Before proceeding, ensure the system has Dynamic Reconfiguration capabilities. If you see the following message on your console or in your console logs, the hardware is of an older design and not suitable for Dynamic Reconfiguration:
Hot Plug not supported in this system
Supported I/O boards are listed in the "Solaris 7" section on the web site
http://sunsolve2.sun.com/sunsolve/Enterprise-dr/
The supported hardware includes type 1 and 4 Sun Enterprise I/O boards.