System and method for mapping directly accessible magnetic DASD storage to fixed block optical storage
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United States of America Patent
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Nov 7, 1995
Issued Date -
N/A
app pub date -
Jul 15, 1994
filing date -
Apr 17, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A computer installation is programmed for storing data in a magnetic disk DASD (direct access storage device) in the form of a track number identified by DASD cylinder number (CC) and DASD head number (HH). A re-writable, multi-disk optical storage which stores information in a fixed-block architecture including a sequence of sectors having the form of spirals on optical disk surfaces is enabled to emulate magnetic DASD by calculation-based conversion of storage references to magnetic DASD tracks to fixed-block optical sectors.
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