Patent ID: 8161142
Filing Date: 2012-04-17
Classification: G06F

Abstract:
1. A method accommodating a failure of a primary storage subsystem in a cluster system, comprising: configuring each node in a cluster with a listing of two boot volumes; storing the listing of the boot volumes for each node in flash memory of each node, including defining the boot volume list as comprising a first logical path between a node and the primary storage subsystem, and a second logical path between the node and a secondary storage subsystem, wherein the first logical path points to a boot volume on the primary storage subsystem and the second logical path points to a boot volume on the secondary storage subsystem; changing the roles of the first and second logical paths in response to the failure of the primary storage subsystem and switching access of each node in communication with the primary storage subsystem to the secondary storage subsystem; and during reboot of a third node that was inactivate during the switching access operation, changing the ordering of the first and second logical paths in the listing of two boot volumes local to the third node in response to a management node directing the third node to use the secondary path to obtain a boot volume for the third node.