Netapp, Inc.

Network Appliance, Inc.

First Pacific Networks

Ranjit Ghate

Tuan Anh Nguyen

Kumar Gajjar

Chan Y Ng

Rahim Ibrahim

Gen-Hwa Chiang

Robert Robbins

Ashish Shah

Robert P McNamara

Michael Michio Ouye

Shanubhog G Sangameswara

Timothy P Murphy

David R Stevens

Celeste Baranski

Gary M Ellis

Kevin T Murphy

Cai U Monsson

Peterpaul Vita

Gigi C Chu

Robert J Cringle

Alan Saldinger

An apparatus and method for testing a network-based storage virtualization system. A tester is connected to a host side of a storage virtualization system. The tester provides test scripts to the storage virtualization system to test I/O and other operations. A separate link, independent of said storage virtualization system, is provided to a storage side of said storage virtualization system to allow verification of the correct translation from virtual to physical independent of the data path used by the virtualization system. Thus, the tester verifies, over the separate link, the physical configuration of VLUNs and data written to the VLUNs by the tester on storage devices.

Auto regression tester for network-based storage virtualization system

A storage virtualization system for accessing at least one storage device for a virtual logical unit (VLUN) from at least one host. The system includes at least one upstream processing element (UPE) which is adapted for coupling to a corresponding host server. The system is further adapted for coupling to at least one storage device. The controller also includes a primary central processing element (CPE) that can be configurably coupled to the UPEs. The primary CPE permits data transfer to occur between a host and a storage device via the corresponding UPE. The controller further includes a backup CPE that can be configurably coupled to the UPEs. The backup CPE is configurable to permit the data transfer when the primary CPE becomes unavailable.

Compensating for unavailability in a storage virtualization system

Detecting unavailability of primary central processing element, each backup central processing element associated with a group of virtual logic units and quiescing I/O operations of the primary central processing element in a storage virtualization system

Auto regression test for network-based storage virtualization system

A distributed intelligence network using time and frequency domain multiplexing. On power-up, each node determines its skew and requests downloading of program code and configuration data. A node claims timeslots by transmitting a packet into an apparently empty timeslot and verifying receipt of its own packet.

Distributed intelligence network using time and frequency multiplexing

Growing community of inventors

Oakland, CA, United States of America

Ranjit Ghate