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. 13, 2005
Filed:
May. 08, 2002
Gary Lee Thunquest, Berthoud, CO (US);
Lawrence E. Rupp, Loveland, CO (US);
Gary Lee Thunquest, Berthoud, CO (US);
Lawrence E. Rupp, Loveland, CO (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A method for a file server to support snapshots in a storage area network (SAN) providing a plurality of clients with concurrent direct I/O access to a file system in the SAN, in which the SAN uses an access protocol for file system access. The method includes operating the file server to: start to maintain, at a time T, a time Tsnapshot volume of a live volume of data in the file system; receive, from a client Cat a time subsequent to T, an update access request for a portion of a file that includes data stored in access unit Bof the live volume subsequent to time T; and responsive to the update access request, allocate, to the time Tsnapshot volume, a new access unit Bcorresponding to access unit Band copy data stored in access unit Bto access unit B