The release string does change a bit over time, but has the same basic format. Here is my 9.0P1 system:
NetApp Release 9.0P1: Sun Oct 16 17:15:15 UTC 2016
Notice that it no longer says "Cluster-Mode".
A more reliable method, particularly if you know you're dealing with clustered ONTAP, is to use the output of "system node image show":
VICE::> system node image show -fields version -iscurrent true
node image version
------- ------ -------
VICE-07 image1 9.0P1
VICE-08 image1 9.0P1
This info can also be accessed using the "system-image-get-iter" API.
Hope that helps.
If this post resolved your issue, please help others by selecting ACCEPT AS SOLUTION or adding a KUDO.