NAME

       f3write, f3read - test real flash memory capacity

SYNOPSIS

       f3write [--start-at=NUM] <PATH>
       f3read  [--start-at=NUM] <PATH>

DESCRIPTION

       F3  (Fight  Flash  Fraud or Fight Fake Flash) tests the full capacity of a flash card (flash drive, flash
       disk, pendrive). It writes to the card and then checks if can read it. It will assure  you  haven't  been
       sold a card with a smaller capacity than stated.

       When writing to flash drive, f3write fills the filesystem with 1GB files named N.fff, where N is a number
       (i.e. /[0-9]+/).

       WARNING: all data on the tested disk will be lost!!!

OPTIONS

       --start-at=NUM
              Initial number to files names. Default value is 1.

EXAMPLE

       To write over a flash drive mounted at /media/TEST:

             $ f3write /media/TEST

       To read this flash drive:

             $ f3read /media/TEST

AUTHOR

       f3 was written by Digirati <michael@digirati.com.br>.  This manual page was written by Joao Eriberto Mota
       Filho <eriberto@eriberto.pro.br> for the Debian project (but may be used by others).

F3 2.2                                              May 2013                                               F3(1)