You can clone partitions on a Jetson. If the partition is the root partition then you can loopback mount this, edit this, and then use the flash app to flash using this image rather than creating a new image. See:
[url]https://devtalk.nvidia.com/default/topic/898999/jetson-tx1/tx1-r23-1-new-flash-structure-how-to-clone-/post/4784149/#4784149[/url]
This URL is for a TK1, but most of the concept applies to a TX1:
[url]http://elinux.org/Jetson/Cloning[/url]
Note that an image intended for a particular release (such as R24.2) may require the Jetson to have been flashed once with that release before the root partition is compatible. I mention this because running the flash.sh script takes care of this when naming the “-r” re-use option, but if you directly run some of the tools to flash only a single partition and the other parts are from different releases you might have issues.
The cloned partition is loopback mountable as ext4. This can be edited before flashing with re-use and the edits will carry forward into the restored clone.