From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932213AbWJTI4O (ORCPT ); Fri, 20 Oct 2006 04:56:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932216AbWJTI4O (ORCPT ); Fri, 20 Oct 2006 04:56:14 -0400 Received: from nf-out-0910.google.com ([64.233.182.184]:6035 "EHLO nf-out-0910.google.com") by vger.kernel.org with ESMTP id S932213AbWJTI4M (ORCPT ); Fri, 20 Oct 2006 04:56:12 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:user-agent:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding; b=MK+f2o8r8xMV5rKl+AC443viUxgU2czN0I2HAdeCUCGkdRRaFTvQQAbv/54QWzLricQMmCIL2+RR6NZNd3fPcas6P7jwLaZOwme+/Lb8HsOQG6tTVWBB9DljKf34i+7wAwFxFiTckVyps7iyrSsTUNfJg3RGRwbMyfuJwBVeNOA= Message-ID: <45388F24.6000407@gmail.com> Date: Fri, 20 Oct 2006 17:56:04 +0900 From: Tejun Heo User-Agent: Thunderbird 1.5.0.7 (X11/20060928) MIME-Version: 1.0 To: Mark Lord CC: Robert Wruck , IDE/ATA development list , linux-kernel@vger.kernel.org Subject: Re: [2.6.19-rc2] SATA boot problems References: <4537697C.7080500@tweerlei.de> <4537DEFC.5050404@rtr.ca> In-Reply-To: <4537DEFC.5050404@rtr.ca> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Mark Lord wrote: > Hi. I'm copying your posting for the linux-ide mailing list, > where the libata designers hang out. > > Robert Wruck wrote: >> Hi, >> >> I'm having problems booting from a SATA disk with 2.6.19-rc2. >> Grub loads fine, but when the kernel boots, it *sometimes* ends up with >> VFS: Cannot open root device "sda5" or unknown-block(0,0) >> >> The strange thing is that this happens only in 2/3 of the boot attempts. >> If I reset the machine, the next attempt is likely to succeed. >> I first noted this when switching from 2.6.17 (2.6.17.11, IIRC) to >> 2.6.18 and it persists in 2.6.19-rc2 (Windows does not encounter similar >> problems on the same machine). >> >> I attached a diff of a successful and an unsuccessful netconsole log >> below. It seems that the drive is sometimes simply not detected... >> I'm not using an initrd and changing the kernel command line from >> root=/dev/sda5 to root=0x0805 did not help. >> >> The controller is: >> 00:1f.2 IDE interface: Intel Corporation 82801FB/FW (ICH6/ICH6W) SATA >> Controller (rev 03) >> >> Any ideas? Please CC me, as I'm not subscribed. >> Robert Can you give a shot at the latest -mm (2.6.19-rc2-mm2)? It contains device-detection-via-polling which is supposed to fix problems similar to yours. -- tejun