Logical volumes

 https://www.ibm.com/docs/pl/aix/7.1?topic=management-logical-volume-manager

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/configuring_and_managing_logical_volumes/index#doc-wrapper

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/4/html/cluster_logical_volume_manager/lvm_definition

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/logical_volume_manager_administration/device_mapper#doc-wrapper

https://opensource.com/business/16/9/linux-users-guide-lvm

https://www.ibm.com/docs/pl/aix/7.1?topic=systems-directories