Free data recovery software for linux

Data recovery program for NTFS file systems. Reads each block of the hard disk to and retrieves rebuilds file system tree on another partition.
I wrote this program when one of my friends lost valuable data on an NTFS drive. It been used since then in several cases, but not thoroughly tested, especially not WRT the fact that its a data recovery program.
You should have your partition information stored away in advance. This allows reliable retrieval of file info.
Enhancements:
- Dont exit on error reading source drive
- Fixed core dump when attribute list, but no MFT loaded

The gzip Recovery Toolkit attempts to automate the recovery of data from corrupted gzip files (including tarballs) through a program called gzrecover. gzip Recovery Toolkit package is still very experimental at this point.
99% of "corrupted" gzip archives are caused by transferring the file via FTP in ASCII mode instead of binary mode. Please re-transfer the file in the correct mode first before attempting to recover from a file you believe is corrupted.
This program is provided AS IS with absolutely NO WARRANTY. It is not guaranteed to recover anything from your file, nor is what it does recover guaranteed to be good data. The bigger your file, the more likely that something will be extracted from it. Also keep in mind that this program gets faked out and is likely to "recover" some bad data. Everything should be manually verified.
Usage:
Run gzrecover on a corrupted .gz file. Anything that can be read from the file will be written to a file with the same name, but with a .recovered appended (any .gz is stripped). You can override this with the -o option.
To get a verbose readout of exactly where gzrecover is finding bad bytes, use the -v option to enable verbose mode. This will probably overflow your screen with text so best to redirect output to a file.
Once gzrecover has finished, you will need to manually verify any data recovered as it is quite likely that our output file is corrupt and has some garbage data in it. If your archive is a tarball, read on.
For tarballs, the tar program will choke because GNU tar cannot handle errors in the file format. Fortunately, GNU cpio (tested at version 2.5 or higher) handles corrupted files out of the box.
Heres an example:
$ ls *.gz
my-corrupted-backup.tar.gz
$ gzrecover my-corrupted-backup.tar.gz
$ ls *.recovered
my-corrupted-backup.tar.recovered
$ cpio -F my-corrupted-backup.tar.recovered -i -v
If you have a previous release, please note that the patches to GNU tar have been discontinued. They were only marginally successful at best and GNU cpio does what is needed out of the box and does it far better.
Enhancements:
- Documentation updates, including a man page, plus code cleanup to better enable inclusion in GNU/Linux packages and eliminate compilation warnings.

myrescue is a program to rescue the still-readable data from a damaged harddisk. The project is similiar in purpose to dd_rescue, but it tries to quickly get out of damaged areas to first handle the not yet damaged part of the disk and return later.

Note:

This tools is no replacement for a professional data recovery service! If you do have the latter option, dont even think of using myrescue, as it may further damage your disk. This tool is provided only for the case that you are absolutely desperate and definitely cannot afford a professional data recovery. Or in case you know what you are doing, e.g. if you know that it is the aging of the magnetisation layer that is causing your problem.

The usual GPL disclaimer applies. Especially the NON-WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. Dont blame (or sue) me if it fails to recover or further damages your data.

How it works

The program tries to copy the device blockwise to a file and keeps a table ("block bitmap") noting whether a block has been successfully copied, not yet handled or has had errors. This block bitmap can be used in successive runs to concentrate on the not yet rescued blocks.

The program has a special skip mode to handle read errors. Usually harddisk surface defects cover more than just one block and continuous reading in defect areas can damage the surface, the heads and (by permanent recalibration) the drive mechanics. If this happens, the chances of rescuing the remaining undamaged data drop dramatically. So in skip mode, myrescue tries to get out of damaged areas quickly by exponentially increasing the stepsize. The skipped blocks are marked as unhandled in the block bitmap and can be retried later.

Finally, the program has an option to multiply try to read a block before considering it damaged.

Kryptor is a graphical tool to encrypt files using the algorithm ARCS. Kryptor is also possible to erase files by overwriting data with a pseudo-random sequence of bytes iterated three times, which will make data recovery a very complex operation.

Installation:

The simplest way to compile this package is:

1. `cd to the directory containing the packages source code and type `./configure to configure the package for your system. If youre using `csh on an old version of System V, you might need to type `sh ./configure instead to prevent `csh from trying to execute `configure itself.

Running `configure takes a while. While running, it prints some messages telling which features it is checking for.

2. Type `make to compile the package.

3. Type `make install to install the programs and any data files and documentation.

4. You can remove the program binaries and object files from the source code directory by typing `make clean.

Whats New in This Release:

ï¿1⁄2 Some compiling bugs were fixed.

aB Backup Tools is a toolset for creating and maintaining backups and recoveries of important data on your system.
Enhancements:
- memory leaks fixed,
- options optimized,
- some look changes.

Twisted Storage is an application that will take your data and manage it for you, just like a file system. But Twisted Storage goes way beyond what a normal file system does.
What types of "objects" are stored in Twisted Storage : just regular files. The data stored in the system is expected to be fixed content, meaning it doesnt change at all. If you read the data back, change it, and store it, it is considered a different file. There are plenty of examples of fixed content data : emails you received, movies or mp3 files you made or own, documents you wrote, etc. In fact it is estimated that 80% of the data you have on your computer is fixed, reference data.
Your Twisted Storage system can start out small - a single computer with a few disk drives. When you need more storage you can add more disk drives and more computers. But it has been designed to store petabytes worth of data without requiring any special hardware. For example storing a petabyte worth of data, using the biggest disk drives available today (500 GB), would require 2000 disk drives. To overcome the need of special hardware, Twisted Storage is a scalable, distributed system using ordinary commodity computers. Even so that petabyte of data would require 500 computers networked together and that requires special handling.
Twisted Storage has a few features you wont find in any file system. For example once a file is added to the Twisted Storage repository it can be written in multiple locations simultaneously. The system has been designed to be compliant with Sarbanes-Oxley Act: when an object is added to the repository you can no longer delete it and the integrity of the contents are guaranteed. In addition any access to the object is recorded.
Main features:
Scalable to thousands of servers and multiple petabytes of data.
- Regardless of how much data you want to store,Twisted Storage is designed to handle it. The system can grow from one computer and a few disks to hundreds of systems and thousands of disk drivers.
Automatic data recovery without human intervention.
- Twisted Storage doesnt require backup/restore software or procedures. All data written to the system is recorded in multiple locations.
No special disaster recover procedures.
- So long as you have your systems in physically different locations and you have instructed the software to write the multiple copies to those systems, you have no-hassle disaster recover. If one of the sites goes down, the system will retrieve any data from the other systems. Additionally, once the disaster site is up and running, the system will automatically restore the data to the it.
Simplified configuration.
- To ease management of the system, you can change any one systems configuration and have it ripple through out the system.

Dariks Boot and Nuke is short DBAN is a self-contained boot floppy that securely wipes the hard disks of most computers.
DBAN will automatically and completely delete the contents of any hard disk that it can detect, which makes it an appropriate utility for bulk or emergency data destruction.
Main features:
- Free.
- Fast. Rapid deployment in emergency situations.
- Easy. Start the computer with DBAN and press the ENTER key.
- Safe. Irrecoverable data destruction. Prevents most forensic data recovery techniques.
Enhancements:
- SysLinux 2.13
- Linux 2.4.33
- LZMA 4.32
- uClibc 0.9.20
- Busybox 0.60.5
- Ncurses 5.3
- WinImage 8.0.8000
- dban-1.0.7 was compiled with Debian gcc-3.3 1:3.3.5-13
- This release is compressed with LZMA, which provides much more free space on the floppy disk. LSI MPT and I2O drivers were added.
- Thanks go to Igor Sobrado for reporting the "5220.22-M" typo.
- Thanks go to Dorina Lanza for reporting a block adjustment error.

Bacula is a set of computer programs that permit you (or the system administrator) to manage backup, recovery, and verification of computer data across a network of computers of different kinds.

In technical terms, it is a network based backup program.

Bacula is relatively easy to use and efficient, while offering many advanced storage management features that make it easy to find and recover lost or damaged files.

Most of the Bacula source code has been released under a slightly modified version of the GPL version 2 license. If you wish additional details, please follow the License link to your left.