JPS62242257A - Backup system for system - Google Patents

Abstract

PURPOSE:To make the rise of the entire of a system faster by storing required information for activating the system on a storage means during the disconnection of a power source, selecting the storage means during the activation of the system and activating the system. CONSTITUTION:During the disconnection of the power source, the sector of a file management table 5, a system program file, an automatic performing file or program during the closing of the power source or the like are previously stored in a power source backup memory 6, thereafter, the power source is disconnected. During the disconnection of the power source, the contents of the power source backup memory 6 is preserved by a battery power source. When the power source is applied, the table 5 is referred from a buffer part 4 previously stored in the power source backup memory 6 before a hard disk 1 is brought into a ready state, data is read, and the activation of the system is started.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a backup method for a system using an external storage device.

[Prior Art] Demand for small hard disks used as external storage devices for personal computers and the like has been increasing in recent years due to their superiority in access speed and storage capacity. However, due to its structure, conventional hard disks have the disadvantage that it takes several tens of seconds from power-on until the disk becomes accessible. This may not be a particular problem when used in a normal personal computer or word processor, but when used in a communication terminal and the power is turned on for the first time upon reception, it takes several tens of seconds to complete the system startup. This was a big problem from the standpoint of communication costs and communication regulations. This applies not only to systems that simply use hard disks, but also to systems that use other external storage devices that are slow to start up.

[Problems to be Solved by the Invention] The present invention provides a system backup method that shortens the time required to start up, which is a drawback of the conventional system using an external storage device, and speeds up the startup of the entire system. .

[Means for Solving the Problem] As a means for solving this problem, the system backup method of the present invention stores predetermined information when the system is powered off, and stores the stored information when the power is turned off. The storage device is provided with a write-free storage device that is retained for a long period of time, and a selection device that selects and uses the storage device at the time of system startup.

[Operation] In such a configuration, the system backup method of the present invention stores information necessary for starting the system in the storage means when the power is turned off, and when starting the system, selects the storage means and starts the system.

[Examples] Examples of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a diagram showing the configuration of the system of this embodiment.

1 is a hard disk, 2 is a hard disk control circuit, 3
6 is a selection circuit, and 6 is a power backup memory, which is used as a cache memory for data processing during normal system operation. 4 is a buffer section, and 5 is a sector management table section (hereinafter referred to as table section). Control of the system is performed by a data bus 10 that exchanges data between the CPU 7, ROM 8, RAM 9, and other parts.

A distinctive feature of this system is that any sector can be stored in the power backup memory 6 during power-off processing. This function is used to store in advance sectors of the file management table, system program files, automatic execution files and programs when the power is turned on, and then the power is turned off. While the power is turned off, the contents of the power backup memory 6 are saved by a battery power source (not shown). When the power is turned on, data is read from the buffer section 4 previously stored in the power backup memory 6 by referring to the table section 5 before the bird disk 1 becomes ready, and the system starts to boot. .

Note that the power backup memory 6 may be included in the control section of the system, or it may be incorporated into a hard disk device to reduce the load on the system.

Next, the operation of the selection circuit 3 etc. in FIG. 1 is performed by the CPU 7.
FIG. 2 shows a flowchart of the system program when the boot program stored in M8 is used.

First, when the system is started, it is checked in step S21 whether the system is started after the power is turned on, and if it is not started after the power is turned on, the process jumps to step S25 and the hard disk 1 is accessed immediately.

If the startup is after the power is turned on, the table unit 5 is referred to from the backup memory 6 in step 322 and the buffer unit 4 is
The data is read in, and startup processing is performed in step S23. After waiting for the hard disk 1 to become ready in step S24, the hard disk 1 is accessed in step S25, and the startup process is ended.

After the system is started, the power backup memory 6 is used for data processing as a standby memory or the like when reading and writing from the hard disk 1.

When the system is stopped, if it is determined in step S26 that the system is to be stopped, the process goes to step S27, where programs and data necessary for starting the system are written in the backup memory 6, and the system is stopped. Step 328 is a process other than stopping.

As described above, according to this embodiment, instead of starting booting from the hard disk after waiting several tens of seconds until the hard disk becomes ready, as in the conventional case, the power is turned on and the hard disk motor starts rotating. Since it starts at the same time, it is effective for systems such as communication terminals that require immediate response after the power is turned off.

Although this embodiment has been described with respect to a hard disk, the same applies to other external storage devices that take time to start up.

[Effects of the Invention] As described above, the present invention provides a system backup method that shortens the time it takes to start up, which is a major drawback of conventional systems using external storage devices, and speeds up the start-up of the entire system. can be provided. Furthermore, backup is now possible in the event of a momentary power outage.

[Brief explanation of drawings]

Figure 1 is a system configuration diagram of the first embodiment, and Figure 2 is a system configuration diagram of the second embodiment.
2 is a flowchart of the startup program of the embodiment. In the figure, 1... hard disk, 2... hard disk control circuit, 3... selection circuit, 4... buffer unit,
5...Table part, 6...Power backup memory, 7...CPU, 8...ROM, 9...RAM,
10...Data bus.

Claims (2)

[Claims] (1) In a system using an external storage device, a writable storage means that stores predetermined information when the system is powered off and retains the stored information while the power is turned off, and a storage means that selects the storage means when the system starts up. 1. A system backup method, characterized in that the system is started by the storage means, and the system is started by the storage means. (2) The storage means retains the stored information using the power supply of the capacitor while the power is cut off.
Backup method for the system described in section.