diff --git a/doc/source/deploy_install_guides/r7_release/bare_metal/adding-hosts-using-the-host-add-command.rst b/doc/source/deploy_install_guides/r7_release/bare_metal/adding-hosts-using-the-host-add-command.rst
index f4f7fc80b..cad3d1131 100644
--- a/doc/source/deploy_install_guides/r7_release/bare_metal/adding-hosts-using-the-host-add-command.rst
+++ b/doc/source/deploy_install_guides/r7_release/bare_metal/adding-hosts-using-the-host-add-command.rst
@@ -111,8 +111,8 @@ scripting an initial setup.
         sda.
 
     **<rootfs\_device>**
-        is the host device for rootfs partition, relative to/dev. The default
-        is sda.
+        is a logical volume cgts-vg/root-lv. The default is sda, it should be
+        the same value as specified for the boot_device.
 
     **<mgmt\_mac>**
         is the |MAC| address of the port connected to the internal management
diff --git a/doc/source/deploy_install_guides/r7_release/bare_metal/aio_duplex_install_kubernetes.rst b/doc/source/deploy_install_guides/r7_release/bare_metal/aio_duplex_install_kubernetes.rst
index 2e4079be9..f1b4dfa55 100644
--- a/doc/source/deploy_install_guides/r7_release/bare_metal/aio_duplex_install_kubernetes.rst
+++ b/doc/source/deploy_install_guides/r7_release/bare_metal/aio_duplex_install_kubernetes.rst
@@ -62,7 +62,7 @@ Install Software on Controller-0
 
 .. .. figure:: /shared/figures/deploy_install_guides/starlingx-deployment-options-duplex.png
 ..    :width: 800
- 
+
 ..    All-in-one Duplex deployment configuration
 
 .. _installation-prereqs-duplex:
@@ -449,30 +449,24 @@ Configure controller-0
           # check available space (Avail Size (GiB)) in cgts-vg LVG where docker fs is located
           system host-lvg-list controller-0
           # if existing docker fs size + cgts-vg available space is less than
-          # 80G, you will need to add a new disk partition to cgts-vg.
-          # There must be at least 20GB of available space after the docker
-          # filesystem is increased.
+          # 80G, you will need to add a new disk to cgts-vg.
 
-             # Assuming you have unused space on ROOT DISK, add partition to ROOT DISK.
-             # ( if not use another unused disk )
-
-             # Get device path of ROOT DISK
-             system host-show controller-0 --nowrap | fgrep rootfs
+             # Get device path of BOOT DISK
+             system host-show controller-0 | fgrep rootfs
 
              # Get UUID of ROOT DISK by listing disks
              system host-disk-list controller-0
 
-             # Create new PARTITION on ROOT DISK, and take note of new partition's 'uuid' in response
-             # Use a partition size such that you'll be able to increase docker fs size from 30G to 60G
-             PARTITION_SIZE=30
-             system host-disk-partition-add -t lvm_phys_vol ${NODE} <disk-uuid> ${PARTITION_SIZE}
+             # Add new disk to 'cgts-vg' local volume group
+             system host-pv-add controller-0 cgts-vg <DISK_UUID>
+             sleep 10    # wait for disk to be added
 
-             # Add new partition to 'cgts-vg' local volume group
-             system host-pv-add controller-0 cgts-vg <NEW_PARTITION_UUID>
-             sleep 2    # wait for partition to be added
+             # Confirm the available space and increased number of physical
+             # volumes added to the cgts-vg colume group
+             system host-lvg-list controller-0
 
-             # Increase docker filesystem to 60G
-             system host-fs-modify controller-0 docker=60
+          # Increase docker filesystem to 60G
+          system host-fs-modify controller-0 docker=60
 
 
    #. **For OpenStack only:** Configure the system setting for the vSwitch.
@@ -568,8 +562,24 @@ Configure controller-0
          locking and unlocking controller-0 to apply the change.
 
 
-   #. **For OpenStack only:** Set up disk partition for nova-local volume
-      group, which is needed for |prefix|-openstack nova ephemeral disks.
+   #. **For OpenStack only:** Add an instances filesystem OR Set up a disk
+      based nova-local volume group, which is needed for |prefix|-openstack
+      nova ephemeral disks.
+
+      .. note::
+
+         Both cannot exist at the same time.
+
+      Add an 'instances' filesystem
+
+      .. code-block:: bash
+
+         export NODE=controller-0
+
+         # Create ‘instances’ filesystem
+         system host-fs-add ${NODE} instances=<size>
+
+      OR add a 'nova-local' volume group
 
       .. code-block:: bash
 
@@ -578,29 +588,13 @@ Configure controller-0
          # Create ‘nova-local’ local volume group
          system host-lvg-add ${NODE} nova-local
 
-         # Get UUID of DISK to create PARTITION to be added to ‘nova-local’ local volume group
-         # CEPH OSD Disks can NOT be used
-         # For best performance, do NOT use system/root disk, use a separate physical disk.
+         # Get UUID of an unused DISK to to be added to the ‘nova-local’ volume
+         # group. CEPH OSD Disks can NOT be used
 
          # List host’s disks and take note of UUID of disk to be used
          system host-disk-list ${NODE}
-         # ( if using ROOT DISK, select disk with device_path of
-         #   ‘system host-show ${NODE} | grep rootfs’   )
-
-         # Create new PARTITION on selected disk, and take note of new partition’s ‘uuid’ in response
-         # The size of the PARTITION needs to be large enough to hold the aggregate size of
-         # all nova ephemeral disks of all VMs that you want to be able to host on this host,
-         # but is limited by the size and space available on the physical disk you chose above.
-         # The following example uses a small PARTITION size such that you can fit it on the
-         # root disk, if that is what you chose above.
-         # Additional PARTITION(s) from additional disks can be added later if required.
-         PARTITION_SIZE=30
-
-         system host-disk-partition-add -t lvm_phys_vol ${NODE} <disk-uuid> ${PARTITION_SIZE}
-
-         # Add new partition to ‘nova-local’ local volume group
-         system host-pv-add ${NODE} nova-local <NEW_PARTITION_UUID>
-         sleep 2
+         # Add the unused disk to the ‘nova-local’ volume group
+         system host-pv-add ${NODE} nova-local <DISK_UUID>
 
    #. **For OpenStack only:** Configure data interfaces for controller-0.
       Data class interfaces are vswitch interfaces used by vswitch to provide
@@ -783,37 +777,29 @@ Unlock controller-0
 
       .. code-block:: bash
 
-         # check existing size of docker fs
-         system host-fs-list controller-0
+          # check existing size of docker fs
+          system host-fs-list controller-0
+          # check available space (Avail Size (GiB)) in cgts-vg LVG where docker fs is located
+          system host-lvg-list controller-0
+          # if existing docker fs size + cgts-vg available space is less than
+          # 80G, you will need to add a new disk to cgts-vg.
 
-            # check available space (Avail Size (GiB)) in cgts-vg LVG where docker fs is located
-            system host-lvg-list controller-0
+             # Get device path of BOOT DISK
+             system host-show controller-0 | fgrep rootfs
 
-         # if existing docker fs size + cgts-vg available space is less than
-         # 80G, you will need to add a new disk partition to cgts-vg.
-         # There must be at least 20GB of available space after the docker
-         # filesystem is increased.
+             # Get UUID of ROOT DISK by listing disks
+             system host-disk-list controller-0
 
-                     # Assuming you have unused space on ROOT DISK, add partition to ROOT DISK.
-                     # ( if not use another unused disk )
+             # Add new disk to 'cgts-vg' local volume group
+             system host-pv-add controller-0 cgts-vg <DISK_UUID>
+             sleep 10    # wait for disk to be added
 
-                     # Get device path of ROOT DISK
-                     system host-show controller-0 | grep rootfs
+             # Confirm the available space and increased number of physical
+             # volumes added to the cgts-vg colume group
+             system host-lvg-list controller-0
 
-                     # Get UUID of ROOT DISK by listing disks
-                     system host-disk-list controller-0
-
-                     # Create new PARTITION on ROOT DISK, and take note of new partition’s ‘uuid’ in response
-                     # Use a partition size such that you’ll be able to increase docker fs size from 30G to 60G
-                     PARTITION_SIZE=30
-                     system host-disk-partition-add -t lvm_phys_vol controller-0 <root-disk-uuid> ${PARTITION_SIZE}
-
-                     # Add new partition to 'cgts-vg' local volume group
-                     system host-pv-add controller-0 cgts-vg <NEW_PARTITION_UUID>
-                     sleep 2    # wait for partition to be added
-
-            # Increase docker filesystem to 60G
-            system host-fs-modify controller-0 docker=60
+             # Increase docker filesystem to 60G
+             system host-fs-modify controller-0 docker=60
 
 -------------------------------------
 Install software on controller-1 node
@@ -946,34 +932,28 @@ Configure controller-1
       .. code-block:: bash
 
           # check existing size of docker fs
-          system host-fs-list controller-0
+          system host-fs-list controller-1
           # check available space (Avail Size (GiB)) in cgts-vg LVG where docker fs is located
-          system host-lvg-list controller-0
+          system host-lvg-list controller-1
           # if existing docker fs size + cgts-vg available space is less than
-          # 80G, you will need to add a new disk partition to cgts-vg.
-          # There must be at least 20GB of available space after the docker
-          # filesystem is increased.
+          # 80G, you will need to add a new disk to cgts-vg.
 
-             # Assuming you have unused space on ROOT DISK, add partition to ROOT DISK.
-             # ( if not use another unused disk )
-
-             # Get device path of ROOT DISK
-             system host-show controller-0 --nowrap | fgrep rootfs
+             # Get device path of BOOT DISK
+             system host-show controller-1 | fgrep rootfs
 
              # Get UUID of ROOT DISK by listing disks
-             system host-disk-list controller-0
+             system host-disk-list controller-1
 
-             # Create new PARTITION on ROOT DISK, and take note of new partition's 'uuid' in response
-             # Use a partition size such that you'll be able to increase docker fs size from 30G to 60G
-             PARTITION_SIZE=30
-             system host-disk-partition-add -t lvm_phys_vol ${NODE} <disk-uuid> ${PARTITION_SIZE}
+             # Add new disk to 'cgts-vg' local volume group
+             system host-pv-add controller-1 cgts-vg <DISK_UUID>
+             sleep 10    # wait for disk to be added
 
-             # Add new partition to 'cgts-vg' local volume group
-             system host-pv-add controller-0 cgts-vg <NEW_PARTITION_UUID>
-             sleep 2    # wait for partition to be added
+             # Confirm the available space and increased number of physical
+             # volumes added to the cgts-vg colume group
+             system host-lvg-list controller-1
 
              # Increase docker filesystem to 60G
-             system host-fs-modify controller-0 docker=60
+             system host-fs-modify controller-1 docker=60
 
    #. **For OpenStack only:** Configure the host settings for the vSwitch.
 
@@ -1028,39 +1008,40 @@ Configure controller-1
             system host-memory-modify -f application -1G 10 controller-1 1
 
 
-   #. **For OpenStack only:** Set up disk partition for nova-local volume group,
-      which is needed for |prefix|-openstack nova ephemeral disks.
+   #. **For OpenStack only:** Add an instances filesystem OR Set up a disk
+      based nova-local volume group, which is needed for |prefix|-openstack
+      nova ephemeral disks.
+
+      .. note::
+
+         Both cannot exist at the same time.
+
+      Add an 'instances' filesystem
 
       .. code-block:: bash
 
          export NODE=controller-1
 
-         # Create 'nova-local' local volume group
+         # Create ‘instances’ filesystem
+         system host-fs-add ${NODE} instances=<size>
+
+      OR add a 'nova-local' volume group
+
+      .. code-block:: bash
+
+         export NODE=controller-1
+
+         # Create ‘nova-local’ local volume group
          system host-lvg-add ${NODE} nova-local
 
-         # Get UUID of DISK to create PARTITION to be added to 'nova-local' local volume group
-         # CEPH OSD Disks can NOT be used
-         # For best performance, do NOT use system/root disk, use a separate physical disk.
+         # Get UUID of an unused DISK to to be added to the ‘nova-local’ volume
+         # group. CEPH OSD Disks can NOT be used
 
          # List host’s disks and take note of UUID of disk to be used
          system host-disk-list ${NODE}
-         # ( if using ROOT DISK, select disk with device_path of
-         #   ‘system host-show ${NODE} | grep rootfs’   )
 
-         # Create new PARTITION on selected disk, and take note of new partition’s ‘uuid’ in response
-         # The size of the PARTITION needs to be large enough to hold the aggregate size of
-         # all nova ephemeral disks of all VMs that you want to be able to host on this host,
-         # but is limited by the size and space available on the physical disk you chose above.
-         # The following example uses a small PARTITION size such that you can fit it on the
-         # root disk, if that is what you chose above.
-         # Additional PARTITION(s) from additional disks can be added later if required.
-         PARTITION_SIZE=30
-
-         system host-disk-partition-add -t lvm_phys_vol ${NODE} <disk-uuid> ${PARTITION_SIZE}
-
-         # Add new partition to 'nova-local' local volume group
-         system host-pv-add ${NODE} nova-local <NEW_PARTITION_UUID>
-         sleep 2
+         # Add the unused disk to the ‘nova-local’ volume group
+         system host-pv-add ${NODE} nova-local <DISK_UUID>
 
    #. **For OpenStack only:** Configure data interfaces for controller-1.
       Data class interfaces are vswitch interfaces used by vswitch to provide
diff --git a/doc/source/deploy_install_guides/r7_release/bare_metal/aio_simplex_install_kubernetes.rst b/doc/source/deploy_install_guides/r7_release/bare_metal/aio_simplex_install_kubernetes.rst
index 025536131..739d19e26 100644
--- a/doc/source/deploy_install_guides/r7_release/bare_metal/aio_simplex_install_kubernetes.rst
+++ b/doc/source/deploy_install_guides/r7_release/bare_metal/aio_simplex_install_kubernetes.rst
@@ -29,7 +29,7 @@ Overview
 -----------------------------
 Minimum hardware requirements
 -----------------------------
-   
+
 .. include:: /shared/_includes/prepare-servers-for-installation-91baad307173.rest
    :start-after: begin-min-hw-reqs-sx
    :end-before: end-min-hw-reqs-sx
@@ -320,35 +320,29 @@ The newly installed controller needs to be configured.
 
       .. code-block:: bash
 
-         # check existing size of docker fs
-         ~(keystone_admin)$ system host-fs-list controller-0
-         # check available space (Avail Size (GiB)) in cgts-vg LVG where docker fs is located
-         ~(keystone_admin)$ system host-lvg-list controller-0
-         # if existing docker fs size + cgts-vg available space is less than
-         # 80G, you will need to add a new disk partition to cgts-vg.
-         # There must be at least 20GB of available space after the docker
-         # filesystem is increased.
+          # check existing size of docker fs
+          system host-fs-list controller-0
+          # check available space (Avail Size (GiB)) in cgts-vg LVG where docker fs is located
+          system host-lvg-list controller-0
+          # if existing docker fs size + cgts-vg available space is less than
+          # 60G, you will need to add a new disk to cgts-vg.
 
-            # Assuming you have unused space on ROOT DISK, add partition to ROOT DISK.
-            # ( if not use another unused disk )
+             # Get device path of BOOT DISK
+             system host-show controller-0 | fgrep rootfs
 
-            # Get device path of ROOT DISK
-            ~(keystone_admin)$ system host-show controller-0 | fgrep rootfs
+             # Get UUID of ROOT DISK by listing disks
+             system host-disk-list controller-0
 
-            # Get UUID of ROOT DISK by listing disks
-            ~(keystone_admin)$ system host-disk-list controller-0
+             # Add new disk to 'cgts-vg' local volume group
+             system host-pv-add controller-0 cgts-vg <DISK_UUID>
+             sleep 10    # wait for disk to be added
 
-            # Create new PARTITION on ROOT DISK, and take note of new partition's 'uuid' in response
-            # Use a partition size such that you’ll be able to increase docker fs size from 30G to 60G
-            ~(keystone_admin)$ PARTITION_SIZE=30
-            ~(keystone_admin)$ system host-disk-partition-add -t lvm_phys_vol controller-0 <root-disk-uuid> ${PARTITION_SIZE}
+             # Confirm the available space and increased number of physical
+             # volumes added to the cgts-vg colume group
+             system host-lvg-list controller-0
 
-            # Add new partition to ‘cgts-vg’ local volume group
-            ~(keystone_admin)$ system host-pv-add controller-0 cgts-vg <NEW_PARTITION_UUID>
-            ~(keystone_admin)$ sleep 2    # wait for partition to be added
-
-            # Increase docker filesystem to 60G
-            ~(keystone_admin)$ system host-fs-modify controller-0 docker=60
+          # Increase docker filesystem to 60G
+          system host-fs-modify controller-0 docker=60
 
    #. **For OpenStack only:** Configure the system setting for the vSwitch.
 
@@ -434,40 +428,40 @@ The newly installed controller needs to be configured.
          After controller-0 is unlocked, changing vswitch_type requires
          locking and unlocking controller-0 to apply the change.
 
-   #. **For OpenStack only:** Set up disk partition for nova-local volume
-      group, which is needed for |prefix|-openstack nova ephemeral disks.
+   #. **For OpenStack only:** Add an instances filesystem OR Set up a disk
+      based nova-local volume group, which is needed for |prefix|-openstack
+      nova ephemeral disks.
+
+      .. note::
+
+         Both cannot exist at the same time.
+
+      Add an 'instances' filesystem
 
       .. code-block:: bash
 
-         ~(keystone_admin)$ export NODE=controller-0
+        export NODE=controller-0
+
+         # Create ‘instances’ filesystem
+         system host-fs-add ${NODE} instances=<size>
+
+         OR add a 'nova-local' volume group
+
+      .. code-block:: bash
+
+         export NODE=controller-0
 
          # Create ‘nova-local’ local volume group
-         ~(keystone_admin)$ system host-lvg-add ${NODE} nova-local
+         system host-lvg-add ${NODE} nova-local
 
-         # Get UUID of DISK to create PARTITION to be added to ‘nova-local’ local volume group
-         # CEPH OSD Disks can NOT be used
-         # For best performance, do NOT use system/root disk, use a separate physical disk.
+         # Get UUID of an unused DISK to to be added to the ‘nova-local’ volume
+         # group. CEPH OSD Disks can NOT be used
 
          # List host’s disks and take note of UUID of disk to be used
-         ~(keystone_admin)$ system host-disk-list ${NODE}
-         # ( if using ROOT DISK, select disk with device_path of
-         # host-show ${NODE} | fgrep rootfs’   )
-
-         # Create new PARTITION on selected disk, and take note of new partition’s ‘uuid’ in response
-         # The size of the PARTITION needs to be large enough to hold the aggregate size of
-         # all nova ephemeral disks of all VMs that you want to be able to host on this host,
-         # but is limited by the size and space available on the physical disk you chose above.
-         # The following example uses a small PARTITION size such that you can fit it on the
-         # root disk, if that is what you chose above.
-         # Additional PARTITION(s) from additional disks can be added later if required.
-         ~(keystone_admin)$ PARTITION_SIZE=30
-
-         ~(keystone_admin)$ system host-disk-partition-add -t lvm_phys_vol ${NODE} <disk-uuid> ${PARTITION_SIZE}
-
-         # Add new partition to ‘nova-local’ local volume group
-         ~(keystone_admin)$ system host-pv-add ${NODE} nova-local <NEW_PARTITION_UUID>
-         ~(keystone_admin)$ sleep 2
+         system host-disk-list ${NODE}
 
+         # Add the unused disk to the ‘nova-local’ volume group
+         system host-pv-add ${NODE} nova-local <DISK_UUID>
 
    #. **For OpenStack only:** Configure data interfaces for controller-0.
       Data class interfaces are vSwitch interfaces used by vSwitch to provide
diff --git a/doc/source/deploy_install_guides/r7_release/bare_metal/bulk-host-xml-file-format.rst b/doc/source/deploy_install_guides/r7_release/bare_metal/bulk-host-xml-file-format.rst
index 66b2e7a24..2f0f50b08 100644
--- a/doc/source/deploy_install_guides/r7_release/bare_metal/bulk-host-xml-file-format.rst
+++ b/doc/source/deploy_install_guides/r7_release/bare_metal/bulk-host-xml-file-format.rst
@@ -55,7 +55,7 @@ valid values, refer to the CLI documentation.
     +-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
     | console                                                                                                                                                                                 | If present, this element specifies the port, and if applicable the baud, for displaying messages. If the element is empty or not present, the default setting **ttyS0,115200** is used. |
     +-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
-    | rootfs\_device                                                                                                                                                                          | The device to use for the rootfs partition, relative to /dev.                                                                                                                           |
+    | rootfs\_device                                                                                                                                                                          | The root filesystem is now a logical volume cgts-vg/root-lv. This value when shown should be the same value as the boot_device.                                                         |
     +-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
     | boot\_device                                                                                                                                                                            | The device to use for the boot partition, relative to /dev.                                                                                                                             |
     +-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
diff --git a/doc/source/deploy_install_guides/r7_release/bare_metal/controller_storage_install_kubernetes.rst b/doc/source/deploy_install_guides/r7_release/bare_metal/controller_storage_install_kubernetes.rst
index 19494b606..a6cba369f 100644
--- a/doc/source/deploy_install_guides/r7_release/bare_metal/controller_storage_install_kubernetes.rst
+++ b/doc/source/deploy_install_guides/r7_release/bare_metal/controller_storage_install_kubernetes.rst
@@ -69,52 +69,52 @@ Install Software on Controller-0
 
 
 .. .. only:: starlingx
-.. 
+..
 ..    .. --------
 ..    .. Overview
 ..    .. --------
-..  
+..
 ..    .. .. include:: /shared/_includes/installation-prereqs.rest
 ..    ..    :start-after: begin-install-prereqs-std
 ..    ..    :end-before: end-install-prereqs-std
-.. 
+..
 ..    ---------------------
 ..    Hardware Requirements
 ..    ---------------------
-.. 
+..
 ..    .. include:: /shared/_includes/prepare-servers-for-installation-91baad307173.rest
 ..       :start-after: begin-min-hw-reqs-common-intro
 ..       :end-before: end-min-hw-reqs-common-intro
-.. 
+..
 ..    .. include:: /shared/_includes/prepare-servers-for-installation-91baad307173.rest
 ..       :start-after: begin-min-hw-reqs-std
 ..       :end-before: end-min-hw-reqs-std
-.. 
+..
 ..    The following requirements must be met for worker nodes.
-.. 
+..
 ..    .. include:: /shared/_includes/prepare-servers-for-installation-91baad307173.rest
 ..       :start-after: begin-worker-hw-reqs
 ..       :end-before: end-worker-hw-reqs
-.. 
+..
 ..    .. include:: /shared/_includes/prepare-servers-for-installation-91baad307173.rest
 ..       :start-after: start-prepare-servers-common
 ..       :end-before: end-prepare-servers-common
-.. 
+..
 ..    This section describes the steps to install the StarlingX Kubernetes
 ..    platform on a **StarlingX R7.0 Standard with Controller Storage**
 ..    deployment configuration.
-.. 
+..
 ..    -------------------
 ..    Create bootable USB
 ..    -------------------
-.. 
+..
 ..    Refer to :ref:`Bootable USB <bootable_usb>` for instructions on how to
 ..    create a bootable USB with the StarlingX ISO on your system.
-.. 
+..
 ..    --------------------------------
 ..    Install software on controller-0
 ..    --------------------------------
-.. 
+..
 ..    .. include:: /shared/_includes/inc-install-software-on-controller.rest
 ..       :start-after: incl-install-software-controller-0-standard-start
 ..       :end-before: incl-install-software-controller-0-standard-end
@@ -460,35 +460,29 @@ machine.
 
      .. code-block:: bash
 
-        # check existing size of docker fs
-        system host-fs-list controller-0
+          # check existing size of docker fs
+          system host-fs-list controller-0
+          # check available space (Avail Size (GiB)) in cgts-vg LVG where docker fs is located
+          system host-lvg-list controller-0
+          # if existing docker fs size + cgts-vg available space is less than
+          # 60G, you will need to add a new disk to cgts-vg.
 
-        # check available space (Avail Size (GiB)) in cgts-vg LVG where docker fs is located
-        system host-lvg-list controller-0
+             # Get device path of BOOT DISK
+             system host-show controller-0 | fgrep rootfs
 
-        # if existing docker fs size + cgts-vg available space is less than
-        # 60G, you will need to add a new disk partition to cgts-vg.
+             # Get UUID of ROOT DISK by listing disks
+             system host-disk-list controller-0
 
-                # Assuming you have unused space on ROOT DISK, add partition to ROOT DISK.
-                # ( if not use another unused disk )
+             # Add new disk to 'cgts-vg' local volume group
+             system host-pv-add controller-0 cgts-vg <DISK_UUID>
+             sleep 10    # wait for disk to be added
 
-                # Get device path of ROOT DISK
-                system host-show controller-0 | fgrep rootfs
+             # Confirm the available space and increased number of physical
+             # volumes added to the cgts-vg colume group
+             system host-lvg-list controller-0
 
-                # Get UUID of ROOT DISK by listing disks
-                system host-disk-list controller-0
-
-                # Create new PARTITION on ROOT DISK, and take note of new partition’s ‘uuid’ in response
-                # Use a partition size such that you’ll be able to increase docker fs size from 30G to 60G
-                PARTITION_SIZE=30
-                system system host-disk-partition-add -t lvm_phys_vol controller-0 <root-disk-uuid> ${PARTITION_SIZE}
-
-                # Add new partition to ‘cgts-vg’ local volume group
-                system host-pv-add controller-0 cgts-vg <NEW_PARTITION_UUID>
-                sleep 2    # wait for partition to be added
-
-        # Increase docker filesystem to 60G
-        system host-fs-modify controller-0 docker=60
+          # Increase docker filesystem to 60G
+          system host-fs-modify controller-0 docker=60
 
 -------------------------------------------------
 Install software on controller-1 and worker nodes
@@ -641,35 +635,29 @@ machine.
 
      .. code-block:: bash
 
-        # check existing size of docker fs
-        system host-fs-list controller-1
+          # check existing size of docker fs
+          system host-fs-list controller-1
+          # check available space (Avail Size (GiB)) in cgts-vg LVG where docker fs is located
+          system host-lvg-list controller-1
+          # if existing docker fs size + cgts-vg available space is less than
+          # 80G, you will need to add a new disk to cgts-vg.
 
-        # check available space (Avail Size (GiB)) in cgts-vg LVG where docker fs is located
-        system host-lvg-list controller-1
+             # Get device path of BOOT DISK
+             system host-show controller-1 | fgrep rootfs
 
-        # if existing docker fs size + cgts-vg available space is less than
-        # 60G, you will need to add a new disk partition to cgts-vg.
+             # Get UUID of ROOT DISK by listing disks
+             system host-disk-list controller-1
 
-                # Assuming you have unused space on ROOT DISK, add partition to ROOT DISK.
-                # ( if not use another unused disk )
+             # Add new disk to 'cgts-vg' local volume group
+             system host-pv-add controller-1 cgts-vg <DISK_UUID>
+             sleep 10    # wait for disk to be added
 
-                # Get device path of ROOT DISK
-                system host-show controller-1 | fgrep rootfs
+             # Confirm the available space and increased number of physical
+             # volumes added to the cgts-vg colume group
+             system host-lvg-list controller-1
 
-                # Get UUID of ROOT DISK by listing disks
-                system host-disk-list controller-1
-
-                # Create new PARTITION on ROOT DISK, and take note of new partition’s ‘uuid’ in response
-                # Use a partition size such that you’ll be able to increase docker fs size from 30G to 60G
-                PARTITION_SIZE=30
-                system host disk-partition-add -t lvm_phys_vol controller-1 <root-disk-uuid> ${PARTITION_SIZE}
-
-                # Add new partition to ‘cgts-vg’ local volume group
-                system host-pv-add controller-1 cgts-vg <NEW_PARTITION_UUID>
-                sleep 2    # wait for partition to be added
-
-        # Increase docker filesystem to 60G
-        system host-fs-modify controller-1 docker=60
+          # Increase docker filesystem to 60G
+          system host-fs-modify controller-1 docker=60
 
 .. incl-unlock-controller-1-end:
 
@@ -808,37 +796,38 @@ Configure worker nodes
 
             done
 
-   #. **For OpenStack only:** Setup disk partition for nova-local volume group,
-      needed for |prefix|-openstack nova ephemeral disks.
+   #. **For OpenStack only:** Add an instances filesystem OR Set up a disk
+      based nova-local volume group, which is needed for |prefix|-openstack
+      nova ephemeral disks.
+
+      .. note::
+
+         Both cannot exist at the same time.
+
+      Add an 'instances' filesystem
+
+      .. code-block:: bash
+
+         # Create ‘instances’ filesystem
+         for NODE in worker-0 worker-1; do
+            system host-fs-add ${NODE} instances=<size>
+         done
+
+      OR add a 'nova-local' volume group
 
       .. code-block:: bash
 
          for NODE in worker-0 worker-1; do
-            system host-lvg-add ${NODE} nova-local
+             # Create ‘nova-local’ local volume group
+             system host-lvg-add ${NODE} nova-local
 
-            # Get UUID of DISK to create PARTITION to be added to ‘nova-local’ local volume group
-            # CEPH OSD Disks can NOT be used
-            # For best performance, do NOT use system/root disk, use a separate physical disk.
+             # Get UUID of an unused DISK to to be added to the ‘nova-local’ volume
+             # group. CEPH OSD Disks can NOT be used. Assume /dev/sdb is unused
+             # on all workers
+             DISK_UUID=$(system host-disk-list ${NODE} | awk '/sdb/{print $2}')
 
-            # List host’s disks and take note of UUID of disk to be used
-            system host-disk-list ${NODE}
-            # ( if using ROOT DISK, select disk with device_path of
-            #   ‘system host-show ${NODE} | fgrep rootfs’   )
-
-            # Create new PARTITION on selected disk, and take note of new partition’s ‘uuid’ in response
-            # The size of the PARTITION needs to be large enough to hold the aggregate size of
-            # all nova ephemeral disks of all VMs that you want to be able to host on this host,
-            # but is limited by the size and space available on the physical disk you chose above.
-            # The following example uses a small PARTITION size such that you can fit it on the
-            # root disk, if that is what you chose above.
-            # Additional PARTITION(s) from additional disks can be added later if required.
-            PARTITION_SIZE=30
-
-            system host disk-partition-add -t lvm_phys_vol ${NODE} <disk-uuid> ${PARTITION_SIZE}
-
-            # Add new partition to ‘nova-local’ local volume group
-            system host-pv-add ${NODE} nova-local <NEW_PARTITION_UUID>
-            sleep 2
+             # Add the unused disk to the ‘nova-local’ volume group
+            system host-pv-add ${NODE} nova-local ${DISK_UUID}
          done
 
    #. **For OpenStack only:** Configure data interfaces for worker nodes.
diff --git a/doc/source/deploy_install_guides/r7_release/bare_metal/dedicated_storage_install_kubernetes.rst b/doc/source/deploy_install_guides/r7_release/bare_metal/dedicated_storage_install_kubernetes.rst
index 49f71d41b..e435f4489 100644
--- a/doc/source/deploy_install_guides/r7_release/bare_metal/dedicated_storage_install_kubernetes.rst
+++ b/doc/source/deploy_install_guides/r7_release/bare_metal/dedicated_storage_install_kubernetes.rst
@@ -436,37 +436,34 @@ Configure worker nodes
 
             done
 
-   #. **For OpenStack only:** Setup disk partition for nova-local volume group,
-      needed for |prefix|-openstack nova ephemeral disks.
+   #. **For OpenStack only:** Add an instances filesystem OR Set up a disk
+      based nova-local volume group, which is needed for |prefix|-openstack
+      nova ephemeral disks. NOTE: both cannot exist ast the same time
+
+      Add an 'instances' filesystem
+
+      .. code-block:: bash
+
+         # Create ‘instances’ filesystem
+         for NODE in worker-0 worker-1; do
+            system host-fs-add ${NODE} instances=<size>
+         done
+
+      OR add a 'nova-local' volume group
 
       .. code-block:: bash
 
          for NODE in worker-0 worker-1; do
-            system host-lvg-add ${NODE} nova-local
+             # Create ‘nova-local’ local volume group
+             system host-lvg-add ${NODE} nova-local
 
-            # Get UUID of DISK to create PARTITION to be added to ‘nova-local’ local volume group
-            # CEPH OSD Disks can NOT be used
-            # For best performance, do NOT use system/root disk, use a separate physical disk.
+             # Get UUID of an unused DISK to to be added to the ‘nova-local’ volume
+             # group. CEPH OSD Disks can NOT be used. Assume /dev/sdb is unused
+             # on all workers
+             DISK_UUID=$(system host-disk-list ${NODE} | awk '/sdb/{print $2}')
 
-            # List host’s disks and take note of UUID of disk to be used
-            system host-disk-list ${NODE}
-            # ( if using ROOT DISK, select disk with device_path of
-            #   ‘system host-show ${NODE} | fgrep rootfs’   )
-
-            # Create new PARTITION on selected disk, and take note of new partition’s ‘uuid’ in response
-            # The size of the PARTITION needs to be large enough to hold the aggregate size of
-            # all nova ephemeral disks of all VMs that you want to be able to host on this host,
-            # but is limited by the size and space available on the physical disk you chose above.
-            # The following example uses a small PARTITION size such that you can fit it on the
-            # root disk, if that is what you chose above.
-            # Additional PARTITION(s) from additional disks can be added later if required.
-            PARTITION_SIZE=30
-
-            system hostdisk-partition-add -t lvm_phys_vol ${NODE} <disk-uuid> ${PARTITION_SIZE}
-
-            # Add new partition to ‘nova-local’ local volume group
-            system host-pv-add ${NODE} nova-local <NEW_PARTITION_UUID>
-            sleep 2
+             # Add the unused disk to the ‘nova-local’ volume group
+            system host-pv-add ${NODE} nova-local ${DISK_UUID}
          done
 
    #. **For OpenStack only:** Configure data interfaces for worker nodes.
diff --git a/doc/source/deploy_install_guides/r7_release/bare_metal/rook_storage_install_kubernetes.rst b/doc/source/deploy_install_guides/r7_release/bare_metal/rook_storage_install_kubernetes.rst
index dffd00a86..1468b633c 100644
--- a/doc/source/deploy_install_guides/r7_release/bare_metal/rook_storage_install_kubernetes.rst
+++ b/doc/source/deploy_install_guides/r7_release/bare_metal/rook_storage_install_kubernetes.rst
@@ -614,20 +614,14 @@ OpenStack-specific host configuration
          :start-after: ref1-begin
          :end-before: ref1-end
 
-#. **For OpenStack only:** Set up disk partition for nova-local volume group,
+#. **For OpenStack only:** Set up 'instances' filesystem,
    which is needed for |prefix|-openstack nova ephemeral disks.
 
    ::
 
      for NODE in worker-0 worker-1; do
-       echo "Configuring Nova local for: $NODE"
-       ROOT_DISK=$(system host-show ${NODE} | grep rootfs | awk '{print $4}')
-       ROOT_DISK_UUID=$(system host-disk-list ${NODE} --nowrap | grep ${ROOT_DISK} | awk '{print $2}')
-       PARTITION_SIZE=10
-       NOVA_PARTITION=$(system host-disk-partition-add -t lvm_phys_vol ${NODE} ${ROOT_DISK_UUID} ${PARTITION_SIZE})
-       NOVA_PARTITION_UUID=$(echo ${NOVA_PARTITION} | grep -ow "| uuid | [a-z0-9\-]* |" | awk '{print $4}')
-       system host-lvg-add ${NODE} nova-local
-       system host-pv-add ${NODE} nova-local ${NOVA_PARTITION_UUID}
+       echo "Configuring 'instances' for Nova ephemeral storage: $NODE"
+       system host-fs-add ${NODE} instances=10
      done
 
 --------------------
diff --git a/doc/source/deploy_install_guides/r7_release/virtual/aio_duplex_install_kubernetes.rst b/doc/source/deploy_install_guides/r7_release/virtual/aio_duplex_install_kubernetes.rst
index ab55ef9c0..ee5b86be6 100644
--- a/doc/source/deploy_install_guides/r7_release/virtual/aio_duplex_install_kubernetes.rst
+++ b/doc/source/deploy_install_guides/r7_release/virtual/aio_duplex_install_kubernetes.rst
@@ -475,24 +475,13 @@ OpenStack-specific host configuration
 
          system host-label-assign controller-0 sriov=enabled
 
-#. **For OpenStack only:** Set up disk partition for nova-local volume group,
-   which is needed for |prefix|-openstack nova ephemeral disks:
+#. **For OpenStack only:** Set up a 'instances' filesystem,
+   which is needed for |prefix|-openstack nova ephemeral disks.
 
    ::
 
       export NODE=controller-1
-
-      echo ">>> Getting root disk info"
-      ROOT_DISK=$(system host-show ${NODE} | grep rootfs | awk '{print $4}')
-      ROOT_DISK_UUID=$(system host-disk-list ${NODE} --nowrap | grep ${ROOT_DISK} | awk '{print $2}')
-      echo "Root disk: $ROOT_DISK, UUID: $ROOT_DISK_UUID"
-
-      echo ">>>> Configuring nova-local"
-      NOVA_SIZE=34
-      NOVA_PARTITION=$(system host-disk-partition-add -t lvm_phys_vol ${NODE} ${ROOT_DISK_UUID} ${NOVA_SIZE})
-      NOVA_PARTITION_UUID=$(echo ${NOVA_PARTITION} | grep -ow "| uuid | [a-z0-9\-]* |" | awk '{print $4}')
-      system host-lvg-add ${NODE} nova-local
-      system host-pv-add ${NODE} nova-local ${NOVA_PARTITION_UUID}
+      system host-fs-add ${NODE} instances=34
 
 -------------------
 Unlock controller-1
diff --git a/doc/source/deploy_install_guides/r7_release/virtual/aio_simplex_install_kubernetes.rst b/doc/source/deploy_install_guides/r7_release/virtual/aio_simplex_install_kubernetes.rst
index 7604d276f..6f949c303 100644
--- a/doc/source/deploy_install_guides/r7_release/virtual/aio_simplex_install_kubernetes.rst
+++ b/doc/source/deploy_install_guides/r7_release/virtual/aio_simplex_install_kubernetes.rst
@@ -319,25 +319,13 @@ OpenStack-specific host configuration
    NOT supported, only |OVS| is supported. Therefore, simply use the default
    |OVS| vSwitch here.
 
-#. **For OpenStack Only:** Set up disk partition for nova-local volume group,
+#. **For OpenStack only:** Set up a 'instances' filesystem,
    which is needed for |prefix|-openstack nova ephemeral disks.
 
    ::
 
      export NODE=controller-0
-
-     echo ">>> Getting root disk info"
-     ROOT_DISK=$(system host-show ${NODE} | grep rootfs | awk '{print $4}')
-     ROOT_DISK_UUID=$(system host-disk-list ${NODE} --nowrap | grep ${ROOT_DISK} | awk '{print $2}')
-     echo "Root disk: $ROOT_DISK, UUID: $ROOT_DISK_UUID"
-
-     echo ">>>> Configuring nova-local"
-     NOVA_SIZE=34
-     NOVA_PARTITION=$(system host-disk-partition-add -t lvm_phys_vol ${NODE} ${ROOT_DISK_UUID} ${NOVA_SIZE})
-     NOVA_PARTITION_UUID=$(echo ${NOVA_PARTITION} | grep -ow "| uuid | [a-z0-9\-]* |" | awk '{print $4}')
-     system host-lvg-add ${NODE} nova-local
-     system host-pv-add ${NODE} nova-local ${NOVA_PARTITION_UUID}
-     sleep 2
+     system host-fs-add ${NODE} instances=34
 
 .. incl-config-controller-0-openstack-specific-aio-simplex-end:
 
diff --git a/doc/source/deploy_install_guides/r7_release/virtual/controller_storage_install_kubernetes.rst b/doc/source/deploy_install_guides/r7_release/virtual/controller_storage_install_kubernetes.rst
index abd9a99e2..a73d3d2eb 100644
--- a/doc/source/deploy_install_guides/r7_release/virtual/controller_storage_install_kubernetes.rst
+++ b/doc/source/deploy_install_guides/r7_release/virtual/controller_storage_install_kubernetes.rst
@@ -523,21 +523,15 @@ OpenStack-specific host configuration
 
          system host-label-assign controller-0 sriov=enabled
 
-#. **For OpenStack only:** Set up disk partition for nova-local volume group,
-   which is needed for |prefix|-openstack nova ephemeral disks:
+#. **For OpenStack only:** Set up a 'instances' filesystem,
+   which is needed for |prefix|-openstack nova ephemeral disks.
 
    ::
 
-      for NODE in worker-0 worker-1; do
-        echo "Configuring Nova local for: $NODE"
-        ROOT_DISK=$(system host-show ${NODE} | grep rootfs | awk '{print $4}')
-        ROOT_DISK_UUID=$(system host-disk-list ${NODE} --nowrap | grep ${ROOT_DISK} | awk '{print $2}')
-        PARTITION_SIZE=10
-        NOVA_PARTITION=$(system host-disk-partition-add -t lvm_phys_vol ${NODE} ${ROOT_DISK_UUID} ${PARTITION_SIZE})
-        NOVA_PARTITION_UUID=$(echo ${NOVA_PARTITION} | grep -ow "| uuid | [a-z0-9\-]* |" | awk '{print $4}')
-        system host-lvg-add ${NODE} nova-local
-        system host-pv-add ${NODE} nova-local ${NOVA_PARTITION_UUID}
-      done
+     for NODE in worker-0 worker-1; do
+       echo "Configuring 'instances' for Nova ephemeral storage: $NODE"
+       system host-fs-add ${NODE} instances=10
+     done
 
 -------------------
 Unlock worker nodes
diff --git a/doc/source/deploy_install_guides/r7_release/virtual/dedicated_storage_install_kubernetes.rst b/doc/source/deploy_install_guides/r7_release/virtual/dedicated_storage_install_kubernetes.rst
index 0335f7710..f44ed4f05 100644
--- a/doc/source/deploy_install_guides/r7_release/virtual/dedicated_storage_install_kubernetes.rst
+++ b/doc/source/deploy_install_guides/r7_release/virtual/dedicated_storage_install_kubernetes.rst
@@ -372,21 +372,15 @@ OpenStack-specific host configuration
         system host-label-assign $NODE  sriov=enabled
       done
 
-#. **For OpenStack only:** Set up disk partition for nova-local volume group,
-   which is needed for |prefix|-openstack nova ephemeral disks:
+#. **For OpenStack only:** Set up a 'instances' filesystem,
+   which is needed for |prefix|-openstack nova ephemeral disks.
 
    ::
 
-      for NODE in worker-0 worker-1; do
-        echo "Configuring Nova local for: $NODE"
-        ROOT_DISK=$(system host-show ${NODE} | grep rootfs | awk '{print $4}')
-        ROOT_DISK_UUID=$(system host-disk-list ${NODE} --nowrap | grep ${ROOT_DISK} | awk '{print $2}')
-        PARTITION_SIZE=10
-        NOVA_PARTITION=$(system host-disk-partition-add -t lvm_phys_vol ${NODE} ${ROOT_DISK_UUID} ${PARTITION_SIZE})
-        NOVA_PARTITION_UUID=$(echo ${NOVA_PARTITION} | grep -ow "| uuid | [a-z0-9\-]* |" | awk '{print $4}')
-        system host-lvg-add ${NODE} nova-local
-        system host-pv-add ${NODE} nova-local ${NOVA_PARTITION_UUID}
-      done
+     for NODE in worker-0 worker-1; do
+       echo "Configuring 'instances' for Nova ephemeral storage: $NODE"
+       system host-fs-add ${NODE} instances=10
+     done
 
 -------------------
 Unlock worker nodes
diff --git a/doc/source/deploy_install_guides/r7_release/virtual/install_virtualbox.rst b/doc/source/deploy_install_guides/r7_release/virtual/install_virtualbox.rst
index eaeedfb72..99e527e01 100644
--- a/doc/source/deploy_install_guides/r7_release/virtual/install_virtualbox.rst
+++ b/doc/source/deploy_install_guides/r7_release/virtual/install_virtualbox.rst
@@ -302,9 +302,8 @@ installation:
   supports using a different disk for the boot partition. This is specified with
   the ``boot_device`` option.
 
-* Rootfs device: This is the device that is to be used for the rootfs and
-  various platform partitions. The default is ``sda``. This is specified with
-  the ``rootfs_device`` option.
+* Rootfs device: The root filesystem is now a logical volume ``cgts-vg/root-lv``.
+  This value should be the same as the boot_device.
 
 * Install output: Text mode vs graphical. The default is ``text``. This is
   specified with the ``install_output`` option.
diff --git a/doc/source/deploy_install_guides/r7_release/virtual/rook_storage_install_kubernetes.rst b/doc/source/deploy_install_guides/r7_release/virtual/rook_storage_install_kubernetes.rst
index d7fa0d499..1738d1e12 100644
--- a/doc/source/deploy_install_guides/r7_release/virtual/rook_storage_install_kubernetes.rst
+++ b/doc/source/deploy_install_guides/r7_release/virtual/rook_storage_install_kubernetes.rst
@@ -440,21 +440,15 @@ OpenStack-specific host configuration
         system host-label-assign $NODE  sriov=enabled
       done
 
-#. **For OpenStack only:** Set up disk partition for nova-local volume group,
-   which is needed for |prefix|-openstack nova ephemeral disks:
+#. **For OpenStack only:** Set up a 'instances' filesystem,
+   which is needed for |prefix|-openstack nova ephemeral disks.
 
    ::
 
-      for NODE in worker-0 worker-1; do
-        echo "Configuring Nova local for: $NODE"
-        ROOT_DISK=$(system host-show ${NODE} | grep rootfs | awk '{print $4}')
-        ROOT_DISK_UUID=$(system host-disk-list ${NODE} --nowrap | grep ${ROOT_DISK} | awk '{print $2}')
-        PARTITION_SIZE=10
-        NOVA_PARTITION=$(system host-disk-partition-add -t lvm_phys_vol ${NODE} ${ROOT_DISK_UUID} ${PARTITION_SIZE})
-        NOVA_PARTITION_UUID=$(echo ${NOVA_PARTITION} | grep -ow "| uuid | [a-z0-9\-]* |" | awk '{print $4}')
-        system host-lvg-add ${NODE} nova-local
-        system host-pv-add ${NODE} nova-local ${NOVA_PARTITION_UUID}
-      done
+     for NODE in worker-0 worker-1; do
+       echo "Configuring 'instances' for Nova ephemeral storage: $NODE"
+       system host-fs-add ${NODE} instances=10
+     done
 
 -------------------
 Unlock worker nodes
diff --git a/doc/source/storage/openstack/create-or-change-the-size-of-nova-local-storage.rst b/doc/source/storage/openstack/create-or-change-the-size-of-nova-local-storage.rst
index 019e85ec5..9617fa58d 100644
--- a/doc/source/storage/openstack/create-or-change-the-size-of-nova-local-storage.rst
+++ b/doc/source/storage/openstack/create-or-change-the-size-of-nova-local-storage.rst
@@ -14,12 +14,15 @@ you prefer, you can use the |CLI|.
 You can use entire disks or disk partitions on compute hosts for use as
 **nova-local** storage. You can add multiple disks or disk partitions. Once a
 disk is added and configuration is persisted through a lock/unlock, the disk
-can no longer be removed.
+can no longer be removed. For single-disk computes you can add the 'instances'
+filesystem via the :command:`host-fs-add` command. The 'instances' filesystem OR a
+'nova-local' volume group can be added. Both cannot exist at the same time as
+they share a common mountpoint.
 
 .. caution::
 
-    If a root-disk partition on *any* compute host is used for local storage,
-    then for performance reasons, *all* VMs on the system must be booted from
+    If an 'instances' filesystem is used  on *any* compute host then for
+    performance reasons, *all* VMs on the system must be booted from
     Cinder volumes, and must not use ephemeral or swap disks. For more
     information, see :ref:`Storage on Compute Hosts
     <storage-on-compute-hosts>`.