IBM 9009-41A Manual page 110

If the adapter supports physical volumes that are in use by a client logical partition, then You can perform
steps on the client logical partition before unconfiguring the storage adapter. For instructions, see
"Preparing the client logical partitions" on page 96. For example, the adapter might be in use because
the physical volume was used to create a virtual target device, or it might be part of a volume group used
to create a virtual target device.
To unconfigure SCSI, SSA, and Fibre Channel storage adapters, complete the following steps:
Procedure
1. Connect to the Virtual I/O Server command-line interface.
2. Enter oem_setup_env to close all applications that are using the adapter you are unconfiguring.
3. Type lsslot-c PCI to list all the hot plug slots in the system unit and display their characteristics.
4. Type lsdev -C to list the current state of all the devices in the system unit.
5. Type unmount to unmount previously mounted file systems, directories, or files using this adapter.
6. Type rmdev -l adapter -R to make the adapter unavailable.
Attention: Do not use the -d flag with the rmdev command for hot plug operations because this
action removes your configuration.
Preparing the client logical partitions
About this task
If the virtual target devices of the client logical partitions are not available, the client logical partitions can
fail or they might be unable to perform I/O operations for a particular application. If you use the HMC to
manage the system, you might have redundant Virtual I/O Server logical partitions, which allow for Virtual
I/O Server maintenance and avoid downtime for client logical partitions. If you are replacing an adapter
on the Virtual I/O Server and your client logical partition is dependent on one or more of the physical
volumes accessed by that adapter, then You can take action on the client before you unconfigure the
adapter.
The virtual target devices must be in the define state before the Virtual I/O Server adapter can be
replaced. Do not remove the virtual devices permanently.
Procedure
To prepare the client logical partitions so that you can unconfigure an adapter, complete the following
steps depending on your situation.
Table 2. Situations and steps for preparing the client logical partitions
Situation
You have redundant hardware on the Virtual I/O
Server for the adapter.
HMC-managed systems only: You have redundant
Virtual I/O Server logical partitions that, in
conjunction with virtual client adapters, provide
multiple paths to the physical volume on the client
logical partition.
96 Power Systems: PCIe adapters for the 9009-41A, 9009-42A, or 9223-42H
Steps
No action is required on the client logical partition.
No action is required on the client logical partition.
However, path errors might be logged on the client
logical partition.