On Thu, 13 Sep 2007, Mark Lord wrote: > Alan Stern wrote: > > On Wed, 12 Sep 2007, Mark Lord wrote: > > > >> Chuck Ebbert wrote: > .. > >>> Oh, nice. The usb-storage (SCSI) disk spins itself down and we can't handle that. > >>> Should we be disabling auto-spindown when we connect the device, or be able to > >>> handle this by sending the start command when needed? > >> There's more to this. > >> > >> My Sandisk Cruzer Micro 1GB USB sticks suffer from this regression. > > > > I seriously doubt that. Are you claiming that your USB stick spins > > itself down during a suspend? And then requires to be spun back up > > before it will resume proper operation? > > No, the machine is not being suspended at all. > > What happens is, there's a nice little LED on the Cruzer stick, > that is "lit" when the stick itself is not in a "power suspend" state > (or whatever you USB folks call it). We call it "suspended". (Wasn't there an episode of Classic Trek where Mr. Spock explained to somebody, "I call them `ears'."?) > On 2.6.22, that little LED stays "on" normally, and flickers off/on > when data is being transfered. > > The new "USB autosuspend" logic in 2.6.23 now causes that little LED > to turn off after a few seconds of inactivity. > > Once that happens, the USB stick is not accessible until after a longish > timeout (~30s I think), followed by a USB reset. Then it is usable again > until the next inactivity timeout and autosuspend (a few seconds). So this _isn't_ the regression described above -- to wit, that the drive gets spun down and then won't work without first being spun back up. You wrote: > >> My Sandisk Cruzer Micro 1GB USB sticks suffer from this regression. But it doesn't. It suffers from a different regression. Alan Stern - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
