Tape positioning using reverse boundary capture: tape drive syst

Details Tape positioning using reverse boundary capture: tape drive syst Tape positioning using reverse boundary capture: tape drive syst

1986-11-21

1989-04-11

Wolff, John H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 723, 360 741, G11B 1548

Patent

active

048211290

ABSTRACT:
A tape driven system includes means for capturing data block boundaries while moving in reverse, as well as in the forward direction. Thus, block boundaries can be captured following each reversal of tape direction to cancel prior errors induced during tape reversals provided these errors are within tolerance. In a hitch operation, the rear boundary of a data block is recaptured as a reference position for the next forward operation. In a backspace operation, the front boundary of a data block is captured while the tape is moving in the reverse direction to provide a reference point for the next operation.

REFERENCES:
patent: 3938105 (1976-02-01), Lechner
patent: 4542427 (1985-09-01), Nagai
patent: 4551774 (1985-11-01), Sakaguchi et al.
patent: 4680652 (1987-07-01), Ito

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