From owner-freebsd-fs@freebsd.org Wed Feb 22 20:36:20 2017 Return-Path: Delivered-To: freebsd-fs@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 AF104CE95C0 for ; Wed, 22 Feb 2017 20:36:20 +0000 (UTC) (envelope-from killing@multiplay.co.uk) Received: from mail-wm0-x229.google.com (mail-wm0-x229.google.com [IPv6:2a00:1450:400c:c09::229]) (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 67ADF169C for ; Wed, 22 Feb 2017 20:36:20 +0000 (UTC) (envelope-from killing@multiplay.co.uk) Received: by mail-wm0-x229.google.com with SMTP id v186so151775383wmd.0 for ; Wed, 22 Feb 2017 12:36:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=multiplay-co-uk.20150623.gappssmtp.com; s=20150623; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to; bh=+HtC8kbEqCoPYI/UYwsbTL7O9JPpuhWex+jospeWPMQ=; b=Hv2bTR5RUVdSzataz/Rfs6sARuU0v+XbRTIalFjYPzbrH0Zs0D5i6MHAuQ7b1l/mAS ZXVZlLxoq3JmCXo9VHpV9OkJ+/JFlOg8yJo390eVFGpi7p/AHK70WTPcrz/Y0xjzNhvM 8IAhNp70aZ/Jx06x+vuyslvPb4W9UA9cVNdu12rPwZDq07gZUQ01KxXXO1sUJgi0ns+W 6M8k1AjFsD+LherNxuvI2CCUjK6CVIknEkYuETRBJS2GHUN4zJ1rEmbb20F5+7Pd2RYn /Ukp67gLkNc2lvnXqmIdqCq0Ag3YykBlyUqzgrX+f84YCRa3YDyX6hXB58dttDjz4JXQ c0qQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to; bh=+HtC8kbEqCoPYI/UYwsbTL7O9JPpuhWex+jospeWPMQ=; b=tBEs1pvGQH5NOmBofAzYMwRL8KHSos1AfvHtpq+wZi1cdu73q4fKg6woYL8PoZSQEs x6GoM78xYtst/T7hnwWkJ7jdfC5rKHmAB/lNrVSZv1dg4wsjtbgiOd3tqqLxLlpUw34h wlldoPHSkbJaSVcJdiNKLgKn1V0f/otHCIj/BZ2hAnjSKt0Gqog7lZBsUm85hl96elqT B2D5M2mf6+/zmbW+R7jY2s25Vi4I9Mrh7eS2IttLc/IVtb/28nsXbM9l79oyCGIygx/q qI38Sg156WbsM23APvx3xd2i5Ydz6F3yju0pAEV1+nvb2IJakS8KVBJm7wLQpsWTUna0 Hfow== X-Gm-Message-State: AMke39mZCJoWuv0f9qOJ9xR9/gmXoeqUNx9UeXVi7OSL9bUOGeGcVvMuUtDXBafxMb1+4NjV X-Received: by 10.28.62.144 with SMTP id l138mr131466wma.50.1487795778343; Wed, 22 Feb 2017 12:36:18 -0800 (PST) Received: from [10.10.1.58] ([185.97.61.4]) by smtp.gmail.com with ESMTPSA id 202sm3426075wmp.20.2017.02.22.12.36.17 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 22 Feb 2017 12:36:17 -0800 (PST) Subject: Re: 10.2 zfs-on-root will not boot after an unclean reboot To: freebsd-fs@freebsd.org References: From: Steven Hartland Message-ID: Date: Wed, 22 Feb 2017 20:36:17 +0000 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.7.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 22 Feb 2017 20:36:20 -0000 On 22/02/2017 18:53, Ricky Huang wrote: > Hello all, > > Server got power-cycled by the datacenter (accident) and now it won't boot. Previous “clear" reboots have always been fine. > > It's a ZFS-on-root setup installed via FreeBSD installer and it's now displaying: > >> FreeBSD/x86 boot >> ZFS: I/O error - blocks larger than 128K are not supported >> ZFS: can't find dataset u >> > Any suggestions on where I can begin to diagnose this issue? > > Note: I have infrequent access to the server, so please "batch" the suggestions so I can try them when I make my way into the d.c. > > Given the "blocks larger than 128k are not supported" message it sounds like you enabled large block support on your root pool, which is not supported. If this is the case then your only option is to boot from a rescue disk and transfer the data off. Note if this the case, its not the unclean reboot that caused the issue its the large block size, which would have happened even with a clean reboot. Regards Steve