OS2 etc. are prepared as OS of different revision etc. At this time, IPL1, MON1, INF1 are prepared as corresponding to OS1 and IPL2, MON2, INF2 are prepared as corresponding to OS2 in a disk unit as subjects. A fixed area 1 in the disk is allotted as an active area and a pointer is made to IPL, MON, INF. When controlling by OS1, the starting point of IPL1 is stored in the pointer of IPL etc., and the pointer to the subject of OS is stored in the area 1 by an OS switching program 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multiple OS storage system, and particularly to a multiple OS storage system that has OS switching characterized by several patterns.

[Conventional technology]

Conventionally, when changing the characteristics of an OS, the system has to be generated or rebuilt. This is because the file that stores the OS is the only one in the system.

[Problem that the invention seeks to solve]

For this reason, the above-described conventional method of changing OS characteristics involves changing system generation, which has the disadvantage of requiring time and effort. For example, even if the OS function is temporarily changed and then restored to its original state, it is necessary to perform system generation to change the OS function, and then perform system generation again to restore the original state.

[Means for solving problems]

The multiple OS storage method of the present invention includes: a fixed disk storing OSs divided into several patterns of characteristics; an area within the fixed disk for managing one of the plurality of OSes as the active OS; It is configured to include a program that changes the active OS by changing this area, and a loader that loads the OS based on this area.

〔Example〕

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

FIG. 1 is a block diagram showing one embodiment of the present invention, and is a configuration diagram of a disk storing an OS. For example, if the OS consists of the monitor's rotor IPL), the monitor itself (MON), and the OS's functional configuration information (INF), the OS may be of a different revision or have a different functional configuration.
As a method of preparing OSI, 082, etc.,
IPLI, MONI, IN are compatible with OS1.
IPL2.FI corresponds to 082. MON
2. Prepare lNF2 as an entity in the disk device. Allocate a fixed area on the disk as a management area for the active OS and perform IPL here.

It has pointers for MON and INF.

Now, in order to control with OS1, the IPL pointer must be
The start position of PLI is stored in the MON pointer, the start position of MONI is stored in the INF pointer, and the start position of INFI is stored in the INF pointer. Storing a pointer to the actual OS in the active OS management area is performed by the OS switching program.

FIG. 2 is a flow chart for explaining the operation of starting the OS in the embodiment shown in FIG.

The boot loader of the system learns the storage location of the IPL from the management area of the active OS and loads the IPL. IP
After loading L, control is passed to IPL. IPL similarly knows the storage location of I song N from the management area of the active OS.
Load N. MON reads INF from the management area of the active OS and defines the characteristics of the OS. With this structure, 081 is activated in the example. Next, in the OS switching program 4, the active OS management area l is set to 082 (IPL2).
゜MON2. INF2), OS2 will be started in the next system startup operation.

〔Effect of the invention〕

The multiple OS storage method of the present invention allows multiple OSs to be stored on a disk.
By storing the active OS in a fixed area on the disk, the OS can be easily switched.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a t&n diagram for explaining the operation of the embodiment shown in FIG. 1...Active@OS management area, 2...Characteristic OSl element, 3...Characteristic OS2 summary, 4...
...OS switching program. ′, −′, ノ′

Claims (1)

[Claims] The same OS is divided into several patterns based on differences in revisions and functional configurations, and a fixed disk that stores these patterns and one of these multiple OSes are used as the active OS.
An OS switching system with several characteristics, consisting of an area in a fixed disk that is managed as an OS, a program that changes this area, and a loader that loads the OS based on the area that manages the active OS. A multiple OS storage method characterized by easy implementation.