First of all identify the existing configuration and setup -
You will observe that the system boards are allocated to a particular host. Un-configure the System Boards from these hosts -
# cfgadm –c unconfigure SB12 (on host1)
# cfgadm –c unconfigure SB10 (on host2)
Check again to ensure system boards have been configured.
# showplatform -v
Get in touch with the Data Center guy or the Sun/Oracle engineer for physical removal and swapping of boards. Once the engineer confirms that the swapping has been successfully done get back on the SC prompt and reconfigure it for respective hosts -
# cfgadm -c configure SB12 (on host2)
# cfgadm -c configure SB10 (on host1)
Restart the machines and you have successfully swapped E25K uniboards.