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CKA study material · question 804 of 1000

A team wants ReadWriteOncePod on an NFS-backed PersistentVolume provisioned by an in-tree plugin. What blocks them?

  1. NFS never supports write access from a single Pod
  2. ReadWriteOncePod requires the volume to be raw block mode
  3. ReadWriteOncePod requires a ReadWriteMany-capable backend
  4. ReadWriteOncePod is only supported for CSI volumes
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Answer: D. ReadWriteOncePod is only supported for CSI volumes

The mode works only with CSI volumes and requires sufficiently recent csi-provisioner, csi-attacher and csi-resizer sidecars.

Source: Persistent Volumes (Kubernetes) — Access Modes

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