prtconf : This command is used to display configuration information, inclusding the total amount of memory and deviced configured on system as per system’s hierarchy. This also verifies whether any device has been seen/recognised by system or not.
Note : The output of prtconf command can vary depending on the version of the host system’s PROM.

sysdef : This command displays device configuration defination which also includes system’s hardware, psuedo devices, selected kernel parameteres and loadable modules.

dmesg : This command displays system diagnostic messages as well as list the devices attached to the system after the resent restart.

format : The format command displays both physical and logical device names for all available disks. You can select the device/disk number and further format it and allocate space according to your need.

cfgadm : This command lists all configured/unconfigured devices on host system.