From owner-freebsd-questions@FreeBSD.ORG Thu Oct 20 17:06:03 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D30AF10656F0 for ; Thu, 20 Oct 2011 17:06:03 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from asmtpout020.mac.com (asmtpout020.mac.com [17.148.16.95]) by mx1.freebsd.org (Postfix) with ESMTP id B77A78FC18 for ; Thu, 20 Oct 2011 17:06:03 +0000 (UTC) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; CHARSET=US-ASCII Received: from cswiger1.apple.com ([17.209.4.71]) by asmtp020.mac.com (Oracle Communications Messaging Server 7u4-23.01 (7.0.4.23.0) 64bit (built Aug 10 2011)) with ESMTPSA id <0LTD0027OJHO6360@asmtp020.mac.com> for freebsd-questions@freebsd.org; Thu, 20 Oct 2011 10:05:48 -0700 (PDT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.4.6813,1.0.211,0.0.0000 definitions=2011-10-20_08:2011-10-20, 2011-10-20, 1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 suspectscore=0 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=6.0.2-1012030000 definitions=main-1110200183 From: Chuck Swiger In-reply-to: <4EA05363.5010808@my.gd> Date: Thu, 20 Oct 2011 10:05:47 -0700 Message-id: References: <20111019141443.GQ4592@pcjas.obspm.fr> <20111020094913.GC83424@pcjas.obspm.fr> <4E9FF072.6030104@my.gd> <9B27B4D4-69C8-482A-A918-F77FD03614E3@mac.com> <4EA05363.5010808@my.gd> To: Damien Fleuriot X-Mailer: Apple Mail (2.1084) Cc: freebsd-questions@freebsd.org Subject: Re: [zfs-discuss] ZFS on Dell with FreeBSD X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Oct 2011 17:06:03 -0000 On Oct 20, 2011, at 9:59 AM, Damien Fleuriot wrote: >> SAS is "serial attached SCSI"; it permits multipath connections to devices and thus is more similar to fibre channel HBAs than SATA, although some SAS controllers will also work with normal SATA drives. > > I know what SAS stands for. OK. > My question was, what do they mean by *external* controller ? It means the connections to the devices are external, rather than being intended for internal devices: http://www.dell.com/content/topics/topic.aspx/global/products/pvaul/topics/en/us/raid_controller?c=us&l=en&cs=555 > Do you get to provide your own ? Devices? Yes. Regards, -- -Chuck