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>

                                                                                       BLKCALC(1)