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blkcalc - Converts between unallocated disk unit numbers and regular
disk unit numbers.
blkcalc [-dsu unit_addr] [-vV] [-i imgtype] [-o
imgoffset] [-b dev_sector_size] [-f fstype] image [images]
creates a disk unit number mapping between two images, one normal and
another that only contains the unallocated units of the first (the default
behavior of the blkls(1)
program). One of the -d, -s, or -u options
must be given. If the -d option is given, then the unit_addr value is the
disk unit address in the regular image (i.e. from dd ). If the unit is unallocated,
its address in an unallocated image is given. If the -u option is given,
then the unit_addr value is the disk unit address in the unallocated unit
image (i.e. from blkls(1)
). Its disk unit address in the original image
is determined. If the -s option is given, then the unit_addr value is the
disk unit address in the slack image (i.e. from blkls -s). The image is the
full, original image (i.e. from dd). blkcalc was called dcalc in TSK versions
prior to 3.0.0.
- -f fstype
- Identify the File System type of the image. Use ’-f
list’ to list the supported file system types. If not given, autodetection
methods are used.
- -i imgtype
- Identify the type of image file, such as raw.
Use ’-i list’ to list the supported types. If not given, autodetection methods
- -o imgoffset
- The sector offset where the file system starts in the
- -b dev_sector_size
- The size, in bytes, of the underlying device sectors.
If not given, the value in the image format is used (if it exists) or
512-bytes is assumed.
- Verbose output to STDERR.
- Display version.
- image [images]
disk or partition image to read, whose format is given with ’-i’. Multiple
image file names can be given if the image is split into multiple segments.
If only one image file is given, and its name is the first in a sequence
(e.g., as indicated by ending in ’.001’), subsequent image segments will be
This is useful when keyword searching an image
generated by blkls. This allows one to identify the original unit address
and provides better documentation.
# blkcalc -u 64 images/wd0e
Brian Carrier <carrier at sleuthkit dot org>
documentation updates to <doc-updates at sleuthkit dot org>
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