Setting up cluster SAN communication

You must complete the following setup before creating a cluster that uses storage communication interfaces.

The following information applies only to Fibre Channel adapters. You do not need to set up the serial-attached SCSI (SAS) adapters or configure storage area network (SAN) communication to deploy and to manage Cluster Aware AIX (CAA) clusters or PowerHA® SystemMirror® clusters.

SAN communication is supported on Fibre Channel adapters that support the target mode enabled (TME) attribute. The following adapters support SAN communication:

4 GB Single-Port Fibre Channel PCI-X 2.0 DDR Adapter (FC 1905; CCIN 1910)
4 GB Single-Port Fibre Channel PCI-X 2.0 DDR Adapter (FC 5758; CCIN 280D)
4 GB Single-Port Fibre Channel PCI-X Adapter (FC 5773; CCIN 5773)
4 GB Dual-Port Fibre Channel PCI-X Adapter (FC 5774; CCIN 5774)
4 Gb Dual-Port Fibre Channel PCI-X 2.0 DDR Adapter (FC 1910; CCIN 1910)
4 Gb Dual-Port Fibre Channel PCI-X 2.0 DDR Adapter (FC 5759; CCIN 5759)
4-Port 8 Gb PCIe2 FH Fibre Channel Adapter (FC 5729)
8 Gb PCI Express Dual Port Fibre Channel Adapter (FC 5735; CCIN 577D)
8 Gb PCI Express Dual Port Fibre Channel Adapter 1Xe Blade (FC 2B3A; CCIN 2607)
3 Gb Dual-Port SAS Adapter PCI-X DDR External (FC 5900 and 5912; CCIN 572A)

Note: The TME attribute is not supported on a 16 Gb or faster Fibre Channel adapters. For the most current list of supported Fibre Channel adapters, contact your IBM representative.

For the adapter to be supported, it must have target mode support.

The target mode enabled (TME) attribute for a supported adapter is only present when the minimum AIX level for CAA is installed.

To configure the Fibre Channel adapters that will be used for cluster storage communications, complete the following steps:

Note: In the following steps the X in fcsX represents the number of your Fibre Channel adapters, for example, fcs1, fsc2, or fcs3.

Run the following command:
```
rmdev -Rl fcsX
```
Note: If you booted from the Fibre Channel adapter, you do not need to complete this step.
Run the following command:
```
chdev -l fcsX -a tme=yes 
```
Note: If you booted from the Fibre Channel adapter, add the -P flag.

Run the following command:

chdev -l fscsiX -a dyntrk=yes -a fc_err_recov=fast_fail

Run the cfgmgr command.
Note: If you booted from the Fibre Channel adapter and used the -P flag, you must reboot.

Verify the configuration changes by running the following command:

lsdev -C | grep sfwcom

The following is an example of the output displayed from the lsdev -C | grep sfwcom command:

lsdev -C | grep sfwcom
sfwcomm0       Available 01-00-02-FF Fiber Channel Storage Framework Comm
sfwcomm1       Available 01-01-02-FF Fiber Channel Storage Framework Comm

After you create the cluster, you can list the cluster interfaces and view the storage interfaces by running the following command:

lscluster -i