inaccessible HD

hello again and thankyou for the reply.ok now i checked under device manager and says the device is working fine,i also looked under event viewer/log and listed there is alot of red x (next to it >error )..and the log time is about the same time my HD became inaccessible.i clicked properties,and says that >this device has a bad block of memoy,which windows attempted to read,the data might be missing or corrupted< which is what i think happened.i simply ran outta HD space and the DL's had no place to store?? doea this mean everthing is lost?? its a 120GB maxtor less than 2yrs old. sincerely