Kernel panic - not syncing: VFS: Unable to mount root fs on unknow-block(0,0)
Kernel Offser: 0x0 from 0x80200000 (relocation range: 0x800000000-0xf7ffdfff)
---[ end Kernel panic - not syncing: VFS: unable to mount root fs on unknown-block(0,0)
I restored to a virtual machine backup and it's okay again. By running the command "update-initrd -l" it causes this behaviour any ideas why this is happening?