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scan_lfs(8) [netbsd man page]

SCAN_FFS(8)						    BSD System Manager's Manual 					       SCAN_FFS(8)

NAME

     scan_ffs, scan_lfs -- find FFSv1/FFSv2/LFS partitions on a disk or file

SYNOPSIS

     scan_ffs [-blv] [-e end] [-F file] [-s start] device

DESCRIPTION

     scan_ffs will take a raw disk device that covers the whole disk or a file and will find all possible FFSv[12]/LFS partitions, independent of
     block sizes on it.  It will show the file system type (FFSv1, FFSv2, or LFS), size, and offset.  Also it has an option to show the values
     with a disklabel-alike output.

     The options are as follows:

     -b 	  Report every superblock found with its sector address, rather than trying to report the partition boundaries.  This option can
		  be useful to find the other superblocks in a partition if the first superblock has become corrupted.	It is most useful if
		  device refers to the raw device for the partition, rather than the entire disk.

     -e end	  Where to stop searching for file systems.  The end argument specifies the last sector that will be searched.	Default is the
		  last sector of device.

     -F file	  Path to a file containing possible partitions inside of it.

     -l 	  Print out a string looking much like the input to disklabel.	With a little massaging, this output can usually be used by
		  disklabel(8).

     -s start	  Where to start searching for file systems.  This makes it easier to skip swap partitions or other large non-UFS/FFS partitions.
		  The start argument specifies the first sector that will be searched.	Default is the first sector of device.

     -v 	  Be verbose about what scan_ffs is doing, and what has been found.

     The device argument specifies which device scan_ffs should scan for file systems.

     scan_lfs is just another name for the same program, both behave in exactly the same way.

SEE ALSO

     disklabel(8)

HISTORY

     The scan_ffs program first appeared in OpenBSD 2.3 and then in NetBSD 3.1.  Support for searching in files was added in NetBSD 4.0.

AUTHORS

     scan_ffs was written for OpenBSD by Niklas Hallqvist and Tobias Weingartner.  It was ported to NetBSD by Juan Romero Pardines, who added sup-
     port for LFS/FFSv2, partitions with fragsize/blocksize greater than 2048/16384 for FFSv1, searching on files, etc.

BUGS

     Currently scan_ffs won't find partitions with fragsize/blocksize greater than 8192/65536.

BSD
								    May 1, 2007 							       BSD

Check Out this Related Man Page

scrounge-ntfs(8)					    BSD System Manager's Manual 					  scrounge-ntfs(8)

NAME

     scrounge-ntfs -- helps retrieve data from corrupted NTFS partitions

SYNOPSIS

     scrounge-ntfs -l disk
     scrounge-ntfs -s disk
     scrounge-ntfs [-m mftoffset] [-c clustersize] [-o outdir] disk start end

DESCRIPTION

     scrounge-ntfs is a utility that can rescue data from corrupted NTFS partitions. It writes the files retrieved to another working file system.
     Certain information about the partition needs to be known in advance.

     The -l mode is meant to be run in advance of the data corruption, with the output stored away in a file. This allows scrounge-ntfs to recover
     data reliably. See the 'NOTES' section below for recover info when this isn't the case.

OPTIONS

     The options are as follows:

     -c 	 The cluster size (in sectors). When not specified a default of 8 is used.

     -l 	 List partition information for a drive. This will only work when the partition table for the given drive is intact.

     -m 	 When recovering data this specifies the location of the MFT from the beginning of the partition (in sectors). If not specified
		 then no directory information can be used, that is, all rescued files will be written to the same directory.

     -o 	 Directory to put rescued files in. If not specified then files will be placed in the current directory.

     -s 	 Search disk for partition information. (Not implemented yet).

     disk	 The raw device used to access the disk which contains the NTFS partition to rescue files from. eg: '/dev/hdc'

     start	 The beginning of the NTFS partition (in sectors).

     end	 The end of the NTFS partition (in sectors)

NOTES

     If you plan on using this program sucessfully you should prepare in advance by storing a copy of the partition information. Use the -l option
     to do this. Eventually searching for disk partition information will be implemented, which will solve this problem.

     When only one partition exists on a disk or you want to rescue the first partition there are ways to guess at the sector sizes and MFT loca-
     tion. See the scrounge-ntfs web page for more info:

     http://memberwebs.com/swalter/software/scrounge/

AUTHOR

     Stef Walter <stef@memberwebs.com>

scrounge-ntfs							   June 1, 2019 						     scrounge-ntfs
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