Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1991-05-28
1993-12-07
Sikes, William L.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7712, 360 7802, 360 25, 360134, H04N 5783
Patent
active
052688020
ABSTRACT:
A magnetic tape drive has firmware which has been modified so that the drive will read both standard format tapes and non-standard format tapes. Non-standard tapes are detected by an absence of reference bursts in the load zone of the tape. The head is moved to successive tracks toward the edge of the tape until no data is read. This identifies the track near the edge of the tape. Then, the head is preset to a track which is a known distance from the edge of the tape. Reading of non-standard tapes is accomplished by disabling the index pulse generator in the intervals between data segments. The performance of a SKIP COMMAND is made possible by counting the transitions of data to no data during the intervals between data segments. The identification of different types of non-standard formats is made by determining the length of the data segments.
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"Common Command Set Interface Specification For Flexible Disk Controller Based Minicartridge Tape Drives", QIC-117, Revision B, Dec. 6, 1989.
Iomega Corporation
Ouellette Scott A.
Sikes William L.
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