The indicatives of the hard drive failure or defect are few and different for varying operating systems. Regardless the number, the impact which they draw on the data is disastrous, the hard drive defect in any case lead to the data loss and hence the need of data recovery. For example, the following error message which occurs in the Linux operating system:

Losing data is the weird situation to handle by any of the user, using any of the operating system. Knowing the fact even, some of the users ignore the fact of backup considering the process as the real chore. But realize later when the data recovery need actually arises.