Input/output error during dev/hda

[twright]

OK, So I'm very new to linux and I have to use fedora for one of my university modules.

 

Here's the scenario

 

I am using virtual box to install(or try to install) fedora core 2. when I get to disk partitioning it tells me something like : input/output error cannot write to dev/hda.... which is where I get stuck, any help on this.. I have set aside 8gb of fixed disk space for the virtual machine.