From owner-freebsd-fs@FreeBSD.ORG Wed May 25 22:10:45 2011 Return-Path: Delivered-To: fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 9A0D9106564A for ; Wed, 25 May 2011 22:10:45 +0000 (UTC) (envelope-from universite@ukr.net) Received: from otrada.od.ua (universite-1-pt.tunnel.tserv24.sto1.ipv6.he.net [IPv6:2001:470:27:140::2]) by mx1.freebsd.org (Postfix) with ESMTP id 242818FC14 for ; Wed, 25 May 2011 22:10:44 +0000 (UTC) Received: from [IPv6:2001:470:28:140:25bb:2c3d:a167:a9ef] ([IPv6:2001:470:28:140:25bb:2c3d:a167:a9ef]) (authenticated bits=0) by otrada.od.ua (8.14.4/8.14.4) with ESMTP id p4PMAeem020467 for ; Thu, 26 May 2011 01:10:41 +0300 (EEST) (envelope-from universite@ukr.net) Message-ID: <4DDD7E45.8020008@ukr.net> Date: Thu, 26 May 2011 01:10:13 +0300 From: "Vladislav V. Prodan" User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; ru; rv:1.9.2.17) Gecko/20110414 Thunderbird/3.1.10 MIME-Version: 1.0 References: <4DDC0D13.3030401@ukr.net> <20110524201118.GF2415@garage.freebsd.pl> <4DDC128F.80203@ukr.net> <20110525025831.GA2363@DataIX.net> <4DDD0516.4060000@ukr.net> <20110525175526.GA45398@icarus.home.lan> In-Reply-To: <20110525175526.GA45398@icarus.home.lan> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-94.3 required=5.0 tests=FREEMAIL_FROM,FSL_RU_URL, MISSING_HEADERS,RDNS_NONE,SPF_SOFTFAIL,T_TO_NO_BRKTS_FREEMAIL, USER_IN_WHITELIST autolearn=no version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mary-teresa.otrada.od.ua X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.7 (otrada.od.ua [IPv6:2001:470:28:140::5]); Thu, 26 May 2011 01:10:43 +0300 (EEST) Cc: fs@freebsd.org Subject: Re: how to import raidz2, if only one disk is missing? X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 May 2011 22:10:45 -0000 25.05.2011 20:55, Jeremy Chadwick wrote: > Without knowing the exact device model of disk ("Device Model:"), and > whether or not the disk is within smartmontools' internal drive database > ("Device is:"), this attribute may or may not actually be > End-to-End_Error. It would be helpful if you could provide that. Are > these HP drives, per chance? > > Assuming these are HP drives: end-to-end error indicates, more or less, > bad cache on the drive itself. HP implemented a parity check on every > 512 bytes read/written from/to the drive's cache. There's no error > correction used (to my knowledge), and failures are reported back to the > (host) controller in some manner. HP does document that "in some > situations" (reads) the drive can attempt re-reads and re-write that > block of data in the cache, in hopes that a subsequent read will work. > In that situation I imagine the attribute would be incremented but a > hard failure (ATA error, etc.) not shown. > > Are you absolutely certain you haven't seen a single error on your > FreeBSD console (or in /var/log/messages, etc.) since these drives were > put into use? Were these brand new drives or previously used? > > (Footnote for readers: this SMART attribute shouldn't be confused with > attribute 199 (CRC errors), which indicates communication failures > between both controllers (the controller in the host, and the controller > on the drive PCB) and is often an indicator of bad cabling, a bad > hot-swap backplane, a dusty/dirty SATA port, etc...) > Thanks so much for so many messages. I wanted to spread the software issue from hardware, but probably will have to tell:) I mean: Motherboard BIOSTAR TA780G M2 + HP - 1 pc CPU AMD Athlon (tm) 64 X2 Dual Core Processor 4200+ - 1 pc. PCI Express (1x) Controller for 2 SATA ports, chipset Silicon Image Inc SiI 3132 - 1 pc. HDD SAMSUNG HD753LJ - 6 pcs. HDD WDC WD5000AAKS-00TMA0 - 1 pc. Power Supply Chieftec 550 - 1 pc. On WD drives installed FreeBSD and plugged into the port Pci-e controller. All HDD Samsung plugged in the 6 slots on the motherboard. And an array of them gathered raidz2 on ZFS. All of this is gathered in a large body of Chieftec three years ago Periodically, about once every six months, 1-2 hard drive fall off from the system Helped or unplugged sata-data cable, and again plugged into the socket. A couple of times I changed them all sata-data cables with new ones. Recently, I set up to monitor smartd, to be aware of life hdd. He immediately found problems at three hdd. A couple of problematic hdd were tested mhdd, but problems with the bad-blocks not found. One of these problematic hdd I passed a local service center Samsung promised to return in 10-14 days. Now plan to borrow hdd 750GB and above to rebuild pool to working state, partly to make backuping data to another hdd. P.S. Thank you translate.google.com for translation :) -- Vladislav V. Prodan VVP24-UANIC +380[67]4584408 +380[99]4060508 vlad11@jabber.ru