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Linux 2.6 - man page for filefrag (linux section 8)

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FILEFRAG(8)									      FILEFRAG(8)

NAME
       filefrag - report on file fragmentation

SYNOPSIS
       filefrag [ -Bbsvx ] [ files...  ]

DESCRIPTION
       filefrag  reports on how badly fragmented a particular file might be.  It makes allowances
       for indirect blocks for ext2 and ext3 filesystems, but  can  be	used  on  files  for  any
       filesystem.

       The  filefrag  program initially attempts to get the extent information using FIEMAP ioctl
       which is more efficient and faster.  If FIEMAP is not supported then  filefrag  will  fall
       back to using FIBMAP.

OPTIONS
       -B     Force  the  use  of  the older FIBMAP ioctl instead of the FIEMAP ioctl for testing
	      purposes.

       -b     Use 1024 byte blocksize for the output.

       -s     Sync the file before requesting the mapping.

       -v     Be verbose when checking for file fragmentation.

       -x     Display mapping of extended attributes.

AUTHOR
       filefrag was written by Theodore Ts'o <tytso@mit.edu>.

E2fsprogs version 1.41.14		  December 2010 			      FILEFRAG(8)
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