install onto (mdadm/ZFS) RAID 10: no
to use (mdadm/ZFS) RAID 10 as SR: yes, of course!
If someone fails to build, maybe the git-lfs in not properly initialised. To fetch the lfs-files after git clone you can do a git lfs fetch.
weird ... after the second time installing git-lfs and again cloning the repo, it worked...