i am using a flavor of solaris...
There is no command called sudo..
If i have to enter as super user then i will use
su - <account name>
will take you to the subsequent account

But i did look up the man pages and found a way out!!!
bash 3.2$: su - root -c eject
password: ******
<i am able to eject the drive>
bash3.2$:

and so i return back to default user......
so all my queries are solved...
However i am curious to know, since i have provided for a password, the system will ask for a passwd conformation...
But if dont ,then will it just skip the passwd thing, and proceed with ejecting??