Compaq StorageWorks HSG60 ACS Solution Software V8.6 for Sun Solaris Installation and Configuration Guide

Fibre Channel: Considerations for Both Loop and Fabric Environments 6–17
Loop to Fabric Reconfiguration
NOTE: This procedure assumes that the Solaris platform kit is loaded and everything is running
as desired but a change of configuration is required.
1. Stop I/O to the subsystem. Perform backups, as required.
2. Remove the connections from the hub.
3. Reconfigure the controller(s) from loop to fabric mode using the CLI.
4. Create the connections from server to switch and from switch to subsystem. For
configurations with multiple adapters and multiple subsystems verify all the Fibre
Channel paths from server to subsystems.
At the server(s), reconfigure the adapters to support the fabric WWPNs and remove the
unused loop Targets. This is accomplished with /opt/steam/bin/Config.sh - Option
20 Add/Change Adapters, Option 4, Modify Adapters. This option allows the mode of
the driver to be changed and the WWPNs to be added for the configuration. For each
adapter that is used in the changed configuration, this modify step must be repeated.
For each server in the changed configuration, this modify step must be repeated.
5. The changes from Step 5 require that the server(s) be rebooted (reboot -r) to
reinitialize the drivers in the correct mode and acquire the new entries/Targets from the
sd.conf files as discussed above. Shutdown and power-off the Sun server before
rebooting. We have found that the adapters must be power-cycled for reliable operation
when changing from loop to fabric mode.
6. Using the
format command, verify that the units of the subsystem(s) are now available.
Fabric to Loop Reconfiguration
NOTE: This procedure assumes that the Solaris platform kit is loaded and everything is running
as desired but a change of configuration is required.
1. Stop I/O to the subsystem. Perform backups as required.
2. Remove connections from the switch and any other intermediate switches to the
subsystem.
3. Reconfigure the controller(s) from fabric support to loop using SWCC or the CLI. At
this time verify that the intended ALPAs are assigned to the controller ports as desired.
The defaults may suffice.
4. Create the connections from server to hub and from hub to subsystem. For
configurations with multiple adapters and multiple subsystems verify all the Fibre
Channel paths from server to subsystems through the hub(s).