Date: Tue, 30 Apr 2002 21:36:14 +0200 From: Chris Pockele <chrisp@belgacom.net> To: Christopher Hall <hsw@acm.org> Cc: stable@freebsd.org Subject: Re: ata (cd) troubles Message-ID: <20020430213613.A780@freedaemon.home.lan> In-Reply-To: <200204300101.g3U11Lg6018433@x4.tucheng.generalresources.com>; from hsw@acm.org on Tue, Apr 30, 2002 at 09:01:21AM %2B0800 References: <chrisp@belgacom.net> <200204300101.g3U11Lg6018433@x4.tucheng.generalresources.com>
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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
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