Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268355AbUJUQYx (ORCPT ); Thu, 21 Oct 2004 12:24:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262085AbUJUQYp (ORCPT ); Thu, 21 Oct 2004 12:24:45 -0400 Received: from math.ut.ee ([193.40.5.125]:48591 "EHLO math.ut.ee") by vger.kernel.org with ESMTP id S268839AbUJUQTe (ORCPT ); Thu, 21 Oct 2004 12:19:34 -0400 Date: Thu, 21 Oct 2004 19:19:31 +0300 (EEST) From: Meelis Roos To: Jens Axboe cc: Linux Kernel list Subject: Re: readcd hangs in blk_execute_rq In-Reply-To: <20041021161100.GA14154@suse.de> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1217 Lines: 32 > > > > ide-cd: cmd 0x28 timed out > > > > hdc: DMA interrupt recovery > > > > hdc: lost interrupt > > > > hdc: status timeout: status=0xd0 { Busy } > > > > hdc: status timeout: error=0x00 > > > > hdc: DMA disabled > > > > hdc: drive not ready for command > > > > hdc: ATAPI reset complete > > It worked in earlier 2.4 kernels (2.4.18?) with DMA - I don't remember > > if it had some reliability problems. Since then, it's no dma. We have 3 > > such computers here (Intel D816EEA2 mainboard, this specific Sony CDrom) > > and they all behave the same. > > 2.4.x never used dma for this operation. Does 2.6.9 work if you turn off > dma first? I have not tried this operation before. Reading data disks with DMA worked and that's what I have used. I did read the same disk with readdisk subcommand on readcd currently, it was successful until the end of disk (6xx MB - maybe the end of the disk). Will try it with turning DMA off first. -- Meelis Roos (mroos@linux.ee) - 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/