Data recovery is the process of retrieving data from corrupted or damaged storage media when it cannot be accessed. The storage media in question will often be a hard disk, but it can also be removable media such as CDs, DVDs, Blu-rays, and USB keys. There are many different reasons why a system administrator may need to use data recovery tools.
At boot up, mainstream Linux distributions perform routine scans to identify and fix any inconsistencies in the file system. A damaged file system might be caused by the computer not shutting down in an orderly fashion, which can occur say in the event of a power cut. However, such routine scans will not detect hardware failure which might exist for a long period without being noticeable to users. Accesses to bad sectors on the media can make the situation worse, and with further usage as well as the passage of time, the media can eventually become unreadable.
As data is a priceless asset for many organizations, you might think it will be necessary to use a professional recovery service. However, these are incredibly expensive. A better strategy is to have a good set of open source software with a plan ready to be implemented if you need to recover the system, and not simply to have made regular backups of data, and saved the partitioning information on the hard disk.
To provide an insight into the quality of software that is available, we have compiled a list of 10 high quality Linux data recovery tools. These tools may well be a life-saver in the event that you need to retrieve data from corrupted media. We would strongly recommend that you become familiar with how they work just in case you are ever put in the position of needing to recover data.
Here’s our recommendations. They are all free and open source.
Let’s explore the 10 data recovery tools at hand. For each title we have compiled its own portal page, a full description with an in-depth analysis of its features, together with links to relevant resources.
|Data Recovery Tools|
|ddrescue||GNU data recovery tool|
|Mondo Rescue||Tool for configuring and maintaining network machines|
|Trinity Rescue Kit||Live distro that aims specifically at recovery and repair operations|
|SystemRescue||System rescue disk|
|TestDisk||Partition scanner and disk recovery tool|
|Finnix||Small, self-contained, bootable CD distro|
|PhotoRec||Digital Picture and File Recovery|
|Rescuezilla||Complete disaster recovery solution|
|Knoppix||Noteworthy for its collection of utilities for system repair|
|safecopy||Copy utility ignoring errors|
Read our complete collection of recommended free and open source software. The collection covers all categories of software.
The software collection forms part of our series of informative articles for Linux enthusiasts. There's tons of in-depth reviews, alternatives to Google, fun things to try, hardware, free programming books and tutorials, and much more.