In Data ONTAP 8.3, the name assigned to an array LUN has a new format to ensure that the name is unique across a cluster.
The array LUN name consists of two components and looks like the following:
<array_prefix>.<offset>, for example EMC-1.1.
This field is composed of <array_name-array_instance> (EMC-1 in this case).
array_name can be denoted by the first three letters of the name of the vendor.
If there is more than one array from the same vendor, the value of array_instance proceeds in an ascending order.
You can modify the <array_prefix> field by using the storage array modify -name -prefix command.