filefrag
report on file fragmentation
Synopsis
filefrag
[ -Bbsvx ] [ files... ]
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examples
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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[:at:]mit[:dot:]edu>.