JPS63166068A - Controller for floppy disk drive device - Google Patents

Abstract

PURPOSE:To surely protect important information, by providing a read/write number of times counter at every recording track, and informing the service life of a floppy disk automatically when the number of times of read/write arrives at a marginal number of times at a certain recording track. CONSTITUTION:The read/write number of times counter 4 which counts the number of times of read/write execution is provided at every recording track 3 of the floppy disk 2 on which a bit of information is read and written by a magnetic head 1, and the counted value of the read/write number of times counter 4 is written by a read/write number of times preserving means 5 reacting according to the switch operation of a write switch, and reacting according to the above, the number of times of the read/write stored in the floppy disk 2 is read out by a read/write number of times setting means 6, and it is set at the read/write number of times counter 4 as an initial value. When the counted value counts the marginal number of times, the service life of the floppy disk is informed by a floppy disk service life informing means 7. In such a way, it is possible to surely protect the important information written on and read out from the floppy disk.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a floppy disk drive device, and particularly to a floppy disk drive device that automatically notifies the life of a floppy disk used in this device and the cleaning period of a magnetic head. The present invention relates to a control device for a floppy disk drive device.

[Prior Art] For example, in a floppy disk drive (FDD) that uses a flexible floppy disk (FDK) as a magnetic recording medium, a clamp mechanism is attached to the spindle motor shaft, and the disk is inserted from the disk insertion slot. The floppy disk is fixed to the shaft of the spindle motor using this clamp mechanism, and the spindle motor is rotated at a predetermined speed.

The magnetic head mounted on the carriage is moved in the radial direction of the floppy disk using a stepping motor, and information is written to and read from each recording track formed on the recording surface of the floppy disk. There is.

[Problems to be Solved by the Invention] However, the floppy disk drive device described above which automatically reads information from an externally inserted floppy disk has the following problems. . In other words, information is written to and read from a floppy disk as an information storage medium many times, but if the number of self-read operations exceeds a certain allowable limit, write errors or read errors may occur due to wear of the recording surface, etc. The probability of doing so is skyrocketing. Therefore, floppy disks are generally considered consumables. Therefore, if important information is to be recorded, it is necessary to replace the old floppy disk with a new one before the end of its life.

However, just by looking at the appearance of the floppy disk enclosed in the jacket, it is impossible to estimate the remaining lifespan of the floppy disk. Of course, every time a floppy disk is set in a floppy disk drive, the operator could record the number of writes/reads on the jacket, etc., but this would not only increase the burden on the operator, but also record the number of writes/reads. There are concerns about forgetting.

Furthermore, depending on the type of information, writing and reading may be performed concentrated on a specific recording track of the floppy disk. In this case, it is considered that only that recording track wears out early. Therefore, if the operator counts the number of writes and reads and records it on a jacket or the like, there is a problem in that it is not possible to accurately predict the lifespan of the floppy disk.

The present invention provides a floppy disk drive that can reliably protect important information by providing a read/write counter for each recording track and automatically notifying the end of the floppy disk's life when the limit number of times is reached for one recording track. The purpose is to provide a control device for the device.

[Means for Solving the Problems] In the control of the floppy disk drive VA device of the present invention, as shown in FIG. A read/write counter 4 is provided for each track 3 to count the number of times information is written to and read from the recording track 3, and a write switch is operated before the Fronby disk 2 is ejected from the floppy disk drive device. In response to this, the read/write count storage means 5 stores the read/write count counter 4.
The count value is written to the corresponding floppy disk 2, and in response to the insertion operation of the floppy disk 2 into the floppy disk drive device, the read/write count setting means 6 reads the read/write count stored in the floppy disk 2. Read/write number counter 41. : Set as the initial value. When the count value of the read/write number counter 4 reaches the limit number of times, the floppy disk life notification means 7 notifies the floppy disk life.

Further, in another invention, in addition to the above-mentioned means, a head use counter 8 is provided that counts the number of times information is written and read by the magnetic head 1, and when the count value of the head use counter 8 reaches the allowable number of uses, the head is cleaned. A notification means 9 notifies the magnetic head cleaning instruction.

[Operation J Floppy disk drive 1i configured in this way
fff's ill 101 If you insert the floppy disk into the disk drive device,
The number of read/writes recorded on the floppy disk for each recording track of the floppy disk is read out and set as an initial value in a read/write number counter. When information is written to or read from the corresponding floppy disk, the number of times the information is written or read is accumulated in the read/write counter. Then, when the write switch is operated while the floppy disk is removed from the floppy disk drive device, the count value of the read/write number counter is newly written to the corresponding floppy disk. Therefore, on the floppy disk, the number of times of writing/reading performed for each recording track is recorded on the floppy disk. Then, when the corresponding floppy disk is inserted into the floppy disk drive device and the count value of the read/write number counter reaches the limit number of times while reading the information in a blur manner, the floppy disk life is notified.

Another advantage of the present invention is that, in addition to the above-mentioned effects, the number of times the magnetic head writes and reads across all floppy disks is accumulated in a head usage counter. Then, when this count value reaches the allowable number of uses, a magnetic bed cleaning instruction is announced.

〔Example〕 An embodiment of the present invention will be described below with reference to the drawings.

Figure 2 shows the case where the control unit of the floppy disk drive device of the embodiment is applied to a file control unit (FC, file controller) of a POS (point of sale) system in a large-scale retail store such as a department store or a supermarket. FIG. 1 is a block configuration diagram showing the entire POS system.

In this POS system, a plurality of electronic cash registers 13 arranged at each sales floor are connected via a transmission line 12 to one file control unit 11 installed in, for example, an office of a store.

Each electronic cash register 13 registers sales data such as the number of items sold at each sales floor and the sales amount, and transmits it to the file control unit 11 via the transmission path 12.
It has 41 functions of exchanging payment for sold products with customers. centre? The file IIIJwJ unit 11 has a function of cumulatively storing each sales data transmitted from each electronic cash register 13 in a storage unit such as a RAM or a floppy disk drive device, for example, for each product.

In this file control unit 11, as shown in the figure, CPtJ (central processing@location) executes various PI4 calculation processes.
14 is a ROM 16.1 that stores various control programs via a pass line 15. Each electronic cash register 13
RAM 17 for storing sales data etc. sent from the RAM 17. 5DLC (Synchronous Data Link Controller) for data transmission with each electronic cash register 13, floppy disk drive device (FFD) for automatically reading information from the floppy disk 18
)19 etc. In addition, the CPL114 has RAM1
A DMA controller 20 for direct data transmission between the floppy disk drive device 19 and the floppy disk drive device 19 is connected thereto. Further, warning lamps 21a, 21b, and 21c made of 3I light emitting diodes (LEDs), a write switch 22, and a pusher 23 are connected to the pass line 15 via an input/output port (not shown).

The warning lamp (LED1) 21a is used to notify of the occurrence of an error during writing/reading or when an erroneous operation is performed, and the warning lamp (LED2) 21b is used to notify the user that the life of the floating disk 18 has expired. This is a warning lamp (LE) that notifies you that the
D3) 21C is for notifying an instruction to clean the magnetic head.

Further, in the RAM 17, a product file (JAN file) is formed that stores product names, unit prices, number of sales items, sales amounts, etc. for products sold at all sales floors, by product code. Furthermore, within this RAM 17, a third
As shown in the figure, a USB disk drive device 19
Floppy disk 1 with a magnetic head inserted in
8, a head usage counter R1 counts the number of times information is read and written to the floppy disk inserted into the disk insertion slot, and a head usage counter R1 counts the number of times information is written and read from the floppy disk inserted into the disk insertion slot, for each recording track of the floppy disk 18. A read/write count counter R2 for counting, an error log memory R3 for sequentially storing an error log indicating the type of error when an error occurs when executing an I-in read;
Area R4 for storing an error protection pointer EP that specifies the write address when writing a new error log to the error log memory R3, an inserted floppy disk 18
FDK &! that stores the identification number ID of Different number area R5,
The counter R2, the memory R3, and the flag f that stores an initial state flag indicating that all the memory contents of the area R4 have been written to the inserted floppy disk 18.
An R region R6 is formed.

Furthermore, each floppy disk 18 inserted into the floppy disk drive device 19 has a data storage area R7 for storing various data (information) inputted via the DMA controller 20, as shown in FIG. In addition, the FDK identification number area R that stores its own identification number ID
8. The read/write count memory R9 stores the transmitted read/write count for each recording track of the RAM 17, and the error log memory R10゜fIA area R11 has the same configuration as the error log memory R3 and area R4 of the RAM 17. It is formed.

When the CPU 14 receives a detection signal from the floppy disk drive device 19 for detecting the operation of inserting or ejecting the floppy disk 18 into the disk insertion slot, and further inputs a write switch operation, an I-in/read command, etc., the CPU 14 executes the flowchart shown in FIG. The program is configured to run. That is, when the flowchart is started and insertion of the floppy disk 18 into the floppy disk drive device 19 is detected at P1, the state of the flag area R6 of the RAM 17 is checked at P2. If the initial state flag is set to 1, the floppy disk 18 is loaded via the floppy disk drive device 19 in P3.
DK identification number @Identification number IQ of area R8, read/write count 48 times CN of each read/write count memory R9, each error log of error log memory R10, and error log write pointer EP of area R11 are read. Then, the identification number ID, read/write count CN, error log, and I-included pointer EP read in P4 are initialized to the FDK identification number area R5, read/write count counter R2, error log memory R3, and area R4 of the RAM 17. , or store. Thereafter, the initial state flag in the flag area R6 is reset to O.

Furthermore, if the initial state flag of the RAM 17 has been cleared to 0 at P2, it is determined that the previous floppy disk 18 was removed without operating the write switch 22, and then the floppy disk 18 was inserted again. . Then, the identification number ID is read from the FDK identification number area 1*R8 of the inserted floppy disk 18, and the identification number ID read in P5 is combined with the identification number ID stored in the FDK identification number area R5 of the RAM 17. If they match, the same floppy disk 18 has been reinserted, so the RAM
The read/write count CN for each recording track accumulated in the counter R2 of 17, each error log in the error log memory R3, and the error log write pointer EP in area R4 are read out, and the read/write count memory of the floppy disk 18 is read out. R9, error log memory R10, and area R11. After that, the initial state flag of RAM17 is set to 1.
Set to .

If the identification numbers ID do not match at P5, it is determined that the previous floppy disk 18 was removed without operating the write switch 22 and a different floppy disk 18 was inserted, and a warning lamp indicating an incorrect operation is displayed. 21a is turned on and the buzzer 23 is made to sound for a certain period of time.

In addition, when it becomes necessary to write one piece of data to the floppy disk 18 or read one piece of data from the floppy disk 18 at P6, a specified data is sent by the magnetic head via the floppy disk drive device 19. Write and read data (information) to and from the recording track.

Then, when it is confirmed in P7 that no error has occurred during the execution of readout, the read/write count CN of the corresponding recording track in the read/write count counter R2 of the RAM 17 is increased by 1 in P9. . Note that when an error occurs at P7, an error log indicating the type of error that occurred at P8 is stored in the position specified by the write pointer EP in area R4 in error log memory R3 of the RAM 17.

Next, when it is confirmed in Plo that the increased read/write count CN has not reached the predetermined limit count CN wax, 1 is added to the count 618c of the head usage counter R1 in the RAM 17 in P12. to add. In addition, if the read/write number CN after increasing in PIO reaches the limit number CN laX, it is determined that this floppy disk 18 has reached the end of its life, and the warning lamp 21b is turned on.
lights up to notify the operator of the floppy disk lifespan.

Next, at P13, the count l of the head usage counter R1 after incrementing! HC is predetermined allowable number of uses 1-ICm
After confirming that it has not reached ax, the process of writing and reading one piece of data (information) to and from the floppy disk 18 is completed. In addition, the count value H after increasing at P13
When C reaches the allowable number of uses HCwax, it is determined that the magnetic head needs to be cleaned, and the warning lamp 21C is turned on to notify the operator of a head cleaning instruction.

Further, when the write switch 22 is operated at P15, it is determined that the write switch 22 was operated before the floppy disk 18 inserted into the floppy disk drive device 19 was removed. Then, at P2O, the read/write count CN for each recording track of the read/write count counter R2 of the RAM 17, the error log write pointer EP of the area R4, and each error log of the error log memory R3 are read out. The read/write count memory R9, 111 of the floppy disk 18
1R11j9J: Hill 5-0 Kume T-! Write each to JR10. When the above processing is completed, the initial state flag of the RAM 17 is set to 1.

In addition, when the floppy disk 18 is removed from the floppy disk drive device 19 at P17, the PI3
Confirm that the initial state flag of the RAM 17 is set to 1. Note that the initial state flag is 0 in PI3.
If the floppy disk 18 that has been removed remains unlocked, the read handle for the removed floppy disk 18 is turned ON 48 times, the error log, etc. remains in the RAM 17, and it is determined that it has not been written to this floppy disk 18, and the operation error warning lamp is turned on. 21a and sounds the buzzer 23 for a certain period of time to notify the operator of an erroneous operation.

What is the function of the WJ system R for the floppy disk drive device configured in this way? When the floppy disk 18 is inserted into the floppy disk drive device [19], the read/write count CN for each recording track and each error log recorded on the inserted floppy disk 18 are read out. and is set in the read/write number counter R2 and error log memory R3 of the RAM 17. Each time data (information) is written to or read from the Otsubi disk 18, the read/write count ON is updated, and if a write/read error occurs, the error log is also stored. If the write switch 22 is operated just before taking out the floppy disk 18 from the disk drive device 19, the read/write count updated in the RAM 17 is turned on and each error log is written to the corresponding floppy disk 18 again. be included. Then, during the write/read operation, the number of read/writes CN becomes the limit number CN wax
When it reaches this point, the warning lamp 21b lights up.

Therefore, the operator must
It is possible to accurately determine when the product has reached the end of its service life.

As a result, data (information) written and read can be reliably protected.

In addition, the number of reads/writes is counted for each recording track, and the end of the floppy disk's life is announced when one count value CN of each count value (75 in the embodiment) reaches the limit number of times. Therefore, even if intensive reading is performed on a part of the recording track, the lifespan is determined by the number of reads/writes to that part. As a result, data can be protected more reliably.

In addition, the number of times the magnetic bet is written and read is also counted, and the count value HC is the allowable number of uses CHll1ax
When the warning lamp 21C is turned on, the warning lamp 21C lights up, so the operator only has to carry out head cleaning the next time the floppy disk 18 is removed. Therefore, it is possible to always operate the magnetic bet in the best condition.

Further, in this embodiment, if the floppy disk 18 is removed without operating the write switch 22, an error occurs, the warning lamp 21a lights up and the buzzer 23 sounds. In this case, reinserting the same floppy disk 18 is the same as operating the write switch 22. That is, the error state is canceled and each data in the RAM 17 is written to the floppy disk 18. Therefore, the number of reads/writes can be counted more accurately.

It should be noted that the present invention is not limited to the embodiments described above, and can be applied to other data processing devices besides the file control section 11 of a POS system.

[Effects of the Invention] As explained above, according to the present invention, a read/write number counter is provided for each recording track, and when the limit number of times in one recording track is reached, an automatic notification of the 70-bit disk life is made. I have to. Therefore, important information written to and read from the floppy disk can be reliably protected.

In addition, since you can accurately determine when to clean the magnetic head, you can always maintain the magnetic head in the best condition.
The effect of protecting the above-mentioned important information can be further improved.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the present invention, Figs. 2 to 5 show a control device for a floppy disk drive device according to an embodiment of the present invention, and Fig. 2 shows a POS to which this embodiment is applied. FIG. 3 is a block diagram showing the entire system, FIG. 3 is a diagram showing the main memory of the storage section (RAM), FIG. 4 is a diagram showing each memory in the floppy disk, and FIG. 5 is a flowchart showing the operation. 11... File control unit, 13... Electronic cash register, 14... CPU, 17... RAM, 18
... Floppy disk, 19... Floppy disk drive device, 21a, 21b, 21c... Warning lamp, 22... Write switch, 23... Buzzer,
R1... Head use counter, R2... Read/write number counter, R3, R10... Error log memory, R5, R8... FDK identification number @ area, R9...
Read/write count memory. Applicant's agent Patent attorney Shikihiko Suzutsuta Figure 3 Figure 4

Claims (2)

[Claims] (1) In a control device for a floppy disk drive device in which a magnetic head that is controlled to move in the radial direction of a rotationally driven floppy disk writes and reads information to and from each recording track of the floppy disk, the floppy disk a read/write counter that counts the number of times information is written to and read from each recording track for each recording track; and a read/write counter that counts the number of times information is written to and read from the recording track; read/write count storage means for writing the count value of the read/write count counter into the corresponding floppy disk; read/write number setting means for reading the number of writes and setting it as an initial value in the read/write number counter; and floppy disk life notification means for notifying the floppy disk life when the count value of the read/write number counter reaches a limit number of times. A control device for a floppy disk drive device, comprising: (2) In a control device for a floppy disk drive device in which a magnetic head that is controlled to move in the radial direction of a rotationally driven floppy disk writes and reads information to and from each recording track of the floppy disk, the floppy disk a read/write counter that counts the number of times information is written to and read from each recording track for each recording track; and a read/write counter that counts the number of times information is written to and read from the recording track; read/write count storage means for writing the count value of the read/write count counter into the corresponding floppy disk; read/write number setting means for reading the number of writes and setting it as an initial value in the read/write number counter; and floppy disk life notification means for notifying the floppy disk life when the count value of the read/write number counter reaches a limit number of times. , comprising: a head usage counter that counts the number of times information is written and read by the magnetic head; and head cleaning notification means that notifies a magnetic head cleaning instruction when the count value of the head usage counter reaches the allowable number of uses. A control device for a floppy disk drive device.