Date: Fri, 23 Feb 2007 20:54:29 -0700 From: Scott Long <scottl@samsco.org> To: "M. Warner Losh" <imp@bsdimp.com> Cc: scsi@freebsd.org Subject: Re: Another usb umass question... Message-ID: <45DFB6F5.9090605@samsco.org> In-Reply-To: <20070223.203309.-1300543896.imp@bsdimp.com> References: <20070223.203309.-1300543896.imp@bsdimp.com>
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M. Warner Losh wrote: > OK. I have another umass qustion... > > I have two external USB enclosures that I've been using... One has a > DVD burner in it and the other has a real disk in it. I've found that > I've had some issues. umass, unpatched, seems to filter out many of > the SCSI commands that I want to use to burn DVDs and/or run smartmon > for the disk. Even with the slowness in usb I see on my amd64 box, it > still seems to be a faster drive than the ata dvd burner that came > with the laptop... > > I also know that there are ISSUES with many of the thumb drives which > is why the filters are in place. > > Is there some kind of middle ground that can accomidate both uses? Is > there some automated way of detecting these two different cases? > > Warner Yes, there is a more intelligent way to handle it, but it requires breaking umass into a USB front end and various ATA, MMC, RBC, and SBC backends, and/or doing the same in CAM core. Scott
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