From owner-freebsd-fs@freebsd.org Mon Aug 22 16:30:26 2016 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 771C7BC2C7A for ; Mon, 22 Aug 2016 16:30:26 +0000 (UTC) (envelope-from marck@rinet.ru) Received: from woozle.rinet.ru (woozle.rinet.ru [195.54.192.68]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 0DF031EA5 for ; Mon, 22 Aug 2016 16:30:25 +0000 (UTC) (envelope-from marck@rinet.ru) Received: from localhost (localhost [127.0.0.1]) by woozle.rinet.ru (8.14.5/8.14.5) with ESMTP id u7MGUJ0Z082983; Mon, 22 Aug 2016 19:30:19 +0300 (MSK) (envelope-from marck@rinet.ru) Date: Mon, 22 Aug 2016 19:30:19 +0300 (MSK) From: Dmitry Morozovsky To: Karl Denninger cc: freebsd-fs@freebsd.org Subject: Re: Recommended HBA for ZFS, contemporary In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (BSF 1167 2008-08-23) X-NCC-RegID: ru.rinet X-OpenPGP-Key-ID: 6B691B03 MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (woozle.rinet.ru [0.0.0.0]); Mon, 22 Aug 2016 19:30:19 +0300 (MSK) X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 22 Aug 2016 16:30:26 -0000 Karl, On Mon, 22 Aug 2016, Karl Denninger wrote: > I'm still a fan of the LSI SAS-9211 cards along with (for higher > density) a SAS port expander. I've been extremely happy with this > combination with one caveat -- most systems must boot from the actual > card and not a port on the expander(s) you connect to it due to BIOS > constraints. They're also crazily cost-effective on-balance. > > In practice this means you have 4 ports on the base card available (2 > used for mirrored boot drives, 2 for other things) and the rest of the > disks go on the expander, or you run more than one card. > > Whether you can actually saturate this combination depends on what you > attach. In large configurations, especially those stuffed with SSDs, > you can -- at which point something faster such as the 93xx series which which immediately leads me to the question: what is the driver supporting 9300 in HBA mode? Quick googling does not reveal interoperability, and 9300 is not in hardware list for FreeBSD yet. > are materially faster (but still in "host" mode as opposed to any sort > of "smart", "raid" or "buffered" mode) should be considered. > > The "smarter" the card the dumber the results tend to be when ZFS is in > use, in my experience :) Yes, I'm well aware of it ;) Thanks! -- Sincerely, D.Marck [DM5020, MCK-RIPE, DM3-RIPN] [ FreeBSD committer: marck@FreeBSD.org ] ------------------------------------------------------------------------ *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru *** ------------------------------------------------------------------------