SU832579A1 - Information recording device - Google Patents

Description

one.-

The invention relates to storage devices and can be used in digital information recording devices based on magnetic tape (ML) drives. .

A device for recording information is known, based on the principle of organizing a hierarchical memory, which includes a tape drive and a memory block 11.

A disadvantage of the known information recording device is that it does not provide reliable recording of information when using a tape with defective sections.

Closest to the proposed technical entity is a device for recording information, containing a tape drive, a memory unit, a counter, a valve unit, a first delay element, and a control unit, the address input of the memory unit being connected to the output of the counter, The control inputs of the accumulator, the memory block and the counter are connected to one of the outputs of the control unit, one of the inputs of which is connected to Bd10} from the outputs of the core L2j.

A disadvantage of the known device is that it does not provide2

It reliably records information when used with defective areas.

The purpose of the invention is to improve the reliability of recording information.

The goal is achieved by the fact that in a device for recording information, containing the first delay element, the valve block and the control unit,

0 the first two outputs of which are connected to the first input and through the counter to the second input of the memory unit, and the third output and the first input, respectively, to the first 4th input and the first output of the storage device on a magnetic tape, the error fixing unit, whose inputs are connected are entered: respectively, to the fourth output of the control unit and the second output of the storage unit on the magnetic tape, and the output through the valve unit to the third input, of the memory unit connected in series with the output of the first delay element, the first valve, the second delay element,

5, an error detector, a trigger and a second valve, the output of which is connected to the fourth input of the memory unit, the second input to the input of the first delay element and to the third output accumulated on the magnetic tape, and the toetia to the fourth output of the control unit as well as the register, the first inputs and outputs of which are connected respectively to the fourth output and the second input of the storage device on a magnetic tape, and the second input and output respectively, to the output of the memory unit and the second inputs of the valve unit and the error detector, while the second trigger input connects It is connected to the input of the second delay element and the fifth input of the memory unit, and the first and third inputs of the trigger are connected to the second input and the sixth output of the control unit respectively. The drawing shows the block diagram of the device for recording information. The device contains a magnetic tape drive 1, a register 2, a memory block 3, a counter 4, a control block 5, a first delay b, a valve block 7, an error fixing block 8, a 9O 1 detector, a trigger 10, a second 11 and the first 12 valves, the second 13 delay elements. The input and output of accumulator 1 are connected to register 2, the parallel input of which is connected to the output of memory block 3. The parallel output of the register 2 is connected to the inputs of the valve unit 7 and the error detector 9. The output of the valve unit 7 is connected to the information input of the memory unit 3, whose address input is connected to the output of the counter 4. The control input of the unit 7 is connected to the output of the B block of the error, the input of which is connected to. one of the outputs of the accumulator 1. The other output of the accumulator 1 is connected to the input of the valve 11 and the input of the delay element 6, the output of which is connected to the input of the valve 12, the outputs of the valves are connected to one of the control inputs of the memory block 3. The output of the valve 12 is also connected to the inputs of the trigger 10 and the delay element 13, the output of which is connected to the control input of the error detector 9 Other. The trigger 10 output is connected to the output of the error detector 9, and its output to the first control input of the valve 11. The control inputs of the block 8, the counter 4, the block 3 of the memory of the accumulator .1, the trigger 10, the valve 12, and the second control input of the valve 11 are connected to the outputs of the block 5 of the control. The output of the detector 9 and one of the outputs of the accumulator 1 are connected to the inputs of the control unit 5. The device has the following operating modes. Input of a block of information consisting of a sequence of commands from an external device and writing it into a memory block. Writing a block of information from memory block 3 to a magnetic tape, the recording being made twice. As a result, two identical information blocks were recorded. reproducing the first block of information and recording it in the memory block in the form of a sequence of commands, with erroneously reproduced commands being recorded by writing instead of them into block 3 of memory of a certain code, for example a code consisting of all units. If no errors are detected during the reproduction of the commands of the first block of information, the reproduction process of the information ends. If at least one error is detected during the reproduction of the first block of information, the second block of information is reproduced, and before reproducing the next command from memory block 3, the corresponding command recorded during the reproduction of the first block of information is read. If a code is detected that fixes an error, the next command received from accumulator 1 is written to the memory block 3 at the address. If the code that captures the error was not detected, the next command from memory 1 to memory block 3 is not recorded. After the reproduction of the second block of information in the memory block 3, all the commands that were incorrectly reproduced when the first block of information was entered were restored, except for the commands that contain errors when playing both blocks. The device works as follows. The block of information to be recorded enters the device from the control panel from an external device. In this case, each command from the information block enters the register 2 and is transmitted through the block 7 of the valves to the memory block 3 for storage. After writing the entire block of information into the memory block 3, it is recorded on a tape, for which each command read from memory block 3 is first transmitted to register 2, from which it receives 3 drive 1 in a sequential form. After writing the whole block to a tape the information is recorded again. In this case, both blocks of information are recorded directly on the tape one after the other. When playing the first block of information, it is transmitted in serial form from accumulator 1 to register 2, from which, each time a new command is entered, it goes in parallel form through valve block 7 to memory block 3 for recording at the next address set on counter 4 When an error is detected in the next command reproduced from Langy, block 8 fixes an error, prohibits the transfer of a command from register 2 through block 7 to memory block 3, and sets the code at the output of block 7 that fixes the error. The signal about the end of the input to regis 2 of the next command comes from accumulator 1 through valve 11 to one of the control inputs of memory block 3 and ensures the formation of a recording cycle. Allowing the transmission of signals through the valve 11 is performed by the signal of the control unit 5. Signal transmission through valve 12 is prohibited. After recording the next command in the memory block 3, the control block 5 generates a reset signal, which is fed to the control input of the error fixing block 8. When the playback of the first block of information is finished, the block 5 sets the trigger 10 to match 0, enables the transmission of signals through the gate 12, removes the permission to transmit the signals through the gate 11 and sets the counter 4 to the state corresponding to the address code of the first command. If there is no error during playback of the first block of information from a tape, the second block of information is not reproduced. If at least one error is detected during the reproduction of the first block of information, control block 5 allows the reproduction of the second block of information. The signal from the beginning of the reproduction of the second block of information from accumulator 1 through delay element 6 and vein 12 is fed to one of the control inputs of memory block 3 and ensures the formation of a read cycle. As a result, the command recorded in memory block 3 at the address set on counter 4 is transmitted to register 2. At the same time, the signal from the output of valve 12 through delay element 13 is fed to the input of the error detector E and gates the result of detection of a code that fixes the error. If this code is detected, the signal from the output of the detector 9 switches the trigger 10 to state 1, allowing transmission of signals through valve 11. Then, another command from accumulator 1 is sent to register 2. A signal about the end of command input through valve 11 is fed to the input of unit 3 and provides - formation of a cycle of writing to memory block 3 at the specified address. In the event that detector 9 does not detect a code that detects an error, trigger 10 prohibits the transmission of a signal through valve 11 and writing to memory block 3 is not performed. Then the state of the counter 4 is increased. per unit and a signal about the end of the command input, delayed by the delay element b, sets the trigger 10 to the state O and ensures the formation of a read cycle from memory block 3. The process is repeated until the end of the reproduction of the second block of information. The delay element 6 delays the arrival of the signal at the input of the valve 12 by the time required to perform the write cycle in the memory block 3. The delay element 13 is designed to delay the signal strobe of the state of the detector 9 by the time required to perform a read cycle from memory block 3. The application of the proposed device provides high reliability of recording information when using magnetic tapes with microstructure detectors. The invention The device for recording information containing the first delay element, the valve block and the control unit, the first two outputs of which are connected to the first input and through the counter to the second input of the memory unit, and the third output and the first input. cooTBeTcTBeHHq- to the first input and the first output of the tape drive, which is due to the fact that, in order to increase the reliability of recording information, the device has an error fixing unit, the inputs of which are connected respectively to the fourth output of the control unit and the second output n The tape drive is axial and the output through the valve block is to the third input of the memory unit connected in series with the output of the first delay element first valve, second delay element, error detector, trigger and second valve whose output is connected to the fourth input of the memory block , the second input is with the input of the first delay element and with the third output of the tape accumulators, the third input is the fourth output of the control unit, as well as the register, the first inputs and outputs of which are connected respectively to the fourth output and The second input of the accumulator is on a magnetic tape, and the second input and output, respectively, with the output of the memory unit and the second inputs of the valve unit and the error detector g, the second one. The trigger input is connected to the input of the second delay element and the fifth input of the memory unit, and the first and third inputs of the trigger are respectively connected with the second input and the sixth output of the control unit.

Sources of information taken into account when exploring

1. Zhuravlev Yu. P. and Akinshin Yu.S. System memory design.

TsVM M., Soviet Radio, 1976, p. 48-56.

.2. USSR author's certificate 506910, cl. G 11 C 9/00, 05.04.74 (prototype).

Claims (1)

Claim A device for recording information containing a first delay element, a valve unit and a control unit, the first two outputs of which are connected to the first input and through the counter to the second input of the memory unit, and the third output and the first input .. respectively, to the first input and the first the output of the drive on magnetic tape, revealing that, in order to increase the reliability of recording information, an error fixing unit has been introduced into the device, the inputs of which are connected respectively to the fourth output of the control unit and the second output of the drive to the mag thread tape, and the output through the valve block to the third input of the memory block, connected in series with the output of the first delay element, the first valve, the second delay element, an error detector, a trigger and a second valve, the output of which is connected to the fourth input of the memory block, the second input to the input the first delay element and with the third output of the tape drive, and the third input — with the fourth output of the control unit, as well as a register, the first input and output of which are connected respectively to the fourth output and second input for magnetic tape, and the second input and output, respectively, with the output of the memory block and the second inputs of the valve block and the error detector, while the second. The trigger input is connected to the input of the second delay element and the fifth input of the memory block, and the first and third inputs of the trigger connected respectively with the second input and the sixth output of the control unit.