Data recovery means retrieving of lost, deleted, unusable or inaccessible data that have been lost for various reasons. It is not just for restoring of lost data and files, but also for restoration of corrupted files or data. There are many reasons that can cause a data loss like software, hardware, intended or maybe unintended, these factors can cause data loss. Out of these reasons there are mainly two main reasons that is the software and the hardware reason.
- Software reasons have various aspects like virus, mispartition, power cut during the operation and password lost etc. Computer viruses are the programmed which are made to destroy the data or to erase them.
- Hardware reasons like bad sector in hard disk, power cut , circuit damage etc and whenever the hardware has a problem , you will find the slowdown of the system and as a result you cannot operate it easily and successfully which is a result of physical bad track failure.
The most distinct feature of difference between both of them is that whether the memory medium itself can be normally accessed or replacing of different parts.
Now the main thing that comes is how to prevent data loss, so some preventive measures can be taken like,
- Don’t upgrade hardware or software without having a proper backup.
- Physically securing your system from others.
- Firewalls and virus protection to be used.
Now once the data is lost, there are some technique to recover it like, Use of software to recover data and use of machines to recover data.
Software Data Extraction –
Data extraction is the process of moving the data of the image of the drive taken to another destination. Data extraction software scans areas of hard drives and restores file systems to memory or other hard drives. Software can be used to copy retrievable data to destination.
And to recover data, scanning probe microscopy comes under the use of machines, a technique that is used for the image and measures surfaces at atomic level, magnetic force microscopy mfm (magnetic force microscopy) is a new technology that allows images but the spatial variation of magnetic forces depicts. Scanning tunneling Microscopy PST (Scanning tunneling microscopy) is a recent change of MFM, which usually uses the probe tip created by placing the nickel on the pre-patterned surface.