@george1421 I’ve tested partclone over NFS to m.2 under Ubuntu 18.04 now.
The exact same issue is happening there with partclone.
I ran partclone.restore to /dev/null, from the FOG NFS images share to get a non-writing baseline of network performance, and it showed 6.8GB/min.
Then I ran partclone.restore to the m.2 drive, and it started at 14GB/min, and by 4% it was down to 2GB/min. By 50% it was down to 450MB/min.
The /var/log/partclone.log showed multiple writes per buffer, like I outlined in another post.
I guess it’s time for me to post in the partclone forums?