From owner-freebsd-questions@freebsd.org Thu Oct 15 13:34:11 2015 Return-Path: Delivered-To: freebsd-questions@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 F0E61A1573B for ; Thu, 15 Oct 2015 13:34:11 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: from mail-wi0-x22e.google.com (mail-wi0-x22e.google.com [IPv6:2a00:1450:400c:c05::22e]) (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 8BC3DDAD for ; Thu, 15 Oct 2015 13:34:11 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: by wijq8 with SMTP id q8so130162532wij.0 for ; Thu, 15 Oct 2015 06:34:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=N78Nu0HEceh43q3xbM344Pf7bSkAb3MmZeCnMQatC04=; b=xqMogfFBER+thlEdfyxs5Fl2LeMoVj3j1F4GwzaaclLw2TKilspsS2mVsfWj/sibpW BXT88oiWNcA6wOh/2lPmvubStw1ozXg8F0TyCr9wY4iUtw7pySayQjbiOuFdFZLUB+lG AEFjHdoTnVN5HqIuY4mUpm3JWjVzhKRCAUJ8gCtu+KPVcE7k2OM167am+GIptMaj7p6G jD6qCyakTtp7O+U4htZqLDdm77sE4WwyGQfjlq1n3bSSq9PQJ5VIi9kQ8LJ7PolR/Ok1 eRVBmnf7MSQ9BCuOyIUuENIYMxCq6+VGW1Aabkjtke0gI6t8wj+QOxPsPVlND/HPLegN Ij5Q== MIME-Version: 1.0 X-Received: by 10.194.143.43 with SMTP id sb11mr11958078wjb.120.1444916050067; Thu, 15 Oct 2015 06:34:10 -0700 (PDT) Received: by 10.194.16.231 with HTTP; Thu, 15 Oct 2015 06:34:09 -0700 (PDT) In-Reply-To: <561F9FAC.9080308@hiwaay.net> References: <561F9FAC.9080308@hiwaay.net> Date: Thu, 15 Oct 2015 08:34:09 -0500 Message-ID: Subject: Re: Follow-up install questions From: Adam Vande More To: "William A. Mahaffey III" Cc: "FreeBSD Questions !!!!" Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Oct 2015 13:34:12 -0000 On Thu, Oct 15, 2015 at 7:42 AM, William A. Mahaffey III wrote: > Pursuant to ongoing issues trying to install FreeBSD 9.3R on my Myth-TV > box, I have some questions about provisioning another box, also w/ 9.3R. > That box is AMD A-10 APU based, w/ 8X 1 TB 2.5" HDD's. Given the problems I > am having getting the (smaller, simpler box) going. I am pondering using > ZFS on the larger box. To that end, I have a couple of questions. ZFS > supports (man page) 'unmirrored pools'. Is that tantamount to striped RAID > ? If so, what sort of I/O performance can I look for there ? There was a > lengthy thread a few weeks ago on ZFS & performance. I (think I) recall > someone saying they used a bunch of 1-HDD vdevs to get some semblance of > good I/O performance w/ a RAIDZn configuration, is that (additional layer > of config) actually required ? My man page says vdev's can be single > devices or 'a collection of devices', with devices being disks (individual > HDD's ?), files, mirrors, or raidz's. Are those mirrors necessarily ZFS > mirrors, or can they be gmirrors ? I am interested in maximizing the size > of the storage pool available, & the best I/O performance I can get. This > box will be backed up across the LAN onto other boxen, so I am worrying > less about HDD reliability & more about performance & max available > GiB's/TiB's. TIA & have a good one. > Why is speed such a concern for you? A single SATA is easily enough to read and write multiple 1080p streams concurrently. What do you have against white space? It's too painful to read further. -- Adam