From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 6 May 2001 08:39:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 6 May 2001 08:39:38 -0400 Received: from denise.shiny.it ([194.20.232.1]:23778 "EHLO denise.shiny.it") by vger.kernel.org with ESMTP id ; Sun, 6 May 2001 08:39:30 -0400 Message-ID: <3AF3E20D.94B62929@denise.shiny.it> Date: Sat, 05 May 2001 13:20:45 +0200 From: Giuliano Pochini X-Mailer: Mozilla 4.7 [en] (X11; I; Linux 2.4.3 ppc) X-Accept-Language: en MIME-Version: 1.0 To: Uwe Bonnes CC: linux-kernel@vger.kernel.org Subject: Re: Problems even with 512 block size MOs In-Reply-To: <15088.18199.487902.514295@hertz.ikp.physik.tu-darmstadt.de> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > recent 2.4 kernels have incredible bad performance for me when handling MO > drives. Going back 2.2 shows better performance. > Copying a 6.5 MByte file with cp returns nearly immediately on the > commandline, but umount nearly takes forever. Maximum rate detected by > xosview during umount was about 30 kByte. I have this one: Vendor: FUJITSU Model: MCD3130SS Rev: 0020 and it works very well with 2.4. 2.2 kernel perform really badly because of the famous merging problem. > Are all my MO disks rotten? Are the MO drives broken? Are my SCSI adapters > broken? Or is there a bug in the SCSI layer? No probs here. I have an Adaptec SCSI card. Bye.