You are designing a storage solution for a customer concerned about storage availability during
code upgrades. Which HP 3PAR Port Persistence node identity handles host I/O requests, thus
providing greater resiliency during code upgrades?

A.
Guest

B.
Master

C.
Slave

D.
Native

Explanation:

Persistent Ports
This is a really cool feature as well – it gives the ability to provide redundant connectivity to multiple
controllers on a 3PAR array without having to have host-based multipathing software. How is this
possible? Basically it is NPIV for the array. Peer controllers can assume the world wide names for
the ports on their partner controller.
If a controller goes down, it’s peer assumes the identities of that controller’s ports, instantaneously
providing connectivity for hosts that were (not directly) connected to the portson the downed
controller. This eliminates pauses for MPIO software to detect faults and fail over, and generally
makes life a better place.