Added fsGroupPolicy known issue

content/docs/csidriver/release/unity.md

@@ -33,6 +33,7 @@ description: Release notes for Unity XT CSI driver
 | When a node goes down, the block volumes attached to the node cannot be attached to another node | This is a known issue and has been reported at https://github.com/kubernetes-csi/external-attacher/issues/215. Workaround: <br /> 1. Force delete the pod running on the node that went down <br /> 2. Delete the VolumeAttachment to the node that went down. <br /> Now the volume can be attached to the new node. |
 | A CSI ephemeral pod may not get created in OpenShift 4.13 and fail with the error `"error when creating pod: the pod uses an inline volume provided by CSIDriver csi-unity.dellemc.com, and the namespace has a pod security enforcement level that is lower than privileged."` | This issue occurs because OpenShift 4.13 introduced the CSI Volume Admission plugin to restrict the use of a CSI driver capable of provisioning CSI ephemeral volumes during pod admission. Therefore, an additional label `security.openshift.io/csi-ephemeral-volume-profile` in [csidriver.yaml](https://github.com/dell/helm-charts/blob/csi-unity-2.8.0/charts/csi-unity/templates/csidriver.yaml) file with the required security profile value should be provided. Follow [OpenShift 4.13 documentation for CSI Ephemeral Volumes](https://docs.openshift.com/container-platform/4.13/storage/container_storage_interface/ephemeral-storage-csi-inline.html) for more information. |
 | If the volume limit is exhausted and there are pending pods and PVCs due to `exceed max volume count`, the pending PVCs will be bound to PVs and the pending pods will be scheduled to nodes when the driver pods are restarted. | It is advised not to have any pending pods or PVCs once the volume limit per node is exhausted on a CSI Driver. There is an open issue reported with kubenetes at https://github.com/kubernetes/kubernetes/issues/95911 with the same behavior. |
+| fsGroupPolicy may not work as expected without root privileges for NFS only [https://github.com/kubernetes/examples/issues/260](https://github.com/kubernetes/examples/issues/260) | To get the desired behavior set “RootClientEnabled” = “true” in the storage class parameter |
 ### Note:
 
 - Support for Kubernetes alpha features like Volume Health Monitoring and RWOP (ReadWriteOncePod) access mode will not be available in Openshift environment as Openshift doesn't support enabling of alpha features for Production Grade clusters.