Package f3

Utility to test for fake flash drives and cards

http://oss.digirati.com.br/f3/

F3 is a utility to test for fake flash drives and cards. It is a Free
Software alternative to h2testw. f3write will fill the unused part of
a filesystem with files NNNN.fff with known content, and f3read will
analyze the files to determine whether the contents are corrupted, as
happens with fake flash.

General Commands
Command Description
f3read test real flash memory capacity