Method and apparatus for enabling fast access to a logical block

Details Method and apparatus for enabling fast access to a logical block Method and apparatus for enabling fast access to a logical block

1993-05-06

1999-11-09

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 49, G11B 1518

Patent

active

059825723

ABSTRACT:
A method and apparatus is disclosed for fast access to any logical block on a media not containing logical block addressing. Categorizing marks such as filemarks or setmarks are provided on the tape medium at various points along the medium. The medium is divided up into a plurality of physical blocks. To permit fast access to a logical block on the tape, a connection table in the form of a block map is provided which establishes a relationship between logical blocks and the tapemarks, and defines physical positions of at least some of the tapemarks.

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