Writing synchronized data to magnetic tape

Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data in specific format

Reexamination Certificate

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Details

C710S006000, C710S052000, C710S055000

Reexamination Certificate

active

06856479

ABSTRACT:
Synchronized data is written to magnetic tape while reducing the number of backhitches. A controller detects a pattern of synchronizing events for received data records to be written to tape; writes each transaction of data records to the magnetic tape; accumulates the synchronized transactions in a buffer; and subsequently recursively writes the accumulated transactions of data records from the buffer to the magnetic tape in a sequence. A single backhitch may be employed to place the recursively written accumulated data records following the preceding data, maximizing performance and capacity.

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“Method for Transferring Large Amounts of Data to Streaming Tapes”, IBM Technical Disclosure Bulletin, vol. 31, No. 6, 11/88, pp. 341-342.
“Variable IBG Mode for Tape Drive”, IBM Technical Disclosure Bulletin, vo. 25, No. 6, Nov. 1982, p. 2880.

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