From owner-freebsd-questions@freebsd.org Tue Aug 29 20:12:14 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 AED58DE4909 for ; Tue, 29 Aug 2017 20:12:14 +0000 (UTC) (envelope-from wfdudley@gmail.com) Received: from mail-yw0-x231.google.com (mail-yw0-x231.google.com [IPv6:2607:f8b0:4002:c05::231]) (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 6741D6F8A7 for ; Tue, 29 Aug 2017 20:12:14 +0000 (UTC) (envelope-from wfdudley@gmail.com) Received: by mail-yw0-x231.google.com with SMTP id s143so22300369ywg.0 for ; Tue, 29 Aug 2017 13:12:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=wsi8g90qaMhEBMcdaBjW1th9jbf8O7dEj2ttIlSJXGU=; b=d5cpX2RDWCTX23xG7QZWEACV8dl23Fb7bcAxhCnNvzo9li6tKzrt8aBl2YG+T8ZjQp ZtF0KVTMn5U0f5wJVTrzioTxEpVhHtiiDsIalQebEttjZiCfsQh/PcQemc+7v8+GTg3l 3Bt9y/jqDSnYVvax2O5gyuJ6ENt1IWmyrOUd6JDPVEoD8PLyYXBzhiTm8TEQnmoN3VYO Dvr49VokXnXjmIcI9wFYyWRZmQvc2E5T5oFDY/Ux1NsyN21QwrjFr1WxLtW9FOWteD/Q FSwNI8pck0T8fws6zmx1NoM7SUsD58UFBNKIv2bwhW9naMKU6rlhku7fRoRsz726knk5 mk2A== 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=wsi8g90qaMhEBMcdaBjW1th9jbf8O7dEj2ttIlSJXGU=; b=YpGLZs/MoH6EubIpHYGDfPrEHI2Jli+3UMSUjyC4D4Gbh0wIm8EXcIJdIPXgVxNMGX hERjgxPPiZxHr0EcZ7KliCRYsT09UBTAWaimyg/WvKiy8n1MTJBKmV6d6lq9V5YMoU6P nQiPrnKMNIt+ZKF2A6aqVQaHwLQCFwg76jd/v2xngXL7zEdBFWlBfJZn31KD040OnR0E JgsHOyMC0fw8z3Gk4T4HOqfMPcISsHSHqhwTYqVzDQ8fE1c63G1GuYDy0JjXLdviuxKc I8a6+gfyCBWlsgAb8MVI8P8vIfYxYrgmAgrCd0xCdK5XfNONdNwC8zDP/cvcE459iazC M78g== X-Gm-Message-State: AHYfb5jSE+bwfG6JP03LdutSacNawyA5vvyAirAkswEDHpfqzYBx09kX rN4szU9EBfKF31nIAGXKGzW+S90/sA== X-Received: by 10.13.230.143 with SMTP id p137mr1415296ywe.420.1504037533394; Tue, 29 Aug 2017 13:12:13 -0700 (PDT) MIME-Version: 1.0 Received: by 10.37.178.15 with HTTP; Tue, 29 Aug 2017 13:12:12 -0700 (PDT) From: William Dudley Date: Tue, 29 Aug 2017 16:12:12 -0400 Message-ID: Subject: help creating new gmirror > 2TB To: freebsd-questions Content-Type: text/plain; charset="UTF-8" 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, 29 Aug 2017 20:12:14 -0000 Hi, I want to create a simple mirror > 2TB on a FreeBSD 10.3 system. I have 2 identical 4TB disks. The examples in freebsd handbook "geom-mirror" pages show creation of a 2TB mirror using MBR partitioning, and that has an upper limit of 2TB. Some documentation says not to use GPT partitioning with gmirror because both store their information in the last sector on the disk. I'm not expert enough to be able to solve this myself. How do I create a gmirror of 4TB size? I want to partition it into 4 slices after I create it, but think I can use gpart to do that. Note: I'm not interested in using zfs unless there's no way to do this with gmirror. I read too many zfs failure stories on this mailing list to be comfortable with zfs. Thanks in advance, Bill Dudley