Date: Fri, 14 Jan 2000 14:03:42 +0100 (CET) From: Soren Schmidt <sos@freebsd.dk> To: darius@dons.net.au (Daniel J. O'Connor) Cc: current@FreeBSD.ORG, vova@express.ru Subject: Re: ATAPI CDROM trouble Message-ID: <200001141303.OAA04565@freebsd.dk> In-Reply-To: <XFMail.000114232854.darius@dons.net.au> from "Daniel J. O'Connor" at "Jan 14, 2000 11:28:54 pm"
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It seems Daniel J. O'Connor wrote: > > On 14-Jan-00 Soren Schmidt wrote: > > Dont define this until you know the drive is functioning otherwise, > > LOTS and I mean LOTS of atapi devices dont do DMA even if advertised. > > Would it be possible to implement this as something like a 'quirk list'? > > ie list known good (or bad) drives and enable (or disable) DMA on them. It would have to be a list of known good drives on known working chipsets, in effect a list that would be next to impossible to maintain. If you have ATAPI hw that are more than 6-12month old, bets are it wont work, newer devices seems more capable, but still alot of them claim to support DMA, but fail utterly always or on some chipset combinations. The only way to know is to try it out and see for yourself, the ATAPI device manufactures should have thier fingers smacked, hard .... -Søren To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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