From owner-freebsd-questions@FreeBSD.ORG Thu Jul 18 14:26:43 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id D61857B1 for ; Thu, 18 Jul 2013 14:26:43 +0000 (UTC) (envelope-from sam.gh1986@gmail.com) Received: from mail-lb0-x22f.google.com (mail-lb0-x22f.google.com [IPv6:2a00:1450:4010:c04::22f]) by mx1.freebsd.org (Postfix) with ESMTP id 63B4D14F for ; Thu, 18 Jul 2013 14:26:43 +0000 (UTC) Received: by mail-lb0-f175.google.com with SMTP id r10so2597145lbi.34 for ; Thu, 18 Jul 2013 07:26:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=1VF/977yulBqA6OOERV343xVt05RqOgGAkRIvisoNIM=; b=DcGpO//OwN13xyuIcQhfWYv66gfE/Ffixn3POH17VNUuYbHMbwZOurGyd25gFTEFZU 1UFdKzKVvo2hpiDSBEO7ig4Fp/u07ViGiiLPRQAQkS/HKC9hWmZj13wpxQadZrjWSKGw Q4rxrJVUSdXPZJivZiEJh881DjDoBPvVuMIJx+81LcvuD9kWy9S2ZSPBG+ZTmVkGlSXG Vvf1PskBv+Mo/F3nazp4/Z5HJ1jq2RvNcOUoYEbW6S59EKVdKPdAxXpAGlDnn9WOjKxr fu7991sgk9WDYYQTmzlg6wmkSqx7u79CkemPAxpljk9nM0MaRLr7gU294MV5jtHrfS0z Rltw== MIME-Version: 1.0 X-Received: by 10.112.20.66 with SMTP id l2mr5576686lbe.48.1374157602194; Thu, 18 Jul 2013 07:26:42 -0700 (PDT) Received: by 10.112.67.135 with HTTP; Thu, 18 Jul 2013 07:26:42 -0700 (PDT) Date: Thu, 18 Jul 2013 18:56:42 +0430 Message-ID: Subject: does journaling cause DMA-WRITE failure? From: s m To: freebsd-questions Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.14 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Jul 2013 14:26:43 -0000 hello all, i have freebsd8.2 on my system with journaled gpt partitions. occasionally, i see the below errors in startup and system doesn't boot correctly. if i restart system, it boot normally and every thing is ok. these errors are: ad3: WARNING - WRITE_DMA requeued due to channel reset LBA=635411 ad3: WARNING - READ_DMA requeued due to channel reset LBA=635411 ata1: FAILURE - already active DMA on this device ata1: setting up DMA failed ad3: WARNING - WRITE_DMA requeued due to channel reset LBA=635411 ata1: FAILURE - already active DMA on this device and these errors are shown repeatedly. i have two question: does journaling cause to happen these errors? and if i set hw.ata.ata_dma to 0, is it resolve the problem? if yes, has it any side effect or not? any comments or hints are really appreciated. SAM