On Sat, 15 Aug 2020 at 11:00, Dan Kenigsberg <danken@xxxxxxxxxxxxxxxxx> wrote:
> USB3 ports on the newer machine versus USB2 on the older machine?
>
> Does your USB stick claim to be USB3? Is it a reputable brand? Some
> early USB3 sticks were dodgy. USB3 signaling needs more careful RF design
> (lengths and routing of circuit traces and wiring) due to higher
> frequencies so slapping a new chip into a USB2 design without proper
> preparation may result in PPP (p*** poor performance).
Thanks!
I was using a somewhat fancy SanDisk Cruzer Glide 3.0.
Glad you got past the problem.
There is something funny about that model. Amazon reviews report
highly variable speeds and some devices don't recognize it. One
suggestion was that SanDisk Cruzer Glide 3.0. power draw was
above spec.
Due to your advice I used an older USB2-only stick which worked ok.
I would not hurry to blame the new stick. Maybe the P1 circuitry, or the Fedora USB3 driver are the dodgy ones?
Lots of Fedora systems (this one included) rely on USB3 external drives and don't have problems.
--
George N. White III
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