filefrag reports on how badly fragmented a particular file might
be. It makes allowances for indirect blocks for ext2 and ext3
file systems, but can be used on files for any file system.
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.
-B Force the use of the older FIBMAP ioctl instead of the
FIEMAP ioctl for testing purposes.
Use blocksize in bytes, or with [KMG] suffix, up to 1GB
for output instead of the file system blocksize. For
compatibility with earlier versions of filefrag, if
blocksize is unspecified it defaults to 1024 bytes. Since
blocksize is an optional argument, it must be added
without any space after -b.
-e Print output in extent format, even for block-mapped
-E Display the contents of ext4's extent status cache. This
feature is not supported on all kernels, and is only
supported on ext4 file systems.
-k Use 1024-byte blocksize for output (identical to
-P Pre-load the ext4 extent status cache for the file. This
is not supported on all kernels, and is only supported on
ext4 file systems.
-s Sync the file before requesting the mapping.
-v Be verbose when checking for file fragmentation.
-V Print version number of program and library. If given
twice, also print the FIEMAP flags that are understood by
the current version.
-x Display mapping of extended attributes.
-X Display extent block numbers in hexadecimal format.
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
email@example.com. This page was obtained from the project's
upstream Git repository
2023-06-23. (At that time, the date of the most recent commit
that was found in the repository was 2023-05-31.) 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 firstname.lastname@example.org
E2fsprogs version 1.47.0 February 2023 FILEFRAG(8)