From owner-freebsd-current@FreeBSD.ORG  Fri Feb 10 01:42:25 2012
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From: Hans Petter Selasky <hselasky@c2i.net>
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Date: Fri, 10 Feb 2012 02:40:30 +0100
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Cc: "Sam Fourman Jr." <sfourman@gmail.com>
Subject: Re: USB3 and a Seagate FA GoFlex
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On Friday 10 February 2012 01:22:53 Sam Fourman Jr. wrote:
> hello list,
> 
> I bought a new Seagate FA GoFlex USB3 removable disk running FreeBSD 10.x
> CURRENT this disk functions correctly on a USB 2.0 port (I can use zpool
> create to create a ZFS pool)
> however when attached to a USB 3.0 port it does not function correctly when
> attempting to create a zpool i get
> 
> *AutoSense failed*
> 
> this happens across 3 separate computers all running FreeBSD while booting
> from a usb stick attached to da0 i enabled USB_DEBUG in the kernel
> 
> any ideas?

usbconfig dump_quirk_names


Try to add the no sync cache quirk for your disk.

Could you show dmesg w/o usb.debug enabled?

--HPS