From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: Again... DMA speed too slow Date: Sun, 13 Apr 2008 11:23:48 +0900 Message-ID: <48016EB4.1070804@gmail.com> References: <20080330235357.20a54963@werewolf> <20080402001640.41c103a7.akpm@linux-foundation.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from wa-out-1112.google.com ([209.85.146.183]:34319 "EHLO wa-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752556AbYDMCYK (ORCPT ); Sat, 12 Apr 2008 22:24:10 -0400 Received: by wa-out-1112.google.com with SMTP id m16so1391844waf.23 for ; Sat, 12 Apr 2008 19:24:10 -0700 (PDT) In-Reply-To: <20080402001640.41c103a7.akpm@linux-foundation.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Andrew Morton Cc: =?ISO-8859-1?Q?=22J=2EA=2E_Magall=F3n=22?= , "Linux-Kernel, " , linux-ide@vger.kernel.org Andrew Morton wrote: > On Sun, 30 Mar 2008 23:53:57 +0200 "J.A. Magall=F3n" wrote: >=20 >> Hi all... >> >> I have tried to burn some data from the commandline with wodim (sinc= e time >> ago I just used beasero...), and I have noticed this (media is CD, n= ot DVD): >> >> Vendor_info : 'HL-DT-ST' >> Identification : 'DVDRAM GSA-H10N ' >> Revision : 'JL12' >> Device seems to be: Generic mmc2 DVD-R/DVD-RW. >> Using generic SCSI-3/mmc CD-R/CD-RW driver (mmc_cdr). >> Driver flags : MMC-3 SWABAUDIO BURNFREE >> Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P R= AW/R96R >> Speed set to 8467 KB/s >> wodim: DMA speed too slow (OK for 5x). Cannot write at speed 48x. >> Starting to write CD/DVD at speed 48.0 in real TAO mode for single = session. >> >> I just can burn CDs at 5x ?? >> But then the program tries to write at 48x. >> It the DMA message really true ? Which controller are you on? I bet the recording itself will work fine= =20 on 48x. It's probably that READ/WRITE BUFFERs are executed using PIO=20 for compatibility reasons. --=20 tejun