The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 1998
Filed:
Nov. 13, 1995
Mahesh Chandra Rao, San Jose, CA (US);
Mitsubishi Chemical, America, Inc., San Jose, CA (US);
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.