Installing and Managing HP-UX Virtual Partitions (A.02.01)

Managing Virtual Partitions
I/O Allocation
Chapter 352
You can change the attributes of an I/O path only when the virtual
partition is down.
For information on supported I/O interfaces and configurations, see
the document HP-UX Virtual Partitions Ordering and Configuration
Guide, available at:
http://docs.hp.com/hpux/11i/index.html#Virtual%20Partitions