User guide

Virtual Connect fabrics 143
• When creating the DirectAttach fabric, all participating uplinks can be connected to the same 3PAR
storage system in order to form a VC SAN fabric correctly.
When a DirectAttach VC SAN fabric is using multiple uplink ports, features of login balancing and login
re-distribution are not applicable. These features apply only on the uplinks within a FabricAttach VC
SAN fabric.
• For more control over the uplink port utilization, you can create several DirectAttach VC SAN fabrics
connected to the same 3PAR storage system. This configuration can assist the distribution of servers
according to server I/O needs and workloads.