You can use the Unified Storage Management plugin 5.6.3 on vSphere 5.5

https://download.emc.com/downloads/DL53593_VSI_Unified_Storage_Management_5.6.3.zip

https://support.emc.com/docu53571_VSI-for-VMware-vSphere:-Storage-Viewer-5.6.3-Release-Notes.pdf?language=en_US

edit: 5.6.3

USM is only one of the features available when using the thick client and is used for storage provisioning.  In-context storage mapping is done with the Storage Viewer and there is also path management and features for AppSync, RecoverPoint with SRM and SRA Utilities for SRDF/SRM.  If you search by product you will see them all:

i am not seeing emc vsi tab in vsphere 5.5. IN 5.1 I was able to see it and see the luns map to which lun in emc.

Hi,

you would need to install and configure the EMC VSI Storage Viewer PlugIn.

Regards,

Ralf