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Subject: Re: Is here any work on USB Attached SCSI (UAS/UASP) support?
References: <561b3e61-0df2-0eba-24d9-7edf07a7c0ea@FreeBSD.org>
 <ddabe5f5-23a9-0fda-f732-bcc7b66e774b@selasky.org>
To: Hans Petter Selasky <hps@selasky.org>, freebsd-hardware@freebsd.org,
 freebsd-usb@freebsd.org
From: Lev Serebryakov <lev@FreeBSD.org>
Organization: FreeBSD
Message-ID: <96c9e5ed-f35e-d9d1-16ba-b967bec3bdf4@FreeBSD.org>
Date: Fri, 25 Nov 2016 23:30:57 +0300
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On 25.11.2016 17:57, Hans Petter Selasky wrote:

> For Super Speed (USB 3.0) UASP uses streams mode instead of regular bulk
> transfers from what I can see, which is not supported by all XHCI
> controllers.
  Intel's ones? ASMedia's ones? Anyway, UASP is new protocol, but it is
SCSI at its core, so sit should be new transport layer for CAM?

> In USB 2.0 mode it will work using BULK only. Not sure if the vendors
> provide BULK only configurations for USB 3.0.
 Attach 5 disks via one USB2 links is not good idea anyway.

-- 
// Lev Serebryakov