Patent ID: 9424117
Filing Date: 2016-08-23
CPC Classification: G06F

Claim Text:
1. In a data storage apparatus, a method of performing virtual storage processor failover, the method comprising: accessing, by a first physical storage processor of the data storage apparatus, a virtual storage processor (VSP) to create an operating environment for a host file system from the first physical storage processor; after accessing the VSP to create the operating environment for the host file system from the first physical storage processor, detecting a failure of the first physical storage processor; and in response to detecting the failure of the first physical storage processor, accessing, by a second physical storage processor of the data storage apparatus, the VSP to re-create the operating environment for the host file system from the second physical storage processor; wherein accessing the VSP to create the operating environment for the host file system includes processing a first set of commands from a host computer to write host data into a set of storage locations of a set of storage devices; and wherein accessing the VSP to re-create the operating environment for the host file system includes processing a second set of commands from the host computer to read the host data from the same set of storage locations of the same set of storage devices.