12-05-2011
1) from iostat
2) they both the same unit, MBytes
3) bs=2M count=1k
No fs is defined; lv is of type raw. PP size is 2M.
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LEARN ABOUT DEBIAN
blkcat
BLKCAT(1) General Commands Manual BLKCAT(1)
NAME
blkcat - Display the contents of file system data unit in a disk image.
SYNOPSIS
blkcat [-ahswvV] [-f fstype] [-u unit_size] [-i imgtype] [-o imgoffset] [-b dev_sector_size] image [images] unit_addr [num]
DESCRIPTION
blkcat displays num data units (default is one) starting at the unit address unit_addr from image to stdout in different formats (default
is raw). blkcat was called dcat in TSK versions prior to 3.0.0.
ARGUMENTS
-a Display the contents in ASCII
-f fstype
Specify image as a specific file type. If 'swap' is given here, the image will be displayed in pages of size 4096 bytes. If 'raw'
is given, then 512-bytes is used as the default size. The '-u' flag can change the default size. Use '-f list' to list the sup-
ported file system types. If not given, autodetection methods are used.
-h Display the contents in hexdump
-s Display statistics on the image (unit size, file block size, and number of fragments).
-u unit_size
Specify the size of the default data unit for raw, blkls, and swap images.
-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.
-w Display the contents in an HTML table format.
image [images]
One (or more if split) disk or partition images whose format is given with '-i'.
unit_addr
Address of the disk unit to display. The size of a unit on this file system can be determined using the -s option.
num Number of data units to display.
The basic functionality of blkcat can also be achieved using dd. To determine which inode has allocated a given unit, the ifind(1) command
can be used.
EXAMPLES
# blkcat -hw image 264 4
or
# blkcat -hw image 264
SEE ALSO
ifind(1)
AUTHOR
Brian Carrier <carrier at sleuthkit dot org>
Send documentation updates to <doc-updates at sleuthkit dot org>
BLKCAT(1)