defrag.f2fs(8) relocate blocks in a given area to the specified region


defrag.f2fs [ -s start block address ] [ -l number of blocks ] [ -t target block address ] [ -i direction ] [ -d debugging-level ] device


defrag.f2fs is used to move specified number of blocks starting from a given block address to the target block address with a direction. device is the special file corresponding to the device (e.g. /dev/sdXX).

For example, # defrag.f2fs -s 0x4000 -l 0x100 -t 0x10000 -i /dev/sdb1

This moves blocks between 0x4000 and 0x4100 to the left-hand area of 0x10000.

The exit code returned by defrag.f2fs is 0 on success and -1 on failure.


-s start block address
Specify the starting block address.
-l number of blocks
Specifiy the number of blocks to move.
-t target block address
Specify the destination block address.
-i direction
Set the direction to left. If it is not set, the direction becomes right by default.
-d debug-level
Specify the level of debugging options. The default number is 0, which shows basic debugging messages.


This version of defrag.f2fs has been written by Jaegeuk Kim <[email protected]>.


defrag.f2fs is available from git://