FILEFRAG(8) System Manager's Manual FILEFRAG(8)
filefrag - report on file fragmentation
SYNOPSIS top
filefrag [ -bblocksize ] [ -BeksvxX ] [ files... ]
DESCRIPTION top
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 top
-B Force the use of the older FIBMAP ioctl instead of the FIEMAP
ioctl for testing purposes.
-bblocksize
Use blocksize in bytes for output instead of the filesystem
blocksize. For compatibility with earlier versions of
filefrag, if blocksize is unspecified it defaults to 1024
bytes.
-e Print output in extent format, even for block-mapped files.
-k Use 1024-byte blocksize for output (identical to '-b 1024').
-s Sync the file before requesting the mapping.
-v Be verbose when checking for file fragmentation.
-x Display mapping of extended attributes.
-X Display extent block numbers in hexadecimal format.
AUTHOR top
filefrag was written by Theodore Ts'o <tytso@mit.edu>.
COLOPHON top
This page is part of the e2fsprogs (utilities for ext2/3/4
filesystems) project. Information about the project can be found at
⟨http://e2fsprogs.sourceforge.net/⟩. It is not known how to report
bugs for this man page; if you know, please send a mail to
man-pages@man7.org. This page was obtained from the project's
upstream Git repository
⟨git://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git⟩ on 2017-07-05.
If you discover any rendering problems in this HTML version of the
page, or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the information
in this COLOPHON (which is not part of the original manual page),
send a mail to man-pages@man7.org