blkcalc - Converts between unallocated disk unit numbers and regular
disk unit numbers.
blkcalc [-dsu unit_addr] [-vV] [-i imgtype] [-o imgoffset] [-b
dev_sector_size] [-f fstype] image [images]
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.
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.
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.
The sector offset where the file system starts in the image.
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
# blkcalc -u 64 images/wd0e
Brian Carrier <carrier at sleuthkit dot org>
Send documentation updates to <doc-updates at sleuthkit dot org>