HP-UX Virtual Partitions Administrator's Guide (includes A.05.02)

CPU, Memory, and I/O Resources (A.05.xx)
CPU: Notes on vPars Syntax, Rules, and Output
Chapter 6
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When adding by hardware path, the total count changes only when the partition is up. The total does not
change if the specified CPU is already assigned to the partition.
When adding by hardware path and the partition is down, you cannot have the number of CPUs added by
hardware path exceed the current total value.