KR100411131B1 - A multi-user computer system and a control method thereof - Google Patents

Abstract

The present invention relates to a multiuser computer system and a control method thereof. When the power is applied, the post process is performed, and the option ROM card is initialized during the post process. After confirming with the user, the disk allocation area of the user is set, and the booting process is performed. When the operating system tries to read / write to the disk, it maps the data to the user's area to read or save. This allows multiple users to use a single computer independently as if they were their own.

Description

A multi-user computer system and a control method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiuser computer system and a control method thereof, and more particularly, to a computer system and a control method for providing an environment in which a plurality of users can independently use one computer as their own computer.

In general, the use of computers is steadily increasing all over the world, and users are getting a lot of information through computers.

On the other hand, most families have one computer, and the family uses one computer.

In addition, it is necessary to use a single computer several times in a company or a school.

However, when multiple people use a single computer, it is difficult to guarantee their confidentiality, and the program or file contents used by others are easily exposed.

SUMMARY OF THE INVENTION The present invention has been made in an effort to solve the disadvantages of the related art, and to provide a computer system and a control method for setting an environment in which a computer used by several people may feel like a computer used only by oneself.

1 is a block diagram of a multiuser computer system according to an embodiment of the present invention.

2 is a block diagram of an optional ROM card according to an embodiment of the present invention.

3 is an operation flowchart until booting of a multiuser computer system according to an embodiment of the present invention.

4 and 5 show the input and output layers before and after the interrupt handler of the present invention intercepts the BIOS interrupt.

6 is a diagram illustrating a virtual partition of a hard disk according to a control method of a multiuser computer system according to an exemplary embodiment of the present invention.

7 and 8 are diagrams showing the states of the input and output layers before and after the filter driver of the present invention is inserted.

Fig. 9 is a flowchart of operation when input / output occurs in the control method of the multiuser computer system according to the embodiment of the present invention.

A computer system according to one aspect of the present invention for solving this problem,

In a computer system,

Hard disk drive for storing information,

When the power is applied, it performs a post process, performs a user confirmation procedure, sets a disk allocation area of the user, and controls the user to read or store data in the user area when the user selects read / write. It includes a control unit.

A computer system according to one aspect of the present invention for solving this problem,

In a computer system,

Hard disk drive for storing information,

When the power is applied, it performs a post process, performs a user confirmation procedure, sets a disk allocation area of the user, and controls the user to read or store data in the user area when the user selects read / write. It includes a control unit.

A computer system according to another aspect of the present invention for solving this problem,

In a computer system,

Hard disk drive for storing information,

An option ROM card incorporating a control program for allocating the disk after the post process;

When the power is applied, the post process is performed, and through the user confirmation procedure according to the control program of the option ROM card, the disk allocation area of the user is set, and when the user selects read / write, the area of the user It includes a central processing unit that controls to read or store data.

A control method of a computer system according to one aspect of the present invention for solving the above problems,

If power is applied, performing a post process and initializing an option ROM card;

Setting a disk allocation area of the corresponding user through a confirmation process of the user and performing a booting process;

If the user selects read / write, mapping the corresponding data to the user's area and reading or storing the data.

Then, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention.

1 is a block diagram of a computer system according to an embodiment of the present invention.

As in Figure 1, a computer system according to an embodiment of the present invention,

Hard disk drive (HDD, 19) for storing data,

A microcontroller 16 for controlling the hard disk;

A ROM 8 storing a bios;

A memory 9 which is a temporary storage device for loading various programs;

An option ROM card 14 incorporating a control program relating to disk allocation after the post process;

When the power is applied, the post process is performed, and through the user confirmation procedure according to the control program of the option ROM card 14, a disk allocation area of the hard disk drive 19 of the user is set, and the user A central processing unit 12 for controlling to read or store data in the user's area when selecting read / write;

A display controller 13 for controlling the display;

A display 11 for displaying information;

It includes a system bus 15, a keyboard 18, and a mouse 17.

The option ROM card 14,

An I / O request interceptor 202 for intercepting disk-related interrupts;

A user selector 201 for checking which user has permission to use;

An I / O request analysis unit 203 for analyzing the I / O request coming down from the operating system and extracting the required I / O starting sector number and the length to perform the I / O;

A mapping manager 204 for controlling a read and write operation of the user;

An I / O execution unit 205 for performing input / output under the control of the mapping manager;

When the I / O request from the operating system is a write request of an unassigned shared area, the allocation manager 206 may be configured to secure and map a predetermined space to an empty space of an individual user area.

The I / O request interceptor 202, the user selector 201, the I / O request interpreter 203, the mapping manager 204, the I / O performer 205, and the allocation manager 206. May be implemented in both hardware and software, and may be parallel if necessary.

Next, an operation of the computer system according to the embodiment of the present invention having such a configuration will be described in detail with reference to FIGS. 1 to 9.

3 is a flowchart of operations from power on to booting of the computer system according to an exemplary embodiment of the present invention.

First, the user turns on his computer 10 (S301). Then, the CPU 12 loads a basic input output system (BIOS) embedded in the ROM 8 into the RAM to perform a post power on self test (POST) process, and a disk-related interrupt is performed. After performing the BIOS interrupt initialization including a (S303), and finds the option ROM card 14 plugged into the slot of the system to initialize (S304).

At this time, the central processing unit 12 loads the control program embedded in the option ROM card 14 into the memory 9, and the central processing unit controls accordingly.

Here, the option ROM card 14 is mounted in an ISA slot or a PCI slot and may be manufactured integrally with the ROM 8 as necessary. It can also be operated by software without an optional ROM card.

When the BIOS 12 finds the option ROM card 14 by the BIOS, the control program is loaded into the memory 9 by intercepting input and output before the operating system starts to control input and output to the disk.

Next, when the CPU 12 controls the microcontroller 16 that controls the display such that the user inputs an ID and a password under the control of the user selector 201, the microcontroller 16 displays the display 11. A password input window is displayed on the display (S305).

Then, the user enters his ID and password through the keyboard 18 and the mouse 17 (S306).

Then, the CPU 12 prepares an individual user area corresponding to the user selected by the control of the user selector 201 (S307). In practice, the central processing unit 12 operates according to an operating system or a control program in a computer system, and in the following process, the program or the operating system is described as a main subject for convenience.

Next, the I / O request interceptor 201 seizes I / O to the hard disk drive 19 by intercepting a disk-related interrupt. In this case, the operating system (eg, DOS) that uses only interrupts to access the hard disk only needs to intercept disk-related interrupts immediately after initializing the option ROM card. On the other hand, in an operating system using a dedicated driver (for example, Window 95/98 / NT / 2000), the driver of the present invention should be inserted into the I / O layer at a time point designated by each operating system to start an operation. As shown in Fig. 4 or 5, a disk related interrupt or a dedicated driver controls the microcontroller 16 to perform input / output to the hard disk drive 19, which is provided by the operating system.

The interrupt handler 501 or the driver of the present invention including the I / O analyzer 203, the mapping manager 204, and the allocation manager 206 operates on an interrupt or driver 502 provided by the operating system. If you need to perform I / O to the hard disk, use these to perform I / O.

The driver structure of the present invention is modified according to each operating system.

Thereafter, the CPU 12 performs booting, installs programs and directories used by the corresponding user, and makes the computer workable (S309). At this time, the hard disk area of the hard disk drive 19 is virtually divided, as shown in FIG.

As shown in Fig. 6, the area of the hard disk is divided into a shared area and a separate area for each user. For example, User2 will use separate user and shared areas for User2. Therefore, even if several people use the same computer, it is the same as using their own computer.

In the case of using a dedicated driver, the filter driver 802 of the present invention including the I / O analyzer 203, the mapping manager 204, and the allocation manager 206 is inserted into the I / O layer of the operating system. The state before and after is shown in FIG. 7 and FIG.

As shown in Fig. 7, the I / O layer includes a file system driver 701, a disk class driver 702, a disk port driver 703, and a disk miniport driver 704. The filter driver 802 of the present invention. ) Is inserted between the file system driver 701 and the disk class driver 702 to control hard disk related input and output.

Thereafter, when the user selects an operation of reading or writing data while working, the I / O occurs in the operating system (S901).

Then, the I / O request analyzer 203 extracts the start sector and the length of the I / O request, prepares the I / O request containing the call, and calls the interrupt. In addition, the I / O request analysis unit 203 analyzes the I / O request from the operating system to find out the required I / O start sector number and the number of sectors to perform I / O (S902).

If the job selected by the user is a read job (S903), the central processing unit 12 determines whether the corresponding data is mapped by the mapping manager (S904).

If the data is mapped to the mapping table, the mapping manager controls the microcontroller 16 to read the data from the mapped individual user area and display the data on the display 11 (S905 and S906).

If the data is not mapped, the mapping manager controls the microcontroller 16 to read data directly from the corresponding area and display the data on the display 11 (S906).

On the other hand, if the job selected by the user is a write job, the central processing unit 12 determines whether the corresponding data is mapped by the mapping manager (S907).

If the corresponding data is mapped to the mapping table, the mapping manager refers to the mapping table, the I / O start sector number, the number of sectors to perform the I / O, and controls the microcontroller 16 to designate the location to write the data. The data is converted to the corresponding location in the area and written to the hard disk (S909 and S910).

If the data is not mapped, the mapping management unit 204 requests allocation to the allocation management unit 206.

Then, the allocation manager 206 allocates the free space in the user area, records it in the mapping table, and informs the mapping manager 204 of this in step S908.

Next, the mapping management unit 204 refers to the mapping table, and controls the microcontroller 16 to convert a position to write data into a corresponding position in the user area to write to the hard disk (S909 and S910).

Thereafter, when the computer is turned on by another user and used by an ID and password input procedure, the computer reads and writes to the user's area in the same manner as the above process.

The embodiments of the present invention described above can be variously modified, and can be applied to various electronic devices such as a PC, a workstation, as well as a computer.

As described above, in the embodiment of the present invention, the following effects can be obtained by providing independent virtual disks to a plurality of users.

First, even if a user erases files or deletes all information on the disk, this behavior affects only that user's virtual disk, and other users do not affect the virtual disk. Thus, the user can prevent the loss of his or her program or data by mistake or intention of other users.

Secondly, even if one's mistake does not affect other users, various attempts and exercises can be made. Therefore, it is possible to enhance the learning effect of the computer and to use various functions of the computer with confidence.

Third, the disk space can be efficiently managed by separating the disk area into a shared area and an individual user area.

Claims (8)

In the (correction) computer system, Hard disk drive for storing information, When the power is applied, it performs a post process, performs a user confirmation procedure, sets a disk allocation area of the user, and controls the user to read or store data in the user area when the user selects read / write. It includes a control unit, The control unit, An I / O request interception unit for intercepting a disk-related interrupt; A user selector for checking which user has permission to use; An I / O request analysis unit for analyzing the I / O request from the operating system to find out the required I / O starting sector number and the number of sectors to perform I / O; A mapping management unit for controlling read and write operations to individual areas of a corresponding user by referring to the I / O starting sector number and the number of sectors to perform I / O and an internal mapping table; An I / O execution unit for performing input / output under the control of the mapping manager; If the I / O request from the operating system is a write request to the unallocated shared area, the computer system including an allocation management unit for securing and mapping a certain space to the empty space of the individual user area. delete (Correction) The method according to claim 1, The mapping manager. In case of write operation, if the corresponding data is mapped to the mapping table, the mapping management unit refers to the mapping table to convert the location to write the data to the corresponding location in the user area so that the hard disk drive can be written. And requesting allocation to the allocation management unit. (Correction) The method according to claim 1, The mapping manager. In case of the read operation, if the data is mapped to the mapping table, the mapping manager converts the position to read the data to the corresponding position in the user area by reading the mapping table and reads it from the hard disk drive. If not, reading data directly from the area. In the (correction) computer system, Hard disk drive for storing information, An option ROM card incorporating a control program for allocating the disk after the post process; When the power is applied, the post process is performed, and through the user confirmation procedure according to the control program of the option ROM card, the disk allocation area of the user is set, and when the user selects read / write, the area of the user Includes a central processing unit that controls reading or storing data from The control program, An I / O request interception unit for intercepting a disk-related interrupt; A user selector for checking which user has permission to use; An I / O request analysis unit for analyzing the I / O request from the operating system to find out the required I / O starting sector number and the number of sectors to perform I / O; A mapping management unit for controlling read and write operations to individual areas of a corresponding user by referring to the I / O starting sector number and the number of sectors to perform I / O and an internal mapping table; An I / O execution unit for performing input / output under the control of the mapping manager; If the I / O request from the operating system is a write request to the unallocated shared area, the computer system including an allocation management unit for securing and mapping a certain space to the empty space of the individual user area. (Correct) performing a post process when the power is applied, and initializing the option ROM card through a disk related interrupt of the BIOS; Setting a disk allocation area of the corresponding user through a confirmation process of the user and performing a booting process; If the user selects read / write, the step includes mapping the data to the user's area to read or store the data. If the user selects write, if the data is mapped to the mapping table, refer to the mapping table to convert the location to write the data to the corresponding location in the user area so that the hard disk drive can be written. If the data is not mapped, And mapping the writing position of the data to an individual user area by allocating the data and writing the data to the hard disk drive with reference to the mapped position. delete The method of claim 6, If the user chooses to read. If the data is mapped to the mapping table, refer to the mapping table to convert the location to read the data to the corresponding location in the user area so that it can be read from the hard disk drive. If the data is not mapped, the data can be read directly from the area. A control method of a computer system, characterized in that reading.