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Date:      Wed, 13 May 2020 23:00:47 +0000
From:      bugzilla-noreply@freebsd.org
To:        usb@FreeBSD.org
Subject:   [Bug 244356] Writing to a USB 3.0 stick is very slow
Message-ID:  <bug-244356-19105-GyN0QZEPvn@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-244356-19105@https.bugs.freebsd.org/bugzilla/>
References:  <bug-244356-19105@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D244356

--- Comment #42 from Olivier Certner <olivier.freebsd@free.fr> ---
Created attachment 214466
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D214466&action=
=3Dedit
Stick KT_32G: 1st round of outputs from `usbtest`

With stick KT_32G, I get reliable results. I've only exercized read for now.

In short, I've disabled all negative tests. I also activated Sense on error,
although this seems to have no effect (more tests would be needed to prove =
this
for sure). If I leave "Random" for the I/O size, tests appears to stall from
the start, fails after 10s of seconds and the device is disconnected then
reconnected. If I choose "Increasing", "1 block" or "1024 blocks", tests
complete successfully.

In addition, there is a troubling fact. KT_32G is not recognized on the cas=
e's
front plugs, as reported earlier, but now also one of the MB's hub doesn't
recognize it anymore (it did before, I tested the stick plugged there, see
SD_64G_usbtest_3.txt). The machine has not been rebooted at all since I sta=
rted
testing and collecting data.

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