prakash kerala said:
you should add ur local user's secondary groups as cdrom,games,usb etc
This will not help. Adding those additional groups just allows you to be able to use all those things i.e. read cdrom, play games, use USB etc.
To mount drives as normal user you need to put the option "user" in the related line of your /etc/fstab. For example: If I want to allow normal users to mount/unmount my cdrw drive then I have the following line in my /etc/fstab
Code:
/dev/hda /mnt/cdrom iso9660 noauto,rw,user 0 0
For more info, you should read "man 8 mount" and "man 5 fstab"