I have problems with my HDD. I tried to reinstall OS but My Windows 7 installer alerted something like "cannot write on disk without driver" while it was deleting existing partitions. Since that my Ubuntu live hangs on load screen (several "running" dots, not matter if I choose "Try", "Install" or "Check disk"), Windows installer errors kind of "disk is damaged or badly connected, try to check your cables". Usual boot from hard drive gives "no such partition".
How do I restore HDD's operability? Losing all the information is ok.