Data recovery is nothing but a process which helps to save the data from damaging, failing, corruption. Data recovery also helps to salvage the data from the inaccessible secondary storage. Mostly the data get recovered from storage media, some of which are: DVDs, hard disk drives, CDs, storage tapes, RAID etc. Recovery may be needed because of logical damage caused in file system or physical damage cause in the storage device. These two problems usually result in failure of host OS, so the whole system will get corrupted.
Failure of the OS is one of the most familiar "data recovery" situation and it usually occurs in a single-partition, single-disk and single operating system. In these cases, the goal of data recovery is very simple as it needs to copy every required file from this corrupted system into another disk.
This problem can be easily carried out using a Live CD, which supplies a way to put on the backup disks or the removable media and system drive, and to transfer the data from the system to the backup media using an optical disc authoring or file manager software. Such dealings can repeatedly be mitigated using disk partitioning, systematically storing valuable files on a special partition from exchangeable operating system files.
Usually data recovery from physically damaged hardware can be done with multiple techniques, such as specialized disk-imaging procedure, and many more. Some damage can be fixed by replacing the damaged parts in the hard disk. Recovering data from logical damage is done with a help of overwritten data, using specialized data recovery software and it also done with the help of internet as it have many free software that help to recover the data.
Online data recovery is considered as one of the most easiest and convenient one because it is very useful to recover the data in almost all failure cases but still it has some minus which makes it less popular when compared with many classic data recovery procedures. Internet connection is very important to use all these online free data recovery software, so it is possible only in place which has a broadband connection. And another minus point in online data recovery software is that it cannot be used in the case of physical damage.