Sir I am posting the same topic again because I am unable to reply by pressing reply radio button so I am requesting you to check the functionality of reply radio button.
What "reply radio button" are you referring to? Every Browser I've used the "Reply" is a hyperlink. (e.g., Reply) (Note: Reply link shown just as example, use normal Reply link at bottom of message to reply.)
Sir I am new to sco unix so please suggest step by step on expanding the root file system. I have successfully added another virtual harddisk to the virtual machine and when I open the settings of the virtual machine I am able to see the harddisk added ny me.
I'd suggest reading the SCO UnixWare 7 Documentation, e.g.: Adding hard disks -- example