From owner-freebsd-fs@freebsd.org Tue Sep 29 18:04:47 2015 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 0BC8DA0B13A for ; Tue, 29 Sep 2015 18:04:47 +0000 (UTC) (envelope-from michael@fuckner.net) Received: from mo6-p00-ob.smtp.rzone.de (mo6-p00-ob.smtp.rzone.de [IPv6:2a01:238:20a:202:5300::5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.smtp.rzone.de", Issuer "TeleSec ServerPass DE-2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 9C0901D0A for ; Tue, 29 Sep 2015 18:04:46 +0000 (UTC) (envelope-from michael@fuckner.net) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1443549883; l=1042; s=domk; d=fuckner.net; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:MIME-Version: Date:From:References:To:Subject; bh=iVxTs+y/pJnSos97jJ95mjVphaSEv/wumJLvOpXY7b4=; b=PFM1OPGudkhKEJeVonDye996bForIR9KF/5Kxxz4ecJmUYpT3NfPTKVJweVbbkDXrso eui7XJ4W8j3VEad0ly52BsRcs1/KrA4LUL+ci1XCO+d4Xj/Bz32OrL+X68ifgAJ3yP7RA okIe6lGhU1psNHUNtFqQMIkJ6wfWYkb1Xp4= X-RZG-AUTH: :IWUHfUGtd9+6EujMWHx57N4dWae4bmTL/JIGbzkGUoozgknstV9BEzWRmW1VTdMloDLywfq0FgrD3IBhKcc7x4l//jtG+1R3pQ== X-RZG-CLASS-ID: mo00 Received: from [IPv6:2a02:2028:62e:a301:1d35:5a28:edf0:3b7a] (some-ipv6-address.wtnet.de [IPv6:2a02:2028:62e:a301:1d35:5a28:edf0:3b7a]) by smtp.strato.de (RZmta 37.12 AUTH) with ESMTPSA id Y01bacr8TI4c9pr (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA (curve secp521r1 with 521 ECDH bits, eq. 15360 bits RSA)) (Client did not present a certificate); Tue, 29 Sep 2015 20:04:38 +0200 (CEST) Subject: Re: Cannot replace broken hard drive with LSI HBA To: jg@internetx.com, Graham Allan , =?UTF-8?Q?Karli_Sj=c3=b6berg?= , "freebsd-fs@freebsd.org" References: <1443447383.5271.66.camel@data-b104.adm.slu.se> <5609578E.1050606@physics.umn.edu> <560A4640.3030200@internetx.com> <560A9461.8090300@physics.umn.edu> <560A977C.1070102@internetx.com> From: Michael Fuckner Message-ID: <560AD2B9.5040706@fuckner.net> Date: Tue, 29 Sep 2015 20:04:41 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: <560A977C.1070102@internetx.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 29 Sep 2015 18:04:47 -0000 On 9/29/2015 3:51 PM, InterNetX - Juergen Gotteswinter wrote: > From my Experience using SATA Disks on SAS Controllers, no matter if > theres an Expander between or not or mixed, those Setups keep on beeing > flakey / unreliable. I might work under certain conditions, but its > nothing you can bet on. > > Garret Damore (Illumos Project) describes the problem more detailed here > > http://garrett.damore.org/2010/08/why-sas-sata-is-not-such-great-idea.html > come on, the article is 5 years old, some things changed since then! - MUX Boards are unreliable and expensive- long time since I last saw those boards - SAS Disks are not just 10/15k high performance Disks anymore, most Nearline Disks are available with native SAS interface as well - if you pick the right disk there is no trouble using SATA Disks on SAS Expanders or SAS Controllers (they should have R/V sensors, optimized FW...). - if you use desktop drives in a shelf with lets say 24 slots you should not expect it to work ;-) Regards, Michael!