This is the problem which failed booting after installation as below
Near the end of the installation, default location of grub-installation is /dev/md127p1.
and I changed default to /dev/md/Volume0_0
After that, it doesn't have a problem to boot and no '_' prompot.
This is the problem which failed booting after installation as below
Near the end of the installation, default location of grub-installation is /dev/md127p1.
and I changed default to /dev/md/Volume0_0
After that, it doesn't have a problem to boot and no '_' prompot.