Thank-you, Michael, for both posts.
I've installed it.
It looks like it will take a while to run, and it's late here now.  So I'll 
give it a try tomorrow.

I gather we don't have a GUI interface available via DNF.

On 2/6/24 8:42 PM, Michael D. Setzer II via users wrote:
site I found didn't seem to have download option, but it is in
Fedora repo

dnf whatprovides f3probe
Last metadata expiration check: 1:04:55 ago on Wed 07 Feb 2024
12:35:47 PM ChST.
f3-8.0-5.fc39.x86_64 : Utility to test for fake flash drives and cards
Repo        : @System
Matched from:
Filename    : /usr/bin/f3probe



On 6 Feb 2024 at 20:21, home user wrote:

Date sent:              Tue, 6 Feb 2024 20:21:02 -0700
To:                     Community support for Fedora users
<[email protected]>
From:                   home user <[email protected]>
Subject:                how to test USB stick capacity.
Send reply to:          Community support for Fedora users
<[email protected]>

Good evening,

background
==========
In the wikipedia article about USB Flash drives, it says 
("https://en.wikipedia.org/wiki/USB_flash_drive#Counterfeit_products";)
------
Counterfeit USB flash drives are sometimes sold with claims of having higher 
capacities than they actually possess. These are typically low-capacity USB 
drives with modified flash memory controller firmware that emulates larger 
capacity drives (for example, a 2 GB drive being marketed as a 64 GB drive). 
When plugged into a computer, they report being the larger capacity they were 
sold as, but when data is written to them, either the write fails, the drive 
freezes up, or it overwrites existing data. Software tools exist to check and 
detect fake USB drives,[46][47] and in some cases it is possible to repair 
these devices to remove the false capacity information and use its real storage 
limit.
------
A footnote leads me to believe that a tool "H2testw" could detect bad sticks 
and maybe fix them.

question
========
I tried man, dnf, and dnfdragora to find H2testw.  Nothing.  I also tried to 
find something else to test and fix sticks.  Nothing.  What do we have for this 
purpose either already installed or that I can get via dnf?
--


+------------------------------------------------------------+
  Michael D. Setzer II - Computer Science Instructor (Retired)
  mailto:[email protected]
  mailto:[email protected]
  mailto:[email protected]
  Guam - Where America's Day Begins
  G4L Disk Imaging Project maintainer
  http://sourceforge.net/projects/g4l/
+------------------------------------------------------------+
--
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