On Mon, Aug 04, 2008 at 03:10:04AM +0200, Douglas Gilbert wrote: > Alan Stern has already noted to another smartmontools developer > that such a change is likely to break some USB storage devices. > Perhaps the maximum sense buffer size could be optionally > specified per usb storage device. Alternatively the usb mass > storage logic could make some dynamic decisions itself. To clarify: A great many devices choke (fatally) if asked for sense data other than 18 bytes. Since the first TEST_UNIT_READY will likely require sense data, almost every device sees REQUEST_SENSE. Personally, I hate having to make dynamic decisions in usb-storage. The more we try to do there, the more likely we are to get it wrong. If you've got an app that is sending a command, and you KNOW that command should produce >18 bytes of sense data, then there should be a way to specify to the SCSI core (and thus get passed to usb-storage) that sense data of >18 bytes should be requested. Matt -- Matthew Dharm Home: mdharm-usb@xxxxxxxxxxxxxxxxxx Maintainer, Linux USB Mass Storage Driver I'm seen in many forms. Now open your mouth. It's caffeine time. -- Cola Man to Greg User Friendly, 10/28/1998
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