P2V of a debian stretch, RAID1 (md) troubles.

I'm doing a P2V of a debian stretch server, using testing repository:

	deb http://ftp.mondorescue.org/test/debian 9 contrib

i can create the .iso without troubles and boot on proxmox, but when i
try to use it i stop on partition phase.

In partition screen i can see all the old phisical partition (mdX and
sdaX/sdbX), i can delete the mdX ones but i cannot delete the sdaX/sdbX
ones, getting as an error:

	Cannot delete /dev/sda8: it is in use
	by RAID device /dev/md122

Some notes:

+ my old md devices was md0-md5

+ on the booted mondo media, /etc/mdadm/mdadm.conf list correctly my
  old md devices

+ cat /proc/mdstat list NO md devices currently active


someone can help me? Thanks.

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