BLKCALC(1)BLKCALC(1)NAMEblkcalc - Converts between unallocated disk unit numbers and regular
disk unit numbers.
SYNOPSISblkcalc [-dsu unit_addr] [-vV] [-i imgtype] [-o imgoffset] [-b dev_sec‐
tor_size] [-f fstype] image [images]
DESCRIPTIONblkcalc creates a disk unit number mapping between two images, one nor‐
mal 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, autodetec‐
tion 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 bet‐
ter documentation.
EXAMPLE
# blkcalc-u 64 images/wd0e
SEE ALSOblkls(1),
AUTHOR
Brian Carrier <carrier at sleuthkit dot org>
Send documentation updates to <doc-updates at sleuthkit dot org>
BLKCALC(1)
