From owner-freebsd-fs@FreeBSD.ORG Thu Jun 21 22:04:06 2012 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 6ABC11065670 for ; Thu, 21 Jun 2012 22:04:06 +0000 (UTC) (envelope-from prvs=15195631bd=killing@multiplay.co.uk) Received: from mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) by mx1.freebsd.org (Postfix) with ESMTP id EC4F98FC0C for ; Thu, 21 Jun 2012 22:04:05 +0000 (UTC) X-Spam-Processed: mail1.multiplay.co.uk, Thu, 21 Jun 2012 23:03:54 +0100 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on mail1.multiplay.co.uk X-Spam-Level: X-Spam-Status: No, score=-5.0 required=6.0 tests=USER_IN_WHITELIST shortcircuit=ham autolearn=disabled version=3.2.5 Received: from r2d2 ([188.220.16.49]) by mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) (MDaemon PRO v10.0.4) with ESMTP id md50020412655.msg for ; Thu, 21 Jun 2012 23:03:53 +0100 X-MDRemoteIP: 188.220.16.49 X-Return-Path: prvs=15195631bd=killing@multiplay.co.uk X-Envelope-From: killing@multiplay.co.uk X-MDaemon-Deliver-To: freebsd-fs@freebsd.org Message-ID: <7CD42032309D4072A0EC3B0187378658@multiplay.co.uk> From: "Steven Hartland" To: "Rich" , References: <1953965235.30115.1340315339964.JavaMail.root@sz0192a.westchester.pa.mail.comcast.net> Date: Thu, 21 Jun 2012 23:04:38 +0100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="utf-8"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 Cc: freebsd-fs@freebsd.org Subject: Re: ZFS Checksum errors 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: Thu, 21 Jun 2012 22:04:06 -0000 It could also be issues with the hardware above the raid controller, e.g. main memory. Hardware raid check doesn't really tell you too much where as zfs checks are end to end so will detect intermediate issues like memory or cpu problems. We've even had a few issues in the past where the raid controller thought everything was fine but zfs was complaining and it did turn out to be disks on the way out. So at this point I wouldn't rule out anything. Regards Steve ----- Original Message ----- From: "Rich" To: Cc: Sent: Thursday, June 21, 2012 10:51 PM Subject: Re: ZFS Checksum errors To be honest, if ZFS says you've got a ton of checksum errors, I would strongly bet in favor of your data being damaged over a bug in ZFS. What're the underlying disks and RAID card? ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to postmaster@multiplay.co.uk.