Adding and removing SAS devices is performed dynamically in a SAN network. If you add or remove a device in your SAS domain, messages are written to the /var/adm/messages file indicating its presence or removal. You can verify the addition and removal of SAS device by using the sasinfo command. You can also use the format command to verify the addition and removal of disk devices. The sasinfo utility reports attributes of HBA ports and expander devices that might be connected to the HBA ports. For more information, see the sasinfo(1M) and format(1M) man pages.