Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754464AbXLSQHW (ORCPT ); Wed, 19 Dec 2007 11:07:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752223AbXLSQHJ (ORCPT ); Wed, 19 Dec 2007 11:07:09 -0500 Received: from iolanthe.rowland.org ([192.131.102.54]:59981 "HELO iolanthe.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752196AbXLSQHH (ORCPT ); Wed, 19 Dec 2007 11:07:07 -0500 Date: Wed, 19 Dec 2007 11:07:07 -0500 (EST) From: Alan Stern X-X-Sender: stern@iolanthe.rowland.org To: Dave Young cc: Andrew Morton , , , , , Subject: Re: 2.6.24-rc5-mm1 In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3307 Lines: 75 On Wed, 19 Dec 2007, Dave Young wrote: > I tested on another machine with kernel 2.6.24-rc2. And the result is > diffrent again. > Here is the result: > > 1. on 2.6.24-rc2, when I plugin the player the kernel reports below messages: > > usb-storage: waiting for device to settle before scanning > /*[lets mark the below part as part 1]*/ > scsi 0:0:0:0: Direct-Access Newman mp3 PQ: 0 ANSI: 0 CCS > sd 0:0:0:0: [sda] 245248 512-byte hardware sectors (126 MB) > sd 0:0:0:0: [sda] Write Protect is on > sd 0:0:0:0: [sda] Mode Sense: 03 00 80 00 > sd 0:0:0:0: [sda] Assuming drive cache: write through > sd 0:0:0:0: [sda] 245248 512-byte hardware sectors (126 MB) > sd 0:0:0:0: [sda] Write Protect is on > sd 0:0:0:0: [sda] Mode Sense: 03 00 80 00 > sd 0:0:0:0: [sda] Assuming drive cache: write through > sda: sda1 > /*[lets mark the below part as part 2]*/ > sd 0:0:0:0: [sda] Attached SCSI removable disk > usb-storage: device scan complete > sd 0:0:0:0: [sda] 245248 512-byte hardware sectors (126 MB) > sd 0:0:0:0: [sda] Write Protect is off > sd 0:0:0:0: [sda] Mode Sense: 03 00 00 00 > sd 0:0:0:0: [sda] Assuming drive cache: write through > sd 0:0:0:0: [sda] 245248 512-byte hardware sectors (126 MB) > sd 0:0:0:0: [sda] Write Protect is off > sd 0:0:0:0: [sda] Mode Sense: 03 00 00 00 > sd 0:0:0:0: [sda] Assuming drive cache: write through > sda: sda1 This is not normal. When you plug in a storage device you should get all of the messages in your part 1 plus the first two lines in your part 2, but not the rest of part 2. > 2. on 2.6.24-rc5 kernel reports only the part 1, after try mount the > disk it reports the part 2 and mount the partition as rw > > 3. on 2.6.24-rc5 kernel reports only the part 1, after try mount the > disk it just mount the partition as ro with nothing more messages. You must have a typo there. Those can't both be true for 2.6.24-rc5. In fact you shouldn't see part 2 at all. Here's what I get when I plug in a USB mass-storage device under 2.6.24-rc5: [ 87.903014] usb-storage: device found at 2 [ 87.909570] scsi 0:0:0:0: Direct-Access Memorex TD 2B 1.09 PQ: 0 ANSI: 0 CCS [ 87.913144] usb-storage: device scan complete [ 88.804031] sd 0:0:0:0: [sda] 243712 512-byte hardware sectors (125 MB) [ 88.805507] sd 0:0:0:0: [sda] Write Protect is off [ 88.805577] sd 0:0:0:0: [sda] Mode Sense: 03 00 00 00 [ 88.805639] sd 0:0:0:0: [sda] Assuming drive cache: write through [ 88.809526] sd 0:0:0:0: [sda] 243712 512-byte hardware sectors (125 MB) [ 88.810421] sd 0:0:0:0: [sda] Write Protect is off [ 88.810488] sd 0:0:0:0: [sda] Mode Sense: 03 00 00 00 [ 88.810575] sd 0:0:0:0: [sda] Assuming drive cache: write through [ 88.810641] sda: sda1 [ 88.812450] sd 0:0:0:0: [sda] Attached SCSI removable disk [ 89.041014] sd 0:0:0:0: Attached scsi generic sg0 type 0 Mounting the disk produces no extra output at all. I get the same result under 2.6.23 and earlier operating systems. You should see approximately the same thing. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/