Technical data

An Overview of nPartition Boot and Reset
Configurable Boot Settings
HP System Partitions Guide: Administration for nPartitions, rev 5.1 176
One cell is selected as the active core cell for the nPartition when
the nPartition boots. By default, the lowest numbered eligible cell in
the nPartition is chosen. To be eligible the cell must: be active, have a
connection to functioning core I/O, and be assigned to the nPartition.
You can designate up to four core cell choices, which are
considered in the order you specify as candidates to be selected as the
active core cell for the nPartition.
If none of the core cell choices is eligible to serve as the core cell, then
the nPartition attempts to select a core cell using the default
algorithm (lowest numbered eligible cell).
When no active cell in an nPartition can be selected, the nPartition
will remain at the ready for reconfig state and cannot boot to BCH.
• Use-on-Next-Boot Value for a Cell
Each cell in an nPartition has an associated use-on-next-boot value
that determines whether the cell’s resources are used by the
nPartition.
This setting does not affect the cell’s nPartition assignment. The
use-on-next-boot value only determines whether the cell is an active
or inactive member of the nPartition when the nPartition boots.
When a cell’s use-on-next-boot value is “y” (use the cell), the cell can
participate in nPartition rendezvous and become an active member of
the nPartition, which enables its processors, memory, and any
connected I/O to be made available for use by the nPartition.
When a cell has a use-on-next-boot value of “n” (do not use the cell),
the cell cannot participate in partition rendezvous so it will be an
inactive member of the nPartition when the nPartition boots: all
processors, memory, and I/O will not be made available.
After changing a cell’s use-on-next-boot value you might need to
reset the nPartition so that all cells have a chance to either
participate in partition rendezvous or remain inactive at BIB. (For
example, if the nPartition is in the ready for reconfig state, just boot
it using the service processor Command menu’s BO command; but if
the nPartition is active and has booted HP-UX then perform a
reboot for reconfig using the shutdown -R command.)
The use-on-next-boot setting does not directly affect the nPartition’s
boot behavior, but it will cause I/O connected to a cell to be
unavailable when the cell boots with a “n” use-on-next-boot value.