Describe the issue: ODF Regional DR documentation does not explicitly state what VolumeModes and what AccessModes it supports, given that it doesn't support all combinations. Describe the task you were trying to accomplish: Given that ODF Regional DR in 4.9 and 4.10 only supports RWO AccessMode, some users incorrectly conclude that it does not support FileSystem VolumeMode. With informative documentation, I hope to remove any confusions that surround the two modes. Most importantly, I want the document to clarify that RWO AccessMode indeed supports FileSystem VolumeMode. Suggestions for improvement: Please include a support matrix of supported VolumeModes and AccessModes in the documentation. Document URL: https://access.redhat.com/documentation/en-us/red_hat_openshift_data_foundation/4.9/html-single/configuring_openshift_data_foundation_for_regional-dr_with_advanced_cluster_management/index#requirements-for-enabling-regional-disaster-recovery_rhodf https://access.redhat.com/documentation/en-us/red_hat_openshift_data_foundation/4.10/html-single/configuring_openshift_data_foundation_for_regional-dr_with_advanced_cluster_management/index#requirements-for-enabling-regional-disaster-recovery_rhodf Product Version: 4.9 & 4.10 Any other versions of this document that also needs this update: https://red-hat-storage.github.io/ocs-training/training/ocs4/odf4-multisite-ramen.html#_overview Additional information: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#volume-mode https://kubernetes.io/docs/concepts/storage/persistent-volumes/#access-modes