Virtual addressing of optical storage media as magnetic tape equivalents
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United States of America Patent
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-
Oct 3, 1995
Issued Date -
N/A
app pub date -
Jun 20, 1994
filing date -
Apr 5, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical disk storage system emulates a magnetic tape subsystem by virtual addressing of data recorded on write once optical disk media having a predetermined group of available sectors for rewriting a disk ID, a predetermined plurality of bands of available sectors for rewriting a virtual tape directory to virtual tape VSNs, and, available sectors for rewriting virtual tape maps and rewriting user records, the tape maps have data portions for simulating tape marks and interblock gap and for addressing blocks of data within the virtual tapes, the virtual tape directory has pointers for pointing to tape maps, and the system rewrites the tape directory, tape maps and user records so as to function as a rewritable magnetic tape.
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