Technical data

Boot and Reset Overview for nPartitions
Guidelines for Configuring Partition Boot Settings
HP System Partitions Guide: Administration for nPartitions—rp7410
EMSP—[e-mail]
134
When a cell’s use-on-next-boot value is “y” (use the cell), the cell can
participate in partition rendezvous and become an active member of
the partition, which enables its processors, memory, and any
connected I/O to be made available for use by the partition.
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 partition when the partition 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 partition so that all cells have a chance to either participate in
partition rendezvous or remain inactive at BIB. (For example, if the
partition is in a ready for reconfig state, just boot it using the service
processor Command menu’s BO command; but if the partition 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 partition’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.
For details on configure these boot-related settings for an nPartition
refer to the procedures for booting and resetting nPartitions.
Guidelines for Configuring Partition Boot Settings
The following guidelines are points to consider when configuring boot
settings for the nPartitions in your server complex.
• Configure HAA and ALT boot devices in addition to the PRI device.
By configuring HAA and ALT boot device paths, you establish
additional bootable devices that provide redundancy in case the PRI
device fails.
Also configure the path flags for the boot paths, to allow the HAA
device to boot automatically if the device at the PRI path cannot boot.
• Ensure that the core I/O, PRI boot device, and network card(s) all are
connected to same cell (the core cell).
This configuration ensures that the core cell is directly connected to
the I/O required for booting the partition and providing network
connections. Having such a configuration eliminates the requirement
for multiple cells to be functional to provide basic partition services.
HP Restricted / DRAFT
DRAFT NOV 2001