NAME

       blkcalc - Converts between unallocated disk unit numbers and regular disk unit numbers.

SYNOPSIS

       blkcalc  [-dsu  unit_addr]  [-vV]  [-i  imgtype]  [-o  imgoffset] [-b dev_sector_size] [-f
       fstype] image [images]

DESCRIPTION

       blkcalc 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 are used.

       -o imgoffset
              The sector offset where the file system starts in the image.

       -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.

       -v     Verbose output to STDERR.

       -V     Display version.

       image [images]
              The 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 included
              automatically.

       This is useful when keyword searching an image generated by blkls.   This  allows  one  to
       identify the original unit address and provides better documentation.

EXAMPLE

       # blkcalc -u 64 images/wd0e

SEE ALSO

       blkls(1),

AUTHOR

       Brian Carrier <carrier at sleuthkit dot org>

       Send documentation updates to <doc-updates at sleuthkit dot org>

                                                                                       BLKCALC(1)