Hello, my name is Tomas. So today i am facing first ever problem with mac, and i need your help guys. Yesterday my mac just stopped working. The rainbow ball was just spinning all the time and thats it. When i tried to restart it by holding power button for few seconds, it did not boot. It keep sticking apple logo in grey background. So i put mac os cd and tried to repair hdd: Volume bitmap needs minor repair for under-allocation Checking volume information. Volume header needs minor repair. Repairing volume. Rechecking volume. Checking Journaled HFS Plus volume. Invalid extent entry. ....... Can't repair this disc....... Reformat the disk.. As i do not really care about the data that is on this hdd i tried to erase it, and this is what i got: File system formatter failed Or: POSIX reports: The operation couldn't be completed. Cannot allocate memory. Can someone please help me with this? I really need to use this computer. Thank You for your help.