```
kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: hdd
provisioner: kubernetes.io/azure-disk
mountOptions:
  - barrier=1
  - acl
parameters:
  skuname: Standard_LRS
  kind: Managed
  fstype: ext3
```

([#56147](https://github.com/kubernetes/kubernetes/pull/56147), [@andyzhangx](https://github.com/andyzhangx))

In 1.20, we introduce a new alpha feature `CSIServiceAccountToken`. This feature allows CSI drivers to impersonate the pods that they mount the volumes for. This improves the security posture in the mounting process where the volumes are ACL’ed on the pods’ service account without handing out unnecessary permissions to the CSI drivers’ service account. This feature is especially important for secret-handling CSI drivers, such as the secrets-store-csi-driver. Since these tokens can be rotated...