Dynamic magnetic information storage or retrieval – Record copying
Patent
1982-11-26
1985-09-10
McElheny, Jr., Donald
Dynamic magnetic information storage or retrieval
Record copying
360 48, 364200, G11B 586
Patent
active
045410194
ABSTRACT:
A tape recording system for connection to a controller of a floppy disk data recording system for recording data in a stream on a recording tape in the same format that data is recorded on a disk by the disk data recording system. A control processor responds to sensing a beginning-of-stream indicator on the tape (a) by causing an initial gap to be erased in the tape stream adjacent the beginning-of-stream indicator and (b) by next providing an initial beginning-of-segment index pulse to the controller. The control processor responds to the combination of (a) a gate signal from the controller provided simultaneously with a formatting signal and (b) the sensing that the length of tape transported past the transducer head following provision of a beginning-of-segment index pulse corresponds to the length of a concentric track on a disk (a) by providing an end-of-segment index pulse to the controller, (b) by next causing an inter-segment gap to be erased in the tape stream and (c) by finally providing another beginning-of-segment index pulse to the controller. The controller responds to the beginning-of-segment index pulse from the control processor by providing to the transducer head a formatting signal for recording a segment that ends when the following end-of-segment index pulse is provided to the controller by the control processor; and the transducer head records the segment in the tape stream between consecutive erased gaps.
REFERENCES:
patent: 3711844 (1973-01-01), Irwin
patent: 3740720 (1973-06-01), Swaney
patent: 4321632 (1982-03-01), Leis et al.
patent: 4375655 (1983-03-01), Korth et al.
patent: 4377825 (1983-03-01), Kasubuchi et al.
patent: 4380047 (1983-04-01), Eisenhard et al.
Navy TDB vol. 4, No. 8, "Cartridge Tape Formatter and Interface", Boland, Aug. 1979.
Cipher Data Products, Inc.
Garland Steven R.
McElheny Jr. Donald
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