Method and system for reading data from and writing data to a jukebox using a cache
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United States of America Patent
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Dec 1, 1998
Grant Date -
N/A
app pub date -
Nov 13, 1995
filing date -
Nov 13, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and system for improving the transfer performance of a jukebox containing multiple media, either single-sided or double-sided, which, although independent, act as a single contiguous drive or volume. By caching writes in one embodiment and caching reads and writes in another embodiment, performance increases by preventing unnecessary disc swapping between the drive or drives of the jukebox. In operation, writes to the media currently in the drive are written through to the media and writes to all other media are cached while the cache does not have a predetermined utilization. When the cache has the predetermined utilization, a different media is placed in the drive and any cached or pending writes for the newly inserted media are sent to the newly inserted media and any corresponding cache entries are cleared.
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