I installed Arch Linux from arch linux evolution-image to a virtual device. I tested the installation with GRUB MBR and GRUB efi.

I can run grub, but when I select Arch Linux it gives me a

Arch Linux in virutalbox: kernel panic-not syncing: VFS: unable to mount root fs on unknown block(0,0)

What is going wrong?

I installed Arch Linux from arch linux evolution-image to a virtual device. I tested the installation with GRUB MBR and GRUB efi.

Inside virtualbox, I can see the grub menu, but when I select Arch Linux it gives me a

Kernel panic  - not syncing: VFS: unable to mount root fs on unknown block(0,0)

What is going wrong?