I have been using the following with no problems:
url --url http://mirrors.kernel.org/fedora/releases/22/Everything/i386/os/


However, One computer I need to upgrade is in another city and in an area that has power outages on occasion but It has battery backup. During a netinstall, if the power goes out while downloading the packages -- that  would require me to go to the location. So I am trying to use a local OS tree for the install. This will reduce the risk from power outage.

The documentation says the following:

harddrive
Install from a tree or full installation ISO image on a local hard drive. The tree or ISO image must be on a file system which is mountable in the installation environment. Supported file systems are ext2, ext3, ext4, vfat, or xfs.
install
harddrive --partition= | --biospart= [--dir=]
--partition=
Partition to install from (such as sdb2).
--biospart=
BIOS partition to install from (such as 82p2).
--dir=
Directory containing the installation tree or ISO image.


I only have one drive in the computer: /dev/sda.

When I use:

harddrive --partition=/dev/sda2 --dir=/path/os

The target mount points are:
sda1 is mounted as /
sda2 is mounted as /home

The errors are that the drive is not found for install and os tree also fails.

I also tried:

harddrive --partition=sda2 --dir=/path/os


I have not found any other info.

Is there documentation elsewhere that has more details on the use of an OS tree?

Thanks for your help,

David