Managing Superdome Complexes: A Guide for HP-UX System Administrators

Booting and Resetting Superdome Partitions

Planning and Conﬁguring Partition Boot Settings

Chapter 5 237

the core cell is not directly connected to the I/O chassis where the boot

device resides). See Appendix A for more details.

• Cell “Use-on-Next-Boot” Setting—Each cell in a partition has an

associated use-on-next-boot setting that determines if the cell’s

resources are used by the partition.

This setting does not affect the cell’s partition membership; it only

affects whether the partition to which the cell belongs uses the cell.

When set to “y” (use the cell), the setting allows the cell’s processors,

memory, and any connected I/O to be made available for use by the

partition. This setting causes the cell to be active when it is booted as

part of the partition.

When set to “n” (do not use the cell), the setting causes the cell’s

associated resources to not be available for use by the partition, and

the cell is an inactive member of the partition. The cell still is

assigned to the partition, but is used only if the cell is made active.

The use-on-next-boot setting does not directly affect the partition’s

boot behavior, but it can cause I/O connected to an unused cell to be

unavailable.

To conﬁgurethese boot-related settings refer to “Introduction to Boot and

Reset Tasks” on page 222. Several methods are available for conﬁguring

these settings.

Guidelines for Conﬁguring Partition Boot Settings

The following boot settings are recommended, but are not required.

You should consider the following guidelines, based on your system

conﬁguration and use.

• Designate alternate core cell choices.

This requires that the partition have at least two cells, each

connected to an I/O chassis that contains a core I/O card. This

provides redundancy and potentially improved system availability.

• Conﬁgure HAA and ALT boot devices in addition to the PRI device.

This establishes additional bootable devices, including the mirrored

(HAA) boot disk, which provide redundancy in case the PRI device

fails.