Sujit -
I thinks you'd have to be able to do a 'snap restore' on the aggregate to a snapshot previous to the time you destroyed the volume and the LUN to bring them back from the dead.
It looks like aggregate snapshots were turned off, so you don't have any aggregate snapshots to restore to.
You may wish to read the 'aggregate snapshots' posting noted in my 'Featured Member' release...
I hope this response has been helpful to you.
At your service,
Eugene E. Kashpureff
ekashp@kashpureff.org
Fastlane NetApp Instructor and Independent Consultant
http://www.linkedin.com/in/eugenekashpureff http://www.kashpureff.org/
(P.S. I appreciate points for helpful or correct answers.)