From owner-freebsd-fs@freebsd.org Mon Aug 22 19:16:40 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 BCE93BC2570 for ; Mon, 22 Aug 2016 19:16:40 +0000 (UTC) (envelope-from lkateley@kateley.com) Received: from mail-it0-x236.google.com (mail-it0-x236.google.com [IPv6:2607:f8b0:4001:c0b::236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 7F2601847 for ; Mon, 22 Aug 2016 19:16:40 +0000 (UTC) (envelope-from lkateley@kateley.com) Received: by mail-it0-x236.google.com with SMTP id x131so104971349ite.0 for ; Mon, 22 Aug 2016 12:16:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kateley-com.20150623.gappssmtp.com; s=20150623; h=reply-to:subject:references:to:from:organization:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding; bh=94tqfnnRKgDVHihBVevkYeM2t5WWH1t8di66q9RYexQ=; b=fD278Jgg3hiXQDV2GP/Do9goV6O6BbhS83H1uiNuyBhZi2DoKMIVNxdbdCHrLuyluv 0UA0YwrRMIaSXDGc1LlrKQzcLUoPKy4wXd3J2Af2eW+SqpMEQoAjbdlSwWoudc9WfMO/ NhvMkfqj4auABir1ITtgTY+X+W/5LFeqqS8jYEWOWg0J0wYbKqHjdEmhgXJSAwRH9dss wmcUBSDjerp34aVYOTLTrNzci5uqsWW5YeFeIAmgvZnOPuIRiO0BlrspGRjDusc+Dp/m l02XQGEtsPDAYIljmVa5rNziJA6hAng1Bk8yjPCCZBmDfe/gMk2yPEcXoTvMpPZk/8O5 uccw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:reply-to:subject:references:to:from:organization :message-id:date:user-agent:mime-version:in-reply-to :content-transfer-encoding; bh=94tqfnnRKgDVHihBVevkYeM2t5WWH1t8di66q9RYexQ=; b=P3L30QiFDO/fseV20GUSkxCsaueeEw+nQR5XC8jcVNyrgKeNNTqAzb9wBq2CrOZ+mj 7rIGdlApidX8Hx6N1Me6h30JD8nQIBV6yFrCJ+Sk/6IRVh7nh2uVIWb5kilKknNiIfBn gH0o0yIMNvDSD79ly7/iRNMAaLbWt+4vPp8955eaOaezW2JJWDmGhR+hct7sgTZaJtB3 hS6VbkidbS9w1SxzKz3fu84JoJJ+1gOt2UQDrsRJt97+VjHHPqIWhP7VQ9ppk/d/Ee8f tuj+CbXoC2YEa+sVvkFwnVe+7bINn1DVg/acmQfiMHprqRYQri7//uYtxuhuDVn8cVCw Zqpw== X-Gm-Message-State: AEkoous4BiXO2YGR9G0EbCTpRkwti6KcrC0QNWYy1CKYHqeug9BdyoOMmWFrPlPDxTYaZA== X-Received: by 10.107.132.104 with SMTP id g101mr29156015iod.147.1471893399661; Mon, 22 Aug 2016 12:16:39 -0700 (PDT) Received: from Kateleyco-iMac.local (c-50-188-36-30.hsd1.mn.comcast.net. [50.188.36.30]) by smtp.googlemail.com with ESMTPSA id w12sm27699iow.29.2016.08.22.12.16.38 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 22 Aug 2016 12:16:39 -0700 (PDT) Reply-To: linda@kateley.com Subject: Re: Recommended HBA for ZFS, contemporary References: <306ccab3-4c78-751a-2258-54701a64ab4b@internetx.com> <41DE4DAA-B5E1-4BB9-AF54-780236A901EF@gmail.com> To: freebsd-fs@freebsd.org From: Linda Kateley Organization: Kateley Company Message-ID: <6f78c6ba-3118-8390-3956-64f573db4d54@kateley.com> Date: Mon, 22 Aug 2016 14:16:38 -0500 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit 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 19:16:40 -0000 Their cards can be run in 2 different modes. One that does raid on the cards, and the other just passes through the devices. That is IT mode. ZFS does better if you give it control of the device. By default it wants to do things like like send a cache flush request to the disks. If you have a controller card that doesn't understand the request, it can hang. Or you can turn off cache flushing. On 8/22/16 1:34 PM, Mike wrote: > On 8/22/2016 12:18 PM, Ben RUBSON wrote: >>> On 22 Aug 2016, at 18:14, InterNetX - Juergen Gotteswinter wrote: >>> >>> LSI SAS 2008 Based HBA, there are dozens of OEM available for Budget Prices >> With the IT firmware. > > What's the significance of "IT firmware"? > > _______________________________________________ > freebsd-fs@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"