If you are not familiar with the oc command, refer to OpenShift - Getting Started with the oc command.

The oc get pvc command will return the list of persistent volume cliams.

~]$ oc get pvc
NAME     STATUS    VOLUME      CAPACITY   ACCESS MODES   STORAGECLASS               AGE
pvc001   Bound     volume001   4Gi        RWO            glusterfs-registry-block   1y
pvc002   Bound     volume002   4Gi        RWO            glusterfs-registry-block   1y
pvc003   Bound     volume003   4Gi        RWO            glusterfs-registry-block   1y

Or a single persistent volume claim can be returned.

~]$ oc get pvc pvc001
NAME     STATUS    VOLUME      CAPACITY   ACCESS MODES   STORAGECLASS               AGE
pvc001   Bound     volume001   4Gi        RWO            glusterfs-registry-block   1y

The -A o --all-namespaces flag can be used to return every persistent volume claim in every namespace.

oc get pvc --all-namespaces