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Date:      Mon, 24 Feb 2020 12:38:38 +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-cStzbIPxpJ@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 #4 from Hans Petter Selasky <hselasky@FreeBSD.org> ---
It looks like the SCSI/CAM layer is probing something every 3 seconds and
doesn't get the expected result. It does not look like a device problem.

Can you try to set before plugging the device:

sysctl hw.usb.umass.debug=3D-1

And then collect messages in dmesg?

--HPS

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