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ewfacquirestream LOCAL ewfacquirestream


ewfacquirestreamacquires data in the EWF format from stdin


ewfacquirestream [-A codepage] [-b number_of_sectors] [-B number_of_bytes] [-c compression_values] [-C case_number] [-d digest_type] [-D description] [-e examiner_name] [-E evidence_number] [-f format] [-l log_filename] [-m media_type] [-M media_flags] [-N notes] [-o offset] [-p process_buffer_size] [-P bytes_per_sector] [-S segment_file_size] [-t target] [-2 secondary_target] [-hqsvVx]


ewfacquirestream is a utility to acquire media data from stdin and store it in EWF format (Expert Witness Format). ewfacquirestream acquires media data in a format equivalent to EnCase and FTK imager, including meta data. Under Linux, FreeBSD, NetBSD, OpenBSD, MacOS-X/Darwin

ewfacquirestream is part of the libewf package. libewf is a library to access the Expert Witness Compression Format (EWF).

The options are as follows:

the codepage of header section, options: ascii (default), windows-874, windows-932, windows-936, windows-949, windows-950, windows-1250, windows-1251, windows-1252, windows-1253, windows-1254, windows-1255, windows-1256, windows-1257 or windows-1258
the number of sectors to read at once (per chunk), options: 16, 32, 64 (default), 128, 256, 512, 1024, 2048, 4096, 8192, 16384 or 32768
the number of bytes to acquire
specify the compression values as: level or method:level compression method options: deflate (default), bzip2 (bzip2 is only supported by EWF2 formats) compression level options: none (default), empty-block, fast or best
the case number (default is case_number)
calculate additional digest (hash) types besides md5, options: sha1, sha256
the description (default is description)
the examiner name (default is examiner_name)
the evidence number (default is evidence_number)
the EWF file format to write to, options: ftk, encase2, encase3, encase4, encase5, encase6 (default), encase7, linen5, linen6, linen7, ewfx. libewf does not support streamed writes for other EWF formats.
shows this help
logs acquiry errors and the digest (hash) to the log filename
the media type, options: fixed (default), removable, optical, memory
the media flags, options: logical, physical (default)
the notes (default is notes)
the offset to start to acquire (default is 0)
the process buffer size (default is the chunk size)
the number of bytes per sector (default is 512)
quiet shows minimal status information
swap byte pairs of the media data (from AB to BA) (use this for big to little endian conversion and vice versa)
the segment file size in bytes (default is 1.4 GiB) (minimum is 1.0 MiB, maximum is 7.9 EiB for encase6 and encase7 format and 1.9 GiB for other formats)
the target file (without extension) to write to (default is image)
verbose output to stderr
print version
use the chunk data instead of the buffered read and write functions.
the secondary target file (without extension) to write to

ewfacquirestream will read from stding until it encounters a read error. On read error it will stop no error information is stored in the EWF file(s).

Empty block compression detects blocks of sectors with entirely the same byte data and compresses them using the default compression level.






# ewfacquirestream -C 1 -D Floppy -E 1.1 -e 'John D.' -N 'Just a floppy in my system' -m removable -M logical -t floppy </dev/fd0
ewfacquirestream 20120805

Using the following acquiry parameters:
Image path and filename:		floppy.E01
Case number:				1
Description:				Floppy
Evidence number:			1.1
Examiner name:				John D.
Notes:					Just a floppy in my system
Media type:				removable
Volume type:				logical
EWF file format:			EnCase 5
Compression method:			deflate
Compression level:			none
Acquiry start offet:			0
Number of bytes to acquire:		0 (until end of input)
Evidence segment file size:		1.4 GiB (1572864000 bytes)
Block size:				64 sectors
Error granularity:			64 sectors
Retries on read error:			2

Acquiry started at: Sun Aug  5 11:32:41 2012

This could take a while.

Status: acquired 1.4 MiB (1474560 bytes)
        in 1 second(s) with 1 MiB/s (1474560 bytes/second).

Acquiry completed at: Sun Aug  5 11:32:42 2012

Written: 1.4 MiB (1474560 bytes) in 1 second(s) with 1 MiB/s (1474560 bytes/second).

MD5 hash calculated over data:		ae1ce8f5ac079d3ee93f97fe3792bda3


Errors, verbose and debug output are printed to stderr when verbose output -v is enabled. Verbose and debug output are only printed when enabled at compilation.


Please report bugs of any kind on the project issue tracker:


These man pages were written by Joachim Metz.


Copyright 2006-2014, Joachim Metz <>.

This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


ewfacquire(1), ewfexport(1), ewfinfo(1), ewfmount(1), ewfrecover(1), ewfverify(1)

January 19, 2014 libewf