Non-destructive partition growth.

These instructions for direct disk partition mounting,
without LVM or btrfs, etc.
Only works if partition to be enlarged is the last partition on the disk
to be used.

Determine FS device /dev/sd? and SCSI ID for target disk.  Verify fs type.
    mount | grep some/thing
    ls -l /dev/disk/by-path/ | grep sdX

Back up df and partition table for disk
    df -m /dev/sdX > /tmp/df-pre.out
    parted /dev/sdX p > /tmp/parted-pre.out
    echo' 'un cy
    p
    quit' | parted /dev/sdX > /tmp/parted-cy-pre.out
    # For ADDM, verify that size reported by "Disk Configuration"
    # matches the parted disk size.

Update OS knowledge of disk size
    ls /sys/class/scsi_device
Find directly most closely matching SCSI ID for target disk.
    echo 1 > /sys/class/scsi_device*:A:B/device/rescan
    parted /dev/sdX p  # To interactively see disk size increased
    # For ADDM, verify that size reported by "Disk Configuration"
    # matches the new parted disk size.

Adjust partition table
    umount /dev/sdX8
    umount /dev/sdX9  # All used FS partitions on the /dev/sdX disk
    # If the umounts fail, then stop apps and shells using, then retry
    cat /tmp/parted-cy-pre.out  # To see original settings
    parted /dev/sdX
        (Session to adjust partition #1)
        un cy
        p  (answer "f" at prompt)
        rm 1
        mkpart some_tag ext4 0 100%
        quit
    parted /dev/sdX p > /tmp/parted-post.out
    echo' 'un cy
    p
    quit' | parted /dev/sdX > /tmp/parted-cy-post.out
    diff /tmp/parted-pre.out /tmp/parted-post.out
    diff /tmp/parted-cy-pre.out /tmp/parted-cy-post.out

Grow the partition
    mount /dev/sdX8
    mount /dev/sdX9  # All used FS partitions on the /dev/sdX disk
    # Start apps using these FSes
    # For ADDM, verify that "Disk Configuration" is happy
    resize2fs /dev/sdX8
    df -m /dev/sdX > /tmp/df-post.out
    diff /tmp/df-pre.out /tmp/df-post.out