The current ISO installer is reduced to have minimal interaction. You will
prompted to select location, language and root password. The installer will
pick the first available disk to deploy the the OS. You will create a root
password, but you will be able to create other (administrator) accounts for
SSH and web interface use after first reboot.
Once the installer finished the system will reboot, make sure you remove the
installer and select BIOS to boot from the disk where openmediavault was installed.
You can also start connecting any data drives you previously disconnected
before install or reinstall.
The error Unable to install GRUB in /dev/sda occurs.
In this case execute the following steps:
Select Continue in this window and also on the next which says
Installation step failed.
In the Debian installer main menu (which should have popped up by now),
select Execute a shell and then Continue.
Execute the following commands:
# Chroot.chroot/target# Replace [a-z] with the drive you want to install grub to.# This is normally the drive you've selected to install OpenMediaVault on.grub-install/dev/sd[a-z]# Update GRUB.update-grub# Exit chroot.exit# Exit shell.exit
Select Continue without boot loader in the Debian installer main menu and
then Continue.
It should now continue the installation successfully.