Registered: Apr 2010
Location: Continental USA
Distribution: Debian, Ubuntu, Fedora, RedHat, DSL, Puppy, CentOS, Knoppix, Mint-DE, Sparky, Vsido, tinycore, Q4OS
More critical information
You might also want to mention what FTP server you are running, what kernel (uname -a output), what filesystem is involved (EXT2, EXT3, EXT4, XFS, JFS, etc) that might help us identify possible factors of interest.