Macintosh HD not mounted (I am booting up from my Mac OS X Install DVD)?

[RichardBall]

My Macintosh HD isn't mounted HELP ME!!! I TRY TO MOUNT IT AND IT SAYS TAT I CAN'T MOUNT AND I TRYED VERIFYING AND REPAIRING THE DISK AND IT STILL SAYS CAN'T MOUNT RUN FIRST AID!!! I tried that HELLLLLLP!!!!