HP-UX Virtual Partitions Administrator's Guide (includes A.03.05 and A.04.05)

Examples
To add all hardware using the SBA/LBA hardware path of 1/2 to an existing partition
winona2:
winona1# vparmodify -p winona2 -a io:1.2
To remove all hardware with SBA/LBA 1/2 from partition winona2:
winona1# vparmodify -p winona2 -d io:1.2
NOTE: The virtual partition must be in the down state to add or delete I/O resources.
242 CPU, Memory, and I/O Resources (A.03.xx)