SU957261A1 - Method of coded data checking and recording to magnetic tape - Google Patents

Description

one

The invention relates to a device, namely, to methods for recording and controlling information on a magnetic tape in memory digital computers and in systems for collecting and processing experimental data.

There are known za methods for recording and monitoring information on a magnetic tape. The first method: a control readout is performed with the same heads as the record, with the tape rewinding to the beginning. The second method: control reading is performed by a special block of reading heads, which stands behind the block of recording heads in the course of tape movement.

Both in the first and in the second method, control is carried out in the zone, i.e. as a whole, the array of information from B to lines is checked, and if an error is detected, the entire zone is rewritten.

A modification of the second method is known, in which, due to the redundancy of information, it is possible to detect the exact location of the error, however, in this case it is also necessary to rewrite the entire zone in which error 1} and 2 was detected.

In all the described methods, the reverse is required to correct the error.

ten . rewinding the tape and its re-run under the blocks of write-read heads. Moreover, this process in the real device can be repeated several times, which leads to the wear of the magnetic tape, thereby forcing the process of increasing the number of errors.

The closest in technical essence to the present invention is the recording method and. control code

20 information on a magnetic tape, which includes recording and control reproduction of information using the effect of scattering of the magnetic field.

Claims (3)

957261 in this method there is no operational control of the recording and there is no real possibility of reliable error correction. The purpose of the invention is to provide in-place operational control and monitored error correction. The goal is achieved by the fact that in the time interval between two adjacent pulses, the recording is carried out with the same head as the recording. The method is based on the appearance of the scattering of a magnetic field in the working recording. The difference is that the reading in the interval between two adjacent recording pulses immediately after the next code pulse is recorded by the same head as the recording, is beneficial because the imprint made by the recording pulse has not yet come out. under the head. In this case, it is not the front but the rear difference in magnetization of the print made that is read. This allows controlled re-recording until a quality print is obtained, and the recording signal itself is used for synchronization. In the method for improving the signal reproduction conditions, recording is conducted on a demagnetized magnetic tape, and only the T2 sections where 1 is recorded are magnetized. This gives you the opportunity to get rid of interference caused by defects in the magnetic tape, where O is recorded. In FIG. 1 shows a block diagram of a device implementing a method; see 2 - time diagram, according to s-с yes operation of the device. The device contains a recording amplifier 1, the input of which is connected to the input of the strobe driver 2, and one of the ends of the winding of the magnetic head 3 is connected to the output of the midpoint of which is grounded, and the other end is connected to the reading amplifier whose output is connected to the input of the switch 5 controlled by the driver 2 gates. FIG. 2 b areas are distinguished: AB transient process in the magnetic head 3 along the leading edge of the recording pulse; BV - reading half winding reaction to write pulse; VG - transient in the magnetic head 3 on the trailing edge of the recording pulse; DG - PDS in the reading half-winding, induced by the rear differential of the magnetization of the produced print. When the next code pulse is applied to the input of the device, the recording amplifier 1 is triggered and the gate driver 2 is started. At the end of the transition process in the head 3, the signal from the reading amplifier C is fed through the switch 5 to the output of the circuit. The use of the method in magnetic tape storage devices removes the need to manufacture a double block of write heads, thereby greatly simplifying the process of manufacturing, commissioning and operating these devices. The invention of the method of recording and monitoring code information on a magnetic tape, including recording and monitoring reproduction of information using a magnetic field scattering effect, characterized in that, in order to enable operative control: controlled and controlled errors, in each symbol of information lead 3 interval of time between two neighbors pulses recording the same hollow as the recording. Sources of information taken BO attention during the examination. . Kagan B.M. and others. Memory devices of large capacity. N., Energie, 1368. 2. Jurmain K. HV / ZbO Programming. M., Mir, 1973. 3.Hogland L. Digital magnetic recording. M, Owls, Radio, 1967, (prototype).