My mac won't start up, it is always stuck on the Silver apple screen with a loading wheel. I need the files inside the mac. I tried: 1) tried using installer disc to boot my drive, but it keeps on spitting the disc out. 2) Command-Option-P-R Reset Parameter RAM (PRAM) and non-volatile RAM (NVRAM) when booting 3) got the following error in verbose mode: disk0s2: 0xe0030005(undefined) and then keeps returning, 'could not create "file system unmounted" notification'. Anyone has a suggestion to solve the problem?