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)