From owner-freebsd-questions@freebsd.org Tue May 16 21:04:48 2017 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 59C95D70924 for ; Tue, 16 May 2017 21:04:48 +0000 (UTC) (envelope-from drizzt321@gmail.com) Received: from mail-ua0-x230.google.com (mail-ua0-x230.google.com [IPv6:2607:f8b0:400c:c08::230]) (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 07E23983 for ; Tue, 16 May 2017 21:04:48 +0000 (UTC) (envelope-from drizzt321@gmail.com) Received: by mail-ua0-x230.google.com with SMTP id j17so107732061uag.3 for ; Tue, 16 May 2017 14:04:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=33wGIsSwjVPO7X6aa03n4M1mPcigFq8y64aAocYWn9o=; b=pXdfUuvVpWcxiPat513OwPLUftzmIj/1VXjFsgA7SxxWJMxBSezjAH8LU8lVLxuf6V S8ipkwSYdR0S6k/jbU8IGUTELArce8B1xu2FhQRUkTi16cOxufR+xlbJJR7aeS7U5jVX aExrXKn6FNlrHGfSkX5Ah1XH1Y64bdHOcaZ509qvpdzGcMwsm5pRSoT1BxzInyJpmTZV eIMX/hXOk4lSCiQ8tPFWAeBLKvZ15CVVF88GYSPb6m2DcxyLmpd+f6MLXvf2HJhw+Awb aOtaUPfrORO/3l1lEsQbb/lxhsuLHerZoG6rxINGUX2RnUlxen0P2zZNfzOlKgB3dRpc TZSg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=33wGIsSwjVPO7X6aa03n4M1mPcigFq8y64aAocYWn9o=; b=kgzC8PRsCYWwtbp1s2VzK6SXm8xcTEFyeyKywK9eSGudFMSs9xYi48UiL0QmhnciqU vaVS5CtfTmcmKFL8uQFLMbQ5RkouoUej4G/ZpcKpqXZl3k4aKsLR1cTKx4XW10lRzqat iaJ+guWjG5/8+23pJ48mPjsYm9zK1Ohv1j1S6hVugOOFPlySQc77wbUtvR1JUwJNxYZM uAR10ppo4cJwwhdasbvWsAgKkuivzVhfWWxvqs4WcvzcbnN1Czh8vO5D6lbnOezAlP4O fNpiV+OWFB6QNDwiqU4KMHZqcrOB6n6z6A0zqRO1/RIeS5mbzOZXr0vFqdxHjPb+a/Iq qJvw== X-Gm-Message-State: AODbwcA/tYXNLMQGHeRU5w5vVA2nb/yOCXuW9P1Gc4eFgSAMDcs0IVdH x5E3xHbVJzvIjQlidpGrYUlRNz90eFX4 X-Received: by 10.176.80.162 with SMTP id c31mr5762982uaa.25.1494968686540; Tue, 16 May 2017 14:04:46 -0700 (PDT) MIME-Version: 1.0 Received: by 10.103.148.75 with HTTP; Tue, 16 May 2017 14:04:16 -0700 (PDT) In-Reply-To: <20170516132355.e7346f50.freebsd@edvax.de> References: <99fa2537-9fb1-0ccf-d906-39db1c2e2685@FreeBSD.org> <9997fd01-273c-b176-b9ed-e33e9e2d1b2f@ohlste.in> <20170516132355.e7346f50.freebsd@edvax.de> From: Aaron Date: Tue, 16 May 2017 14:04:16 -0700 Message-ID: Subject: Re: ZFS root on single SSD? To: freebsd-questions@freebsd.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 May 2017 21:04:48 -0000 LOL, well, this is my home system, and but I do recognize that RAID !=3D backup (have CrashPlan for that), and even mirror can fail on a rebuild. I was just trying to gauge if it was an actual bad idea, or just a "meh, whatever dude, probably won't hurt". @Matt Usage pattern will be basically general system processes, and quite possibly several bhyve VMs, things like CrashPlan (stupid lack of FreeBSD support) and a few game server VMs, although for the games I'll almost certainly have the data hosted via shares onto my ZFS array which is my primary data storage. System resources...I've got 12C/24T, 72GB RDIMM memory. It'll be fine. I've actually been running zroot mirror & raidz array with 12GB memory and an old Athlon II dual core. So should be fine. I can swap out some 4GB dimms for 8GB dimms if I need more memory. Data security, that's where I'd like ZFS for, for the checksumming & such, even though I won't get drive failure protection. Still, I've had the SSD running and in use on a different machine for a while, so if it was going to just have a controller failure or something it would have had it by now, so should be fine. And I'll backup configs & such just in case anyway. --Aaron On Tue, May 16, 2017 at 4:23 AM, Polytropon wrote: > On Tue, 16 May 2017 06:34:38 -0400, jim@ohlste.in wrote: > > I'd add only that while a mirrored zpool offers some data protection, i= t > > is *not* an effective "backup" solution for important data. Drive > > failure during resilver after a drive replacement does occur. If there'= s > > important data on the drive, backing it up to a different medium is > > still essential, whether it's a mirrored pool or a single drive pool. > > [Leaned once the hard way]=E2=84=A2 > > Relatesd typical CTO or IT superior management or executive > statement: "We don't need backup, we have RAID!" ;-) > > > -- > Polytropon > Magdeburg, Germany > Happy FreeBSD user since 4.0 > Andra moi ennepe, Mousa, ... > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions- > unsubscribe@freebsd.org"