From owner-freebsd-questions@FreeBSD.ORG Mon Aug 31 18:22:27 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 65571106566C for ; Mon, 31 Aug 2009 18:22:27 +0000 (UTC) (envelope-from tajudd@gmail.com) Received: from mail-yx0-f195.google.com (mail-yx0-f195.google.com [209.85.210.195]) by mx1.freebsd.org (Postfix) with ESMTP id 21A9F8FC13 for ; Mon, 31 Aug 2009 18:22:26 +0000 (UTC) Received: by yxe33 with SMTP id 33so1921495yxe.7 for ; Mon, 31 Aug 2009 11:22:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=KoxoK0q6NUdFxmjhIWsgfgEmPN4LIqPlB/g7724gQiY=; b=tc03VEWnU2QuZ42JjiOd8PzV7uGW4033JRD2mpGSYYehMB5hc09fZchjQs3WHT8kXe aIi6JQCXRJwddROSZC6hzsNmTZG2MCNwlQXS8d8d9tPLGyU0uk2uuZMgBxoto8eQEEQ/ fCvEhRxcFkaq/bAPqLQ61Wf6Fi7N1Qtks4LH4= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=nKbYZvB7CKBZU6UCWKmSv6GDSk34MnYacWQKiY8q1E1zoEES1ZKYcQw/tNP8gbXFbu dQDL61YTGm3qPQ3qkCQYrEdHAHMI3Jvxz8b+37txAy9PnEhMNaoAMD6P9U2vdqJMXioD Oj/O57HMKY+7DJfNqvl+3lWWowjaY5wNTDWwk= MIME-Version: 1.0 Received: by 10.101.85.10 with SMTP id n10mr6009323anl.156.1251742945974; Mon, 31 Aug 2009 11:22:25 -0700 (PDT) In-Reply-To: <4A9B731E.9050400@mapper.nl> References: <4A9B731E.9050400@mapper.nl> Date: Mon, 31 Aug 2009 12:22:25 -0600 Message-ID: From: Tim Judd To: Mark Stapper Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd-questions@freebsd.org Subject: Re: ZFS and DMA read error 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: Mon, 31 Aug 2009 18:22:27 -0000 On 8/31/09, Mark Stapper wrote: > Good day to you, > > I'm having a bit of trouble with one of the disks in my zfs raidz1 pool. > It's giving me dma read error, and zpool is reporting READ failures. > However, data integrity is OK :-) > Unfortunately I was in the middle of rearranging my backup media, so I'm > backup up everything as we speak. > I will be testing the failing drive in another computer soon, however > before I return it i'd like to know if this could be caused my something > other than hardware failing. > Below the output of "zpool status" and a snippet of /var/log/messages > showing the DMA errors. > Thanks for the input. > Greetz, > Mark > > > pool: data > state: ONLINE > status: One or more devices has experienced an unrecoverable error. An > attempt was made to correct the error. Applications are unaffected. > action: Determine if the device needs to be replaced, and clear the errors > using 'zpool clear' or replace the device with 'zpool replace'. > see: http://www.sun.com/msg/ZFS-8000-9P > scrub: none requested > config: > > NAME STATE READ WRITE CKSUM > data ONLINE 0 0 0 > raidz1 ONLINE 0 0 0 > ad4 ONLINE 0 0 0 > ad6 ONLINE 21 0 0 > ad8 ONLINE 0 0 0 > ad10 ONLINE 0 0 0 > > errors: No known data errors > > Aug 31 03:04:35 yoshi kernel: ad6: FAILURE - READ_DMA48 > status=51 error=40 LBA=932040832 > Aug 31 03:04:35 yoshi root: ZFS: vdev I/O failure, zpool=data > path=/dev/ad6 offset=477204905984 size=65536 error=5 > Aug 31 03:04:35 yoshi root: ZFS: vdev I/O failure, zpool=data > path=/dev/ad6 offset=477204925440 size=2560 error=5 Since it's all throwing errors at the same LBA, I'd run a SMART diagnostics on the drive (i think it's port sysutils/smartmontools) and see if it's showing errors too. Looks like a failing/failed drive and I would recommend replacing it. I doubt (but you can try) spinrite will help you when you get to this point. spinrite's website is at grc.com Hope you have backups or redundancy. No fun replacing data. --TJ