From owner-freebsd-stable Wed Apr 5 2:36:43 2000 Delivered-To: freebsd-stable@freebsd.org Received: from mail.nyct.net (bsd4.nyct.net [204.141.86.6]) by hub.freebsd.org (Postfix) with ESMTP id 739E237B9C6 for ; Wed, 5 Apr 2000 02:36:40 -0700 (PDT) (envelope-from efutch@nyct.net) Received: from bsd1.nyct.net (efutch@bsd1.nyct.net [204.141.86.3]) by mail.nyct.net (8.8.8/8.8.7) with ESMTP id FAA19884; Wed, 5 Apr 2000 05:36:33 -0400 (EDT) (envelope-from efutch@nyct.net) Date: Wed, 5 Apr 2000 05:36:33 -0400 (EDT) From: "Eric D. Futch" To: Edwin Mons Cc: freebsd-stable@FreeBSD.ORG Subject: Re: ata sad combinatorics In-Reply-To: <38E9EFE2.7F62E91E@spcgroup.nl> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Linux has it's "Black List" of ATA hard drivers that have brokem UDMA support. Someone, probably Soren, made some reference to it once on one of the mailing lists. It lists the drive make/model number and what PIO mode to fall back to. Atleast that's my understanding.. I don't play with Linux nearly as much as FreeBSD :) Maybe someone could make some useful documentation on what to expect if your drive is listed. See linux/drivers/block/ide_modes.h from the Linux Kernel sources or http://quake.nyct.net/~efutch/ide_modes.h The version of ide_modes.h I stuck on the web is from version 2.2.12 which is probably a little stale :) -- Eric Futch New York Connect.Net, Ltd. efutch@nyct.net Technical Support Staff http://www.nyct.net (212) 293-2620 "Bringing New York The Internet Access It Deserves" On Tue, 4 Apr 2000, Edwin Mons wrote: >I've seen similar problems with a machine with an old VIA chipset. >FWIW: I think we need a way to tell the kernel before booting that it >shouldn't even try to use DMA/UDMA. Something like the good old device >flags.. > >Regards, >Edwin Mons To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message