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:
Mar. 10, 2015
Filed:
Jun. 28, 2012
Helen S. Raizen, Jamaica Plain, MA (US);
Hitesh P. Trivedi, Cambridge, MA (US);
Robert J. Pellowski, Ledyard, CT (US);
Jimmy K. Seto, Wakefield, MA (US);
Helen S. Raizen, Jamaica Plain, MA (US);
Hitesh P. Trivedi, Cambridge, MA (US);
Robert J. Pellowski, Ledyard, CT (US);
Jimmy K. Seto, Wakefield, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
A host computer accesses a storage volume via multiple paths and maintains path mode information identifying either an active or standby operating mode. An active-mode path is generally usable, and a standby-mode path is usable under exceptional conditions such as non-availability of an active-mode path. A reason identifier identifies a first operating condition causing the path to be placed in the standby mode. Upon a path-activating event for a standby-mode path, if there is a second operating condition indicating that the path should be maintained in the standby operating mode, then the path is maintained in the standby operating mode and the path mode information is set to identify the second operating condition, and otherwise the operating mode is set to active. A path-activating event can be a manual action by a user or automatic action such as expiration of an aging timer to re-attempt use of a standby path.