Hey,  Please refer to below information. It will help to you. [IMAGE]  Storage resources are distributed between the two SPs; however, a storage resource is only assigned to one SP at a time. For example, a Shared Folder storage created on SPA will not be associated with SPB unless an SP failover occurs.   An SP fails over when it reboots, experiences a hardware or software failure, or a user places it in Service Mode. In this case, the storage resource is failed over to the peer SP. The surviving SP assumes ownership and begins servicing host I/O requests. Note that when one SP is servicing all I/O requests, performance between hosts and the VNXe system can be degraded.  [IMAGE]
Hi All,  Because this is my first emc vnxe experience I have some questions regarding spa and spb failover.  We have 3 esx servers running vm's on or new vnxe. I have created 2 VM datastores running different vm's. one iscsi server on SPA with 2 lans: (172.31.0.20 and 172.31.0.21) other iscsi server on SPB with 2 lans: ( 172.31.0.22 and 172.31.0.23)  because we want to use exchange datastore and cifs for fileserver we needed extra I/O modules. and we bought 4 x 1gb lan for each SP  Now to put a SP  in maintenance mode I'm little scared, is the config good enough?  And second, when I use CIFS configured with shared folder server on SPA in different subnet like 172.30.0.x do I need the same on SPB for failover to work?  Hope someone can help me out.  Thank you! N.K.                 
VNXe 3150 spa/spb failover