Hello everyone I'm having some problem with my MacBook pro after I updated to OS X Mavericks. System got struck and I had to do force shutdown. Later when I tried to start it's just showing screen with symbol and circular progress indicator. Then I was holding command+R to reinstall OS. Then I was asked to erase the disk to Reinstall OS X through internet. Then I restarted, a folder and a question mark on it appeared on screen. Then I clicked on Reinstall OS X, It asked me to select a drive to install OS X but couldn't see any drive available. I was not able to continue from this step!! I read few forums which said it'd be problem with HDD. If it is so do I need to replace HDD with a new one? Which brand should I go for and how much it cost? I require 320GB HDD. Is it problem with HDD or something else? Any other way to fix the existing HDD and proceed?? I checked on Utilities page and couldn't find the Hard Disk now but before I was able to see the option and even erased it. What should I do to get my MacBook Pro in working condition? Help please!! Thanks to all in advance.