[CentOS] Centos 6.6 not booting on Virtualbox on Windows host

Hi,

I downloaded the QuickStart VM from Cloudera that has preinstalled Spark/Hadoop etc. I have been working on that for the last 4-5 weeks and it was running absolutely fine, but recently I had to restart my VM. Since, then the VM does not restart. It shows the loading bar but after that it seems as if it stopped responding. It only shows a small black screen http://i.stack.imgur.com/g4JKZ.png and does not go anywhere from there.

The log http://i.stack.imgur.com/KVYxV.png hangs at Setting up logical volume management : 3 logical volume(s) in volume group "vol group" now active.

I tried logging in using the Single User Mode but still the system hangs at the point.

I don't know what is going wrong?