A: Failover occurs at various levels and is dependent on the hardware configuration. For example, with the use of MPXIO on the server, failed Fiber-Channel interfaces will automatically switch over to a working interface. In a clustered environment in which multiple servers can access the same filesystem (ie, NFS, VFS, or QFS filesystems), if one server becomes inoperative, the other servers can still provide access to the data, though the devices associated with the failed server will become boxed. Additionally, the Channel Gateway servers are configured with mirrored internal hard drives and dual power supplies to minimize downtime.