The following command can be used to view the device locks:
symdev -lock list (Check for -L / P next to the lock)
L = Long lock, typically associated with SymReplicate and indicates that a long lock is normal. Before releasing lock the customer should check with replicate manager to see if they can stop the process holding the lock.
P = Persistent, cluster-type lock (ex: AIX)
To release the device external lock use:
symdev -lock # release
SAN-Engineer 
I thought of releasing the configuration Lock. Can you please elaborately describe what sort of locks are there and when they will hold the Array & How to remove them manually?
Hi,
There are two kind of locks
Engineering locks/system locks which are usually raised bty the Support and CE for the upgrade of any kind.
USer/configuration locks- These are short time till the user locks database for user level configuration.