Thanks for your Reply. uemcli is supported by vnx(Clariion) or vnx(Clerra) storage system...? and unity storage & unified storage system is same or else different ...?
VNX File (NAS) got its own Command line manual and VNX Block uses naviseccli (refer the manual).
VNX2 got some additional features than VNX1 but almost identical.
Links (from the product support page -> Documentation -> Administration :
For Unity, you can repeat the same method.