From owner-freebsd-stable@freebsd.org Sun Oct 16 16:56:16 2016 Return-Path: Delivered-To: freebsd-stable@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 30159C14185 for ; Sun, 16 Oct 2016 16:56:16 +0000 (UTC) (envelope-from emz@norma.perm.ru) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 1A1481281 for ; Sun, 16 Oct 2016 16:56:16 +0000 (UTC) (envelope-from emz@norma.perm.ru) Received: by mailman.ysv.freebsd.org (Postfix) id 168F4C14184; Sun, 16 Oct 2016 16:56:16 +0000 (UTC) Delivered-To: stable@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 1643EC14183 for ; Sun, 16 Oct 2016 16:56:16 +0000 (UTC) (envelope-from emz@norma.perm.ru) Received: from elf.hq.norma.perm.ru (mail.norma.perm.ru [IPv6:2a00:7540:1::5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail.norma.perm.ru", Issuer "Vivat-Trade UNIX Root CA" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 87B80127A for ; Sun, 16 Oct 2016 16:56:15 +0000 (UTC) (envelope-from emz@norma.perm.ru) Received: from [IPv6:2a02:2698:27:b4d9:c47f:381:9c23:2301] ([IPv6:2a02:2698:27:b4d9:c47f:381:9c23:2301]) (authenticated bits=0) by elf.hq.norma.perm.ru (8.15.2/8.15.2) with ESMTPSA id u9GGu9mI037484 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO) for ; Sun, 16 Oct 2016 21:56:10 +0500 (YEKT) (envelope-from emz@norma.perm.ru) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=norma.perm.ru; s=key; t=1476636970; bh=Pz3vlT8LimicJwbDoXfwOLVAQSFRneTm3aCB7QHRVbA=; h=To:From:Subject:Date; b=HR2UtbwqEyJ3VEI8vQlaPdhDCyiHcrk2/JD3kLesxdzPmxdESMAVAYQiHgZTDsmvE 7HRqlVTPGDEzGESwHZwXUcU/sl0K0PgvfOWVk+g9JB34y+iIu3hkNkROvTv78OwQ/x vqf9O7XxOoLlqtv++OJ3zls7bSKoMvv3piw5RbnI= To: "stable@freebsd.org" From: "Eugene M. Zheganin" Subject: zfs/raidz: seems like I'm failing with math Message-ID: Date: Sun, 16 Oct 2016 21:56:10 +0500 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 16 Oct 2016 16:56:16 -0000 Hi. FreeBSD 11.0-RC1 r303979, zfs raidz1: ===Cut=== # zpool status gamestop pool: gamestop state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM gamestop ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 da0 ONLINE 0 0 0 da1 ONLINE 0 0 0 da2 ONLINE 0 0 0 da3 ONLINE 0 0 0 da4 ONLINE 0 0 0 da5 ONLINE 0 0 0 ===Cut=== 6 disks 960 Gbs each: ===Cut=== # smartctl -a /dev/da0 smartctl 6.5 2016-05-07 r4318 [FreeBSD 11.0-RC1 amd64] (local build) Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Model Family: Samsung based SSDs Device Model: SAMSUNG MZ7KM960HAHP-00005 Serial Number: S2HTNX0H507466 LU WWN Device Id: 5 002538 c402bdac1 Firmware Version: GXM1003Q User Capacity: 960 197 124 096 bytes [960 GB] Sector Size: 512 bytes logical/physical [...] ===Cut=== But: ===Cut=== # zpool list gamestop NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT gamestop 5,22T 4,38T 861G - 24% 83% 1.00x ONLINE - ===Cut=== Why 5.22T ? If zpool is displaying raw size, it should be 960 x 6 = 5760 Gb = 5.65 T. If it's displaying the actual data, then it should be 960 x 5 = 4800 Gb = 4.68 T. 5.22 T is neither of these. I'm stuck, please explain. :) Thanks. Eugene.