Provided by: f3_7.1-1_amd64
f3write, f3read - test real flash memory capacity
f3write [--start-at=NUM] [--end-at=NUM] <PATH> f3read [--start-at=NUM] [--end-at=NUM] <PATH>
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.h2w, where N is a number (i.e. /[0-9]+/). WARNING: all data on the tested disk might be lost!
--start-at=NUM Initial number of file names. Default value is 1. --end-at=NUM Final number of file names. Default value is "infinity".
To write over a flash drive mounted at /media/TEST: $ f3write /media/TEST To read this flash drive: $ f3read /media/TEST
For detailed information about the F3 tools, see: http://oss.digirati.com.br/f3/
F3 was written by Michel Machado <email@example.com>. This manual page was first written by Joao Eriberto Mota Filho <firstname.lastname@example.org>.