Section: Maintenance Commands (8)Updated: December 2010Local indexUp
e2freefrag - report free space fragmentation information
is used to report free space fragmentation on ext2/3/4 file systems.
is the filesystem device name (e.g.
program will scan the block bitmap information to check how many free blocks
are present as contiguous and aligned free space. The percentage of contiguous
free blocks of size and of alignment
is reported. It also displays the minimum/maximum/average free chunk size in
the filesystem, along with a histogram of all free chunks. This information
can be used to gauge the level of free space fragmentation in the filesystem.
If a chunk size is specified, then
will print how many free chunks of size
are available in units of kilobytes (Kb). The chunk size must be a
power of two and be larger than filesystem block size.