Libewf and ewf-tools

Libewf is an open source library (for Linux and OSx) that supports reading and writing EWF (Expert Witness Compression Format) formats.

It supports reading media information of EWF files in the SMART (EWF-S01) format and the EnCase (EWF-E01) format. It supports files created by EnCase 1 to 6, linen and FTK Imager. It contains tools to acquire, verify and export EWF files.

The library contains:

  • ewfacquire acquires data in the EWF format.

  • ewfacquirestream acquires data in the EWF format from stdin.

  • ewfdebug supports analysis of EWF files.

  • ewfexport exports data from the EWF format to raw data or another EWF format.

  • ewfinfo gives information about the EWF format.

  • ewfmount can mount an EWF image file.

  • ewfrecover can recover data from corrupt EWF files.

  • ewfverify can verify data stored in the EWF format.

  • libewf-dev and libewf2.

  • python3-libewf contains Python 3 bindings for libewf.


sudo apt install libewf-dev ewf-tools


To acquire a disk image (The -t switch is for destination):

sudo ewfacquire -t /path/to/case /dev/sdm

Any arguments that were not added in the command line, will have to be answered through questions, like segment file size -S, for example to -S 4G. When using the -u flag for unattended mode, all arguments would need to be set at the command line.

Check the result ewfinfo and ewfverify:

ewfinfo /path/to/case.E01
ewfverify /path/to/case.E01

After mounting, tools that do not support EWF can get access to the disk or mounted partitions.

To mount the disk image to provide direct access to the copied disk:

sudo mkdir /mnt/ewf
sudo chown [username] /mnt/ewf
ewfmount //path/to/case.E01 /mnt/ewf
cd /mnt/ewf

The device inside /mnt/ewf is the physical or logical disk image, depending on which source image was made, and the device can be accessed with other tools.