JPH0423194A - Pos system - Google Patents

Abstract

PURPOSE:To easily take a temporary countermeasure at the time of the occurrence of a fault by providing a means capable of selecting either to use one of two hard disk devices for backing up the other or to use which hard disk device in the case no backup is performed. CONSTITUTION:An HDD selecting means program 2a to select either to use one of two HDDs (hard disk device) 3, 4 for backing up the other or to use which HDD 3, 4 in the case no backup is performed is stored in a memory 2 in addition to programs such as various kinds of data processing programs, etc., and is displayed on the display screen of a display device 5. By designating the key of an item, one of these can be selected. Thus, even if the fault occurs in the HDD, usual business can be carried on according to the selection of a POS user, and if a person having technical knowledge exchanges the HDD and copies all data later on, the fault can be perfectly restored.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a PoS system using a hard disk device (hereinafter simply referred to as 'HDDJ) as an external storage device.

[Prior art]

External storage devices for POS systems have shifted from floppy disks to DDs due to the increase in the amount of data to be processed and faster processing speeds. However, HD
Since storage media cannot be replaced in D, HDD
There is a problem in that if a failure occurs in the HDD, the data stored in the HDD cannot be recovered.

Further, as a backup for the HDD, as shown in FIG. 2, a backup device 4 is provided for the HDD 13. For this backup device 14, there are two methods: backup every fixed period (one day or one week) using an external storage device (for example, a floppy disk device, a cassette I reamer, etc.) whose medium can be replaced, and another method that uses an HDD. Use, HD
There is a method in which the same data is simultaneously written in two HDDs, the D13 and the HDD as the backup device 14, when writing data.

In FIG. 2, 11 is a central processing unit (CPU) that performs data processing, 12 is a memory that stores various data such as programs, 15 is a display device such as a CRT, and 16 is an input device such as a keyboard.

[Problem to be solved by the invention]

However, the method of backing up to an external storage device where the medium can be replaced every fixed period (one day or one week) is
If a failure occurs in the HDD, it is possible to restore it to the state it was in when it was backed up, but there is a problem in that if a failure occurs after a backup, the data cannot be restored.

In addition, if two HDDs are provided and the same data is written to both drives at the same time, it is possible to return to the state immediately before the HDD failure.
Replacing the faulty HDD and removing all data from the non-faulty HDD can only be done by someone with specialized knowledge, and the problem is that the POS cannot be used in the store during that time. there were.

The present invention was developed in view of the above-mentioned points, and in a POS system equipped with two HDDs as external storage devices, the POS user can easily take temporary measures when a failure occurs in the HDD. The purpose of the present invention is to provide a POS system that can be used as is.

[Failure to solve the problem]

In order to solve the above problems, the present invention provides a POS system equipped with an external storage device for storing data, in which a hard disk device is provided as the external storage device, and one of the two hard disk devices is used as a backup for the other. Alternatively, the present invention is characterized by providing a means for selecting which hard disk device to use when backup is not performed.

[Effect]

As mentioned above, since the POS system is provided with a means to select whether to use one of the two hard disk drives as a backup for the other, or which hard disk drive to use if no backup is to be performed, the HDD
Even if a failure occurs in the PO8, normal business operations can be carried out depending on the PO8 user's choice. After that, if someone with specialized knowledge replaces the HDD and copies all the data, the data immediately before the failure and the data from after the failure to the time of replacement will be added, allowing complete recovery.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a diagram showing a schematic structure of a POS system according to the present invention. As shown in the figure, the POS system includes a central processing unit 1, memory 2, two HDDs 3 and 4, and a display device 5.
and an input device 6.

In addition to programs such as various data processing programs, memory 2 has an HDD selection function for selecting whether to use one of the two HDDs 3.4 as a backup for the other, or which HDD 3.4 to use if no backup is to be made. A means program is stored.

In the POS system having the above configuration, when the POS system is started up, a screen as shown in FIG. 4 is displayed on the screen of the display device 5. In other words, "make a 0° backup",
'1. "Use only No. 1 (HDD 3) without backup", "Use only No. 1 (HDD 3) without backup", "Use only No. 2 (HDD 3) without backup
"Use only D4)" is displayed, and the user can select any one of these by specifying the key of the item to be selected. The flow of processing when backup is selected will be described below with reference to FIG. Normal operation is performed using either HDD 3 or HDD 4 as a backup (step 101). If a failure occurs in the HDD in this state (step 102), search for the number of the HDD where the failure has occurred, and if the failure is in HDD 3 (No. 1), a message will be displayed to select HDD 4 (No. 2) without backup. An indication to that effect on the device 5, ie r'2. "Use only No. 2 without backup" is displayed (step 105). In addition, in the case of failure of HDD 4 of No. 2, a message to that effect is displayed on the display device 5 to select HDD 3 of No. 1 without backup, that is, 11. "Use only NO.1 without backup" is displayed (step 106). The user selects the HDD by specifying the specified key according to the above display, and then performs normal operations (step 107). Next, it is determined whether there is work to be done by maintenance personnel (step 108), and if it is, the failed HDD is replaced (step 109), and all data is copied to the replaced HDD (step 110). . Next, select backup, ie, press key rO'' to complete the maintenance work. Said step 10
Steps 1 to 107 are the tasks of the PoS user, and steps 108 to 111 are the tasks of the maintenance personnel. In addition,
N without backup in steps 105 and 107
The selection of the No. 2 HDD or the No. 1 HDD may be performed automatically without any operation by the user.

〔Effect of the invention〕

As described above, according to the present invention, there is provided a means for selecting whether to use one of the two hard disk drives as a backup for the other, or which hard disk drive to use when not backing up the other. Even if a failure occurs in the HDD, the PO3 user can continue with normal business operations at his or her own choice, and if someone with specialized knowledge replaces the HDD and copies all data, the data immediately before the failure can be replaced with the data after the failure. This provides an excellent effect in that the data up to that point is added and a complete recovery is possible.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the schematic configuration of the POS system of the present invention, Fig. 2 is a block diagram showing the schematic configuration of the conventional POS system, and Fig. 3 is the HD of the POS system of the present invention.
FIG. 4, which is a diagram showing the flow of the D selection process, is a diagram showing an example of a display on a display device. In the figure, 1...Central processing unit, 2...Memory, 3
．． 4...HDD, 5...Display device, 6...
input device.

Claims (1)

[Claims] In a POS system equipped with an external storage device for storing data, two hard disk devices are provided as the external storage devices, and one of the two hard disk devices is used as a backup for the other. Alternatively, a POS system is provided with a means for selecting which hard disk device to use when backup is not performed.