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:
Sep. 21, 2004
Filed:
Mar. 28, 2002
Peter Kamvysselis, Boston, MA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
This invention is a system and method for improving performance of a backup operation of data from a data storage system to a media library. In response to a computer system request to backup a slot or track of data, a data engine in communication with the system and a data storage system selectively reads the requested data. Such data engine reads may occur concurrent to host access for I/O operations by employing a protection scheme, e.g. a protection bit. Simultaneously, different backup sessions may read the same track of data that has been read by the data engine. The data slot or track remains in cache memory of the data storage system until all protection bits are reset. A requested slot or track may be moved to a sidefile stored in the cache memory if a host requested to write to it while protection bits are still set and then sent to the Data engine for transfer to a media library.