// persistentVolumeClaimVolumeSource represents a reference to a
  // PersistentVolumeClaim in the same namespace.
  // More info: https://kubernetes.io/docs/concepts/storage/persistent-volumes#persistentvolumeclaims
  // +optional
  optional PersistentVolumeClaimVolumeSource persistentVolumeClaim = 10;

  // rbd represents a Rados Block Device mount on the host that shares a pod's lifetime.

- local: support local filesystem volume with block resource reconstruction ([#84218](https://github.com/kubernetes/kubernetes/pull/84218), [@cofyc](https://github.com/cofyc))
- Fixed binding of block PersistentVolumes / PersistentVolumeClaims when BlockVolume feature is off. ([#84049](https://github.com/kubernetes/kubernetes/pull/84049), [@jsafrane](https://github.com/jsafrane))

## Changelog since v1.18.8

## Changes by Kind

### Bug or Regression

- "unbound immediate PersistentVolumeClaims" causes UnschedulableAndUnresolvable status rather than an Error in the scheduler. ([#93892](https://github.com/kubernetes/kubernetes/pull/93892), [@ahg-g](https://github.com/ahg-g)) [SIG Apps and Storage]

* fix: make azure disk URI as case insensitive ([#79020](https://github.com/kubernetes/kubernetes/pull/79020), [@andyzhangx](https://github.com/andyzhangx))
* Fixed binding of block PersistentVolumes / PersistentVolumeClaims when BlockVolume feature is off. ([#84049](https://github.com/kubernetes/kubernetes/pull/84049), [@jsafrane](https://github.com/jsafrane))

- Adds the `ReadWriteOncePod` access mode for `PersistentVolumes` and `PersistentVolumeClaims`. Restricts volume access to a single pod on a single node. ([#102028](https://github.com/kubernetes/kubernetes/pull/102028), [@chrishenzie](https://github.com/chrishenzie))

* Fixed binding of block PersistentVolumes / PersistentVolumeClaims when BlockVolume feature is off. ([#84049](https://github.com/kubernetes/kubernetes/pull/84049), [@jsafrane](https://github.com/jsafrane))

- Better pod events ("waiting for ephemeral volume controller to create the persistentvolumeclaim"" instead of "persistentvolumeclaim not found") when using generic ephemeral volumes. ([#104605](https://github.com/kubernetes/kubernetes/pull/104605), [@pohly](https://github.com/pohly))

### CSI Service Account Token

* Fixed binding of block PersistentVolumes / PersistentVolumeClaims when BlockVolume feature is off. ([#84049](https://github.com/kubernetes/kubernetes/pull/84049), [@jsafrane](https://github.com/jsafrane))

  * This is something to pay close attention to if you’ve been using Kubernetes for a while, because it changes the default behavior of PersistentVolumeClaim objects on these clouds.
  * Marking a StorageClass as default makes it so that even a PersistentVolumeClaim without a StorageClass specified will trigger dynamic provisioning (instead of binding to an existing pool of PVs).