Section: Maintenance Commands (8)
Updated: August 2014
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.
- Force the use of the older FIBMAP ioctl instead of the FIEMAP ioctl for testing purposes.:
- 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.:
- Print output in extent format, even for block-mapped files.:
- Use 1024-byte blocksize for output (identical to '-b 1024').:
- Sync the file before requesting the mapping.:
- Be verbose when checking for file fragmentation.:
- Display mapping of extended attributes.:
- Display extent block numbers in hexadecimal format.:
filefrag was written by Theodore Ts'o <[email protected]>.