From owner-freebsd-stable Tue Apr 30 12:36:37 2002 Delivered-To: freebsd-stable@freebsd.org Received: from sumax.dyndns.org (212-100-182-14.adsl.easynet.be [212.100.182.14]) by hub.freebsd.org (Postfix) with ESMTP id 4AA3237B417 for ; Tue, 30 Apr 2002 12:36:31 -0700 (PDT) Received: by sumax.dyndns.org (Postfix, from userid 1001) id 5096A1FD7; Tue, 30 Apr 2002 21:36:15 +0200 (CEST) Date: Tue, 30 Apr 2002 21:36:14 +0200 From: Chris Pockele To: Christopher Hall Cc: stable@freebsd.org Subject: Re: ata (cd) troubles Message-ID: <20020430213613.A780@freedaemon.home.lan> References: <200204300101.g3U11Lg6018433@x4.tucheng.generalresources.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <200204300101.g3U11Lg6018433@x4.tucheng.generalresources.com>; from hsw@acm.org on Tue, Apr 30, 2002 at 09:01:21AM +0800 X-Operating-System: FreeBSD 4.5-STABLE i386 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Tue, Apr 30, 2002 at 09:01:21AM +0800, Christopher Hall wrote: > > There are several threads that show similar problems with acd, and > there is a PR > > i386/37420: Copying large files from an IDE CD-ROM to a harddrive > causes a system lock-up. > > Some have had success by using atacontrol to change drive to dma mode. > This only reduces the frequency of the problem in my case. > Well, I've done that and it seems to help. No crash yet - although I haven't done really extensive testing yet. Anyway, the bug is still there - if I can do anything to help, just ask :). What is the difference between the mode setting (atacontrol) and the dma sysctl? Is the sysctl some default value? I enabled dma with atacontrol: # atacontrol mode 1 Master = WDMA2 Slave = WDMA2 # sysctl -a | grep dma hw.ata.ata_dma: 1 hw.ata.atapi_dma: 0 (still says 0 ?) The (ata) manpage is a bit unclear on this subject, how should this "sysctl" be changed? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message