Hard disk drive failure Mac is very serious issue due to which you can lose all your data in your hard drive. Hard drive is an integral part of the Mac system where all the data whether it is multimedia, document and other data are stored. If any thing happens th the hard drive then the data will be in accessible and may be you system will not boot because the operating system is installed in the hard drive itself. There are two type of hard disk drive failure Mac, one is hardware failure and another is logical failure. Hardware failures can not be fixed by you but you can try to fix logical error that are file system corruption, severe virus infection, improper partitioning etc. In certain cases if the system boots then you can use disk utility to fix logical hard disk drive failure Mac and in some cases you have to format it. Don't worry about the data loss as it can be recovered by using Mac data recovery software. Install it on Mac OS X and then scan the hard drive for lost data. You can easily restore it by a simple process and also in a quick time.