f3: f3 (Fight Flash Fraud) f3: f3: F3 is an open source Linux software to test flash memory capacity. f3: f3: F3 is composed of two binaries: f3write, and f3read. f3write fills a f3: file system up with 1GB files named NNNN.fff, where N is a number, f3: whereas, f3read validates those files. If the content of all NNNN.fff f3: files is valid, the memory is fine. The last file may be less than f3: 1GB since f3write takes all available space for data. f3: f3: Project URL: http://oss.digirati.com.br/f3/