From owner-freebsd-scsi@FreeBSD.ORG Fri Jun 13 00:56:51 2008 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 171911065678 for ; Fri, 13 Jun 2008 00:56:51 +0000 (UTC) (envelope-from derekverlee@comcast.net) Received: from QMTA03.westchester.pa.mail.comcast.net (qmta03.westchester.pa.mail.comcast.net [76.96.62.32]) by mx1.freebsd.org (Postfix) with ESMTP id B63788FC13 for ; Fri, 13 Jun 2008 00:56:50 +0000 (UTC) (envelope-from derekverlee@comcast.net) Received: from OMTA10.westchester.pa.mail.comcast.net ([76.96.62.28]) by QMTA03.westchester.pa.mail.comcast.net with comcast id d7Cu1Z04E0cZkys530Fi00; Fri, 13 Jun 2008 00:40:45 +0000 Received: from [141.219.80.99] ([141.219.80.99]) by OMTA10.westchester.pa.mail.comcast.net with comcast id dCga1Z00728a5QV3WCgezw; Fri, 13 Jun 2008 00:40:43 +0000 X-Authority-Analysis: v=1.0 c=1 a=gZ6I5hYjhd49qYEenmQA:9 a=B4HI56zbLqKLbqaLUscA:7 a=SakAO5DjZdgZPzqf-5y7VPlUMEsA:4 a=3SmO1NJXDBsA:10 Message-ID: <4851C202.4030204@comcast.net> Date: Thu, 12 Jun 2008 20:40:34 -0400 From: Derek VerLee User-Agent: Thunderbird 2.0.0.14 (Windows/20080421) MIME-Version: 1.0 To: freebsd-scsi@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: target mode X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Jun 2008 00:56:51 -0000 Hello I'm curious about what is and isn't possible using scsi target mode in FreeBSD, both in principle and given the current state of the architecture. In particular I am curious if it is possible to use a scsi card in target mode, to "export" drives, such as a geom array, to be accessed by another computer over a physical scsi connect. I believe this is what iscsi support aims at, however i'm interested in other scsi interfaces, such as parrellel or perhaps SAS. Searching the archives and web somewhat, I have seen other people ask this a couple times but haven't found a definite answer. This would be to perhaps re-purpose an older computer, or an inexpensive one, to act much like an external raid (but perhaps potentially more flexible). Is is possible now? If not, could it be done with some hacking and coding? How crazy would you have to be to try? _derek