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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 or split.  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.

       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>