Verify Fake Storage Capacity (f3probe)

I recently bought some SSDs off AliExpress to test whether their advertised capacity matched real storage.

On Fedora Linux, f3probe is an effective utility for detecting counterfeit flash memory quickly.

See what the estimated disk size is, quickly:

Make sure /dev/sdX is your actual drive. Use lsblk to verify the device identifier:

To thoroughly verify by writing to full capacity and checking integrity:

First, mount the partition:

Then, fill the drive with test files:

Then, verify the written blocks:

The test results will show the true usable capacity versus damaged or ghost sectors.