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

Conﬁguring and Managing Superdome Partitions

Procedures for Managing Partitions

Chapter 4200

Moving an I/O Chassis to a Different Cell

Each I/O chassis is physically cabled to one of the cells in the same

Superdome complex. This cabling makes the I/O chassis available to the

cell and to the partition to which the cell is assigned.

Normally each I/O chassis remains directly cabled to the same cell.

However if your needs require connecting the I/O chassis to a different

cell you can do so by coordinating with your HP service representative.

CAUTION Do not move the cables that connect I/O chassis to cell boards. This is an

operation that only Hewlett-Packard service personnel should perform.

When changing the I/O-to-cell cabling for an I/O chassis, you must

consider the following issues.

• All devices that are connected to cards in the I/O chassis will be

available only to the partition to which the I/O chassis’ cell is

assigned.

Connecting an I/O chassis to a different cell can cause the partition to

not meet the hardware requirements if, for example, doing so causes

the partition to not have a core I/O card or boot disk available.

If cabling the I/O chassis to a different cell causes the I/O to be

assigned to a different partition, you must consider how this will

affect the current partition.

For details see “Partition Hardware Requirements” on page 124.

• The hardware paths to all cards in the I/O chassis will change when

the chassis is connected to a different cell.

This will likely affect LVM physical volume headers and other HP-UX

hardware paths. Devices and logical volumes may not be accessible

until you reconﬁgure HP-UX and/or LVM.

• Any partitions that contain the source and/or the destination cells for

the I/O chassis must be shut down and powered off when changing

the I/O chassis cabling to the cells.

Plan the recabling of your Superdome I/O chassis by referring to the

guidelines in “Partition Hardware Requirements” on page 124,

Appendix A, “Planning Superdome Conﬁgurations,” on page 283, and by

coordinating with your HP sales or service representative.