Merge pull request #110944 from matthiasguentert/aks-azure-disk-csi-update

added note about shrinking

Author: Jak-MS

articles/aks/azure-disk-csi.md

@@ -288,6 +288,10 @@ Expand the PVC by increasing the `spec.resources.requests.storage` field running
 kubectl patch pvc pvc-azuredisk --type merge --patch '{"spec": {"resources": {"requests": {"storage": "15Gi"}}}}'
 ```
 
+> [!NOTE]
+> Shrinking persistent volumes is currently not supported. Trying to patch an existing PVC with a smaller size than the current one leads to the following error message:
+> `The persistentVolumeClaim "pvc-azuredisk" is invalid: spec.resources.requests.storage: Forbidden: field can not be less than previous value.`
+
 The output of the command resembles the following example:
 
 ```output