No pool after reboot

[Playfust]

rr 25.7.0 with SA6400 on DSM 7.2 72806 on Hyper-V

forcemount --createpool --auto create the pool /dev/md2 (appear also in fdisk -l)

forcemount --install --md /dev/md2 says 'Install success'

But after rebooting in DSM the pool is not here and no longer appear in fdisk -l

Even tried with raid 0 with 2 disks, linear with 1 disk, every time the pool is created succesfully with the right size but after the reboot the pool dissapear

[xgtcarter]

rr 25.8.0 with SA6400 on DSM 7.2 on Hyper-V
the same result