I cloned and enlarged an existing virtual CentOS-6 disk by the following steps:
- Create 15GB virtual disk and mount the old and the new disks in GParted.
- In GParted copy boot, swap and ext3 partitions from the old disk to the new one.
- Mark the new boot partition with boot flag.
- Resize the new ext3 to bigger size.
I disconnected the old disk and connected the new one. Now I cannot boot the VirtualBox. I get a black screen. What seems to be the problem here?