From owner-freebsd-questions@FreeBSD.ORG Fri Jun 15 21:02:41 2012 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 01B6A106566C for ; Fri, 15 Jun 2012 21:02:41 +0000 (UTC) (envelope-from johnl@iecc.com) Received: from leila.iecc.com (leila6.iecc.com [IPv6:2001:470:1f07:1126:0:4c:6569:6c61]) by mx1.freebsd.org (Postfix) with ESMTP id 6F2B28FC14 for ; Fri, 15 Jun 2012 21:02:40 +0000 (UTC) Received: (qmail 4430 invoked from network); 15 Jun 2012 21:02:39 -0000 Received: from leila.iecc.com (64.57.183.34) by mail1.iecc.com with QMQP; 15 Jun 2012 21:02:39 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=iecc.com; h=date:message-id:from:to:subject:mime-version:content-type:content-transfer-encoding:vbr-info; s=4fdba2ef.xn--30v786c.k1206; i=johnl@user.iecc.com; bh=IRtYdiUag/XVuGWaC3Pul08UDi6Ov3VZtHsP786gmAc=; b=RkFATaOI64t9DZ8xlHigNERgD38+PHcCrCZEsCt51C7aCvk//C9o8qzt7Ya03VMPppj35kLx/aq2X5G/kLJXrHYi2KxqStEcnzKI6I4qaMIZu37GdrfIHurSgQcEQgZdcfoiFBr5U6yQAXGlsBvW7IEcsMN/FjNnEGbz9Y8g8cw= VBR-Info: md=iecc.com; mc=all; mv=dwl.spamhaus.org Date: 15 Jun 2012 21:02:17 -0000 Message-ID: <20120615210217.87837.qmail@joyce.lan> From: "John Levine" To: freebsd-questions@freebsd.org Organization: X-Headerized: yes Mime-Version: 1.0 Content-type: text/plain; charset=utf-8 Content-transfer-encoding: 7bit Subject: Free space in ZFS X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 15 Jun 2012 21:02:41 -0000 I made a three disk zraid ZFS pool yesterday from three new 1 TB disks, which I'm using for backup. Then I did a backup and made a zfs volume. The free space numbers don't make sense. This is on 8.3, ZFS version 15. # zpool list NAME SIZE USED AVAIL CAP HEALTH ALTROOT backup2 2.72T 310G 2.42T 11% ONLINE - Given that it's zraid, the total available space should be a little under 2TB since the third disk is for parity. But zpool gives me a total of 2.72T, as though the third disk was for data. # zfs list NAME USED AVAIL REFER MOUNTPOINT backup2 206G 1.58T 31.3K /backup2 backup2/20120615 206G 1.58T 206G /backup2/20120615 Well, that makes more sense, total is 1.78Tb. # df -g Filesystem 1G-blocks Used Avail Capacity Mounted on backup2 1618 0 1618 0% /backup2 backup2/20120615 1825 206 1618 11% /backup2/20120615 Now the total is 1.82Tb. Huh? The backup filesystems are compressed, but surely they're showing me the actual size, not the uncompressed size. Or are they? R's, John