F3 - Fight Flash Fraud - hamis SD kártyák/USB drive-ok tesztelése/felismerése

Nekem új volt és most van két gyanús kártyám :)

Ubuntu repoból egyből telepíthető volt (legalábbis xubuntu :
sudo apt install f3

https://github.com/AltraMayor/f3
f3 - Fight Flash Fraud
f3 is a simple tool that tests flash cards capacity and performance to see if they live up to claimed specifications.
F3 stands for Fight Flash Fraud, or Fight Fake Flash.

Examples

Testing performance with f3read/f3write

Use these two programs in this order. f3write will write large files to your mounted disk and f3read will check if the flash disk contains exactly the written files:

$ ./f3write /media/michel/5EBD-5C80/
$ ./f3read /media/michel/5EBD-5C80/

Please replace "/media/michel/5EBD-5C80/" with the appropriate path. USB devices are mounted in "/Volumes" on Macs.

If you have installed f3read and f3write, you can remove the "./" that is shown before their names.

Quick capacity tests with f3probe

f3probe is the fastest drive test and suitable for large disks because it only writes what's necessary to test the drive. It operates directly on the (unmounted) block device and needs to be run as a privileged user:

# ./f3probe --destructive --time-ops /dev/sdb
Warning

This will destroy any previously stored data on your disk!

Correcting capacity to actual size with f3fix

f3fix creates a partition that fits the actual size of the fake drive. Use f3probe's output to determine the parameters for i3fix:

# ./f3fix --last-sec=16477878 /dev/sdb