How to Fix corrupt hard disk of PS3?

Ps3 hard disk gets over heated or gets very old and starts getting weak and finally corrupts,some cases gets faulty due to moisture getting into it.
There are many other reasons for hard disk getting corrupted.
Basically in most of the cases this fix helps, in some cases the hard disk needs to be replaced,thats the only option.

Put your PS3 in Standby Mode. 
The first thing your going to want to know is your model number. It can be found on the back panel of the PS3 on the serial number label, and it will begin with CECH. Example - Serial: XXXXXXXXXXXX-CECHXXX - 
For models: CECHA01, BO1, E01, E01MG, G01, H01, H01MG, K01, LO1, AND P01, it will have a power switch on the back. Flip it off then back on and you will have a solid red indicator light on the front. 
For models: CECH-2001A and 2001B, press the power button on the front until the indicator light turns red. If all else fails unplug the power cord and plug it back in. 
Time to enter Safe Mode. 
Press and hold your finger over the power button on the front until you hear three beeps and the indicator light goes back to red. Then release the button. (The second you touch it you will hear a beep, that's the first beep. Five seconds later a second beep, another five seconds the third and final beep will sound then the indicator light will return to red.) 
Press and hold your finger over the power button again until you hear a quick double beep. The release the button. (The second you touch it you will hear a beep, that's the first beep. Five seconds later a second beep, another five seconds you will hear the double beep.) 

Connect controller to PS3 screen. You will then see a screen. "Connect the controller with the USB cable, then press the PS button". 
Connect the USB cable to the USB port on the front of your PS3 and the top of your game controller, (between the left and right bumpers). Then Press the PS button in the center of the controller. 

Safe Mode options screen. Connect controller to PS3 screen. You will then see this screen. Safe Mode options screen 
-REMINDER: -BY DOING THE FOLLOWING ALL OF YOUR DATA ON YOUR PS3 WILL BE LOST, YOUR ONLINE STATS ARE ON THE NETWORK SO YOU WILL GET THAT STUFF BACK, INCLUDING GAMES AND ADDONS YOU BOUGHT FROM THE PSN.- 
Select option number 5. (Restore PS3 System). Then select yes to perform step. 

You will then see this screen. "The hard disk's file system is corrupt and will be restored." 
The PS3 will then restart. You will see many different languages, all that is is saying is, "Connect the controller with the USB cable, then press the PS button". Press the PS button and set your settings when it finishes it will start up and its fixed.
This procedure works in most cases,but sometimes this procedure is not helpful.In that cases ps3 hard disk needs to be replaced or new ps3 is advisable.


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EMachine Factory Restore?

In Factory restore procedure,you will loose all your unsaved files and folders.

Back up all of your photos, documents, folders, files, favorites (bookmarks) and anything else you would like to keep and reinstall after the system recovery. Use a CD, DVD, flash drive, MP3 or external hard drive to store your data temporarily.
Click on the "System Recovery" icon (usually found within the start menu) and begin the process by following the on-screen prompts.
Click on "restore" and note the warnings about losing all of your data. Wait for the computer to complete the process of erasing the hard drive and creating a new partition.
Insert the emachines recovery disk in the CD tray when prompted. This will start the process. There are usually one or two disks involved and the computer will let you know which ones to insert when and will even eject the tray automatically in most cases. You may have to restart at least three times, do not be alarmed by this and keep the disk in until you are prompted otherwise.
Example of Windows Installation Install Windows on the new partition and follow the prompts on your screen. Be sure to choose the largest partition, the one with the most kb available. There are usually two to choose from, as you have deleted the other ones in the steps prior.
Reinstall all of your backed up data and any software programs you are currently using, including the printer and Internet, if needed. Be sure all of your drivers and hardware is working properly, as they have been reinstalled as well during the recovery process.