From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758861Ab3K1NAC (ORCPT ); Thu, 28 Nov 2013 08:00:02 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:48224 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751213Ab3K1M77 (ORCPT ); Thu, 28 Nov 2013 07:59:59 -0500 To: Justin Piszcz Cc: open list , linux-ext4@vger.kernel.org, linux-scsi@vger.kernel.org Subject: Re: 3.12.0: sda2: WRITE SAME failed. Manually zeroing. with 3w-xxxx driver From: "Martin K. Petersen" Organization: Oracle Corporation References: Date: Thu, 28 Nov 2013 07:59:53 -0500 In-Reply-To: (Justin Piszcz's message of "Mon, 25 Nov 2013 17:01:12 -0500") Message-ID: User-Agent: Gnus/5.130005 (Ma Gnus v0.5) Emacs/24.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Source-IP: acsinet22.oracle.com [141.146.126.238] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >>>>> "Justin" == Justin Piszcz writes: Justin> Relevant logs: [178339.353519] 3w-sas: scsi0: ERROR: Justin> (0x03:0x0101): Invalid command opcode:opcode=0x41. Justin> [178339.353565] sda2: WRITE SAME failed. Manually zeroing. Justin> Is this something I should be worried about? No, it just means that your 3ware controller does not handle the WRITE SAME command and we fall back to manually writing out zeroes. I posted a patch a while back that prevents WRITE SAME being issued for controllers that do not pass the commands through to disk directly: http://marc.info/?l=linux-scsi&m=138252394614920&w=2 -- Martin K. Petersen Oracle Linux Engineering