This is the command f3write that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
f3write, f3read - test real flash memory capacity
SYNOPSIS
f3write [--start-at=NUM] [--end-at=NUM] <PATH>
f3read [--start-at=NUM] [--end-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.h2w,
where N is a number (i.e. /[0-9]+/).
WARNING: all data on the tested disk might be lost!
OPTIONS
--start-at=NUM
Initial number of file names. Default value is 1.
--end-at=NUM
Final number of file names. Default value is "infinity".
EXAMPLE
To write over a flash drive mounted at /media/TEST:
$ f3write /media/TEST
To read this flash drive:
$ f3read /media/TEST
Use f3write online using onworks.net services