From owner-freebsd-stable Fri Mar 31 21:44:35 2000 Delivered-To: freebsd-stable@freebsd.org Received: from evil.2y.net (ztown1-1-55.adsl.one.net [207.78.254.55]) by hub.freebsd.org (Postfix) with ESMTP id D34FD37BAF4 for ; Fri, 31 Mar 2000 21:44:21 -0800 (PST) (envelope-from cokane@evil.2y.net) Received: (from cokane@localhost) by evil.2y.net (8.9.3/8.9.3) id AAA06933; Sat, 1 Apr 2000 00:49:01 -0500 (EST) (envelope-from cokane) Date: Sat, 1 Apr 2000 00:49:01 -0500 From: Coleman Kane To: Grigoriy Strokin Cc: Jason Garman , Thomas K?llmann , freebsd-stable@FreeBSD.ORG Subject: Re: New kernel with its ATA drivers damages the filesystem Message-ID: <20000401004901.B6904@evil.2y.net> References: <20000331022130.A4045@isabase.philol.msu.ru> <20000331142357.A1291@home.net> <20000331163527.B24581@got.wedgie.org> <20000401013959.A48268@isabase.philol.msu.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0.1i In-Reply-To: <20000401013959.A48268@isabase.philol.msu.ru>; from grg@philol.msu.ru on Fri, Mar 31, 2000 at 04:41:22PM -0500 X-Vim: vim:tw=70:ts=4:sw=4 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Grigoriy Strokin had the audacity to say: > Interestingly, commenting out this option doesn't affect the mode for my CD-ROM > either. > > sysctl reports > hw.atamodes: dma,---,dma,---, > > First dma is for ad0, second for acd0. > > And dmesg reports using UDMA-33 for CDROM, too. > > acd0: CDROM at ata1-master using UDMA33 > I beleive it only applies to Multi-Word DMA, or MWDMA for short, the predecessor to UDMA. Although, I could be wrong, but you had two choices back then. They were mwdma and PIO basically. Each had it's pro's and con's. Now you can do UDMA, which is drastically different from MWDMA, and should be considered a different operating mode. --cokane To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message