FILEFRAG(8) System Manager's Manual FILEFRAG(8)
NAME
filefrag - report on file fragmentation
SYNOPSIS
filefrag [ -bblocksize ] [ -BeksvxX ] [ 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.
-bblocksize
Use blocksize in bytes, or with [KMG] suffix, up to 1GB for out-
put instead of the filesystem blocksize. For compatibility with
earlier versions of filefrag, if blocksize is unspecified it de-
faults 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
filefrag was written by Theodore Ts'o <tytso@mit.edu>.
E2fsprogs version 1.45.6 March 2020 FILEFRAG(8)