Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263894AbTGBLCw (ORCPT ); Wed, 2 Jul 2003 07:02:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264047AbTGBLCw (ORCPT ); Wed, 2 Jul 2003 07:02:52 -0400 Received: from ns.virtualhost.dk ([195.184.98.160]:35757 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id S263894AbTGBLCu (ORCPT ); Wed, 2 Jul 2003 07:02:50 -0400 Date: Wed, 2 Jul 2003 13:17:08 +0200 From: Jens Axboe To: DervishD Cc: Linux-kernel Subject: Re: Slow writer... Message-ID: <20030702111708.GB839@suse.de> References: <20030701213036.GB239@DervishD> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030701213036.GB239@DervishD> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2108 Lines: 54 On Tue, Jul 01 2003, DervishD wrote: > Hi all :)) > > I've installed a PlexWriter Premium (52x) in my system, and the > highest speed I can achieve with it is 24x with data and 15x with > audio (the speed difference is quite strange :??). The hard disk is > UDMA5, so it should provide the data at 52x. This is the info for the > hard disk: > > /dev/root: > > Model=ST340016A, FwRev=3.05, SerialNo=3HS040AC > Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% } > RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4 > BuffType=unknown, BuffSize=2048kB, MaxMultSect=16, MultSect=16 > CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=78165360 > IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120} > PIO modes: pio0 pio1 pio2 pio3 pio4 > DMA modes: mdma0 mdma1 mdma2 > UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 > AdvancedPM=no WriteCache=enabled > Drive conforms to: device does not report version: 1 2 3 4 5 > > As you can see, the udma5 mode is active, and this is a test from > hdparm on the same disk: > > /dev/root: > Timing buffered disk reads: 64 MB in 1.58 seconds = 40.51 MB/sec > > Am I doing something wrong, like not tuning correctly something > in the disk? I am using a DIY box with Linux 2.4.21, CPU Duron 850, > and no processes are running while burning in order to not disturb > the writing process. I'm afraid that DMA is not working properly or > maybe the motherboard is damaged or something like that :?? Questions: - Is the cd writer on a different channel? - What ide adapter are you using? - Is dma enabled on the cd writer? - What cdrecord version are you using? You should try 2.5.73 as well and see if it makes any difference. Make sure to use -dev=/dev/hdc (or whatever your cd-rw drive is) and _don't_ use ide-scsi (just ide-cd) -- Jens Axboe - 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/