BLKCALC(1) General Commands Manual BLKCALC(1)
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 bet-
ter 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)
