Installing system on SataRAID volume

[mrrfh]

Hello,
I'mm trying to install Debian on SataRaid volume created in my ASROCK Z270 Pro4 UEFI.
I'm following this guide https://wiki.debian.org/DebianInstaller/SataRaid
Everything goes fine until point 11 of the guide.

10. Choose the first /dev/dm-? (? is a number). You will get a command prompt.

But I have no /dev/dm- device in the list. If I start console without setting systemrooot, ls /dev/dm* show me /dev/dm-0. Hous of googling gave me nothing.
Can someone help on the issue? Maybe something have changed since the guide was written? Or my ASROCK Z270 Pro4 UEFI not supported?

[p.H]

I'mm trying to install Debian on SataRaid

Why ? fakeRAID sucks, it is strongly advised to not use it if you can avoid it and use native Linux RAID instead.

But I have no /dev/dm- device in the list.

Maybe the fakeRAID device is shown with another (fancy) name. Are there any device names other than the usual /dev/sd*, /dev/mmcblk* or /dev/nvme* ?
How did you partition the fakeRAID device during installation ?

If I start console without setting systemrooot, ls /dev/dm* show me /dev/dm-0

Symlinks with fancier names pointing to /dev/-dm* devices nodes are present in /dev/mapper.
What the rescue mode does is just basically a chroot on the root device. So if you know what the root device is, you can chroot into it from the default shell, mount anything required (/dev, /proc, /sys and anything useful in /etc/fstab) and proceed with the actions.