From owner-freebsd-hardware@freebsd.org Thu Sep 13 15:58:48 2018 Return-Path: Delivered-To: freebsd-hardware@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 5F5EE1091BA1 for ; Thu, 13 Sep 2018 15:58:48 +0000 (UTC) (envelope-from leeb@ratnaling.org) Received: from mail-io1-xd31.google.com (mail-io1-xd31.google.com [IPv6:2607:f8b0:4864:20::d31]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 01AD276E43 for ; Thu, 13 Sep 2018 15:58:47 +0000 (UTC) (envelope-from leeb@ratnaling.org) Received: by mail-io1-xd31.google.com with SMTP id y10-v6so3547334ioa.10 for ; Thu, 13 Sep 2018 08:58:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ratnaling-org.20150623.gappssmtp.com; s=20150623; h=mime-version:from:date:message-id:subject:to; bh=quu9ZHoR9x0yYxahKkT3wrEE9U7r9ySlVbCRpmocAEY=; b=HsW0gTNoC5GHqFERVDB9rZ0bkZ9jrd0F0szjKMo2TThWM30ToLLsPZs98u+I5UBYj4 5iCJcXY7NAjb8mstTpMoEFjGAH6bmpGFmV4C9pdc73n2TZ38kqyg0/BZ+lHbPB+hbsC5 Qn9/jyFGaXAzQauHC6/3D4KZ0pkhLxZ9gyh7NbO9iUh9GXB6KtEierP5GR1wUFLI4eNV Qga5StYpUd85XfIZI31JIYKoLfV2KuzS9y8MgMwsiFOuL4IKDBwzKh4HVlzMEmEKY2tG dFdRFni9zO+BLdXW4rWm7mUz+yWTQ5qFuV287CGjZcK8bI9FTY9AQcbqVSzf0i7qWapq yjSA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=quu9ZHoR9x0yYxahKkT3wrEE9U7r9ySlVbCRpmocAEY=; b=oURpezQ3+klehxHjiYH8+KdQPH2skszYGatkBsrBR/TaqvXhbhibAYifZDnB3vyUnN lA/VA43yr4BjkPQWB+e6Pq++ixL2vjuhgcUJNg9cY8wjdm5RD/kbZAFpbRF9EuKFe4ro rrVw9ZQrXPeEdDIODFtiJFWqBhp9XW4m0MMnRAk+n9J0KeZiOzZST10MjHRAvVJcJjKh xBXMxF2P7wWmJZQtJSJLY9WVd+8SvXnU+Safr2L+Nkb5rw504Dt5yN98CIltrSLDewIc 2hTuAvHz+s/KJRwuI1YFJlyEywgJAnzEutg5RRX1j9is1aYfgPgSBO85qrJtT0cPubMX W7UA== X-Gm-Message-State: APzg51BOZvRHixLZfuJafAZStB3GnI7qnQqzIbVZClfKww7H6L1gmfdg eyCeCW71aZvUBc6i43nMCaYxgoLAH1jAPoU0yYVajWDnnMItIw== X-Google-Smtp-Source: ANB0VdYrjR+QQlrhwqK6P6L4iqLKYQ24ubBTqHLp6X5jbWPxB4a1VdHdlxd+Y9E0F16zqLeF+KWkJcHl9NflVKHETyY= X-Received: by 2002:a6b:f609:: with SMTP id n9-v6mr7057389ioh.259.1536854326759; Thu, 13 Sep 2018 08:58:46 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a4f:d104:0:0:0:0:0 with HTTP; Thu, 13 Sep 2018 08:58:46 -0700 (PDT) From: Lee Brown Date: Thu, 13 Sep 2018 08:58:46 -0700 Message-ID: Subject: Dell SAS6IR is it worth the effort to convert to IT To: freebsd-hardware@freebsd.org Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.27 X-BeenThere: freebsd-hardware@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: General discussion of FreeBSD hardware List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 13 Sep 2018 15:58:48 -0000 Hi, I'm in the process of setting up an old PowerEdge R410 which has, I believe, the LSI Logic AS1068, using the mpt driver. I'm not interested in running it as a hardware RAID but rather a geli(authentication only)+gmirror+gjournal. It seems like flashing it requires booting into dos, which frankly I can't be bothered with. mptutil doesn't appear to have that capability. Are there any major downsides to running it in IR mode as two disks? There's no option to turn off the write-cache, but being battery backed the only danger I see with that is if the machine is powered with pending writes on the card and the battery gives out before power is restored. The use case is routing/snort IPS with minimal logging, so disk performance isn't critical. It will be the redundant router so mostly doing nothing except the little work OSPF needs. Thanks in advance for any comments -- lee