Can't erase a partition : Error Input/Output

[heidan]

Hello everybody
I just tried to install Mac OS X Zephyroth on my computer but the only problem i've got is to erase a partition to install OS X. It is telling me : error input output or something like that. i tried many kind of partitions like : Fat 32, HFS+, NTFS, ext2 and 3 etc but i can't install without erase them before. What can I do to resolve the input output problem ?

sorry for my bad english