Patent ID: 9208039
Filing Date: 2015-12-08
Classification: G06F

Abstract:
1. A method of operation of a first storage controller of a cluster, the method comprising: receiving a signal indicating device removal; based upon the received signal, determining that a communicative connection between a second storage controller of the cluster and the first storage controller of cluster is unable to be established; determining whether communicative connection between the first storage controller and expanders of both a first enclosure services manager module and a second enclosure services manager module of the cluster is able to be established; and if it is determined that communicative connection between the first storage controller and the expanders of both the first and second enclosure services manager modules of the cluster is able to be established, performing a failover process; and if it is determined that communicative connection between the first storage controller and the expanders of both the first and second enclosure services manager modules of the cluster is unable to be established, detecting a split brain condition.