Yes...You can use iscsi and and CIFS from same storage pool.
The customer ask me to configure a ISCSI server and a shared server in a VNXe3100 but they only have a 6 NLS-SAS disk, and only create a one raid 6(4+2) pool, so can i share the same pool for boot ISCSI and Shared and connect two diferent server?.   
Its possible to use the same storage pool for ISCSI and CIFS?