On Thu, Jan 30, 2014 at 08:36:04AM -0800, Jay S wrote: > Hi Sarah, > > I haven't tried using a USB 2.0 cable to attach the dock/drive, but > I have disabled XHCI in my BIOS and the dock and 1 TB drive work > fine at USB 2.0 speeds using EHCI. According to the manufacturer, > the dock is designed for drives up to 4 TB. Ok, I'll admit I'm stumped on this bug. The failure happens as we set the device configuration, before any SCSI commands, so it can't be usb-storage or the SCSI layer's fault. We don't enable USB 3.0 Link PM until after the configuration is set, so it shouldn't be related to that. Dan might be able to come up with a patchset to blanket disable Link PM on Intel hosts for you to test, just to rule it out. It's also possible the drive is expecting a different enumeration sequence. We changed the enumeration sequence under xHCI to match the Windows enumeration sequence, but only for USB 1.1/2.0 devices, not USB 3.0 devices. Perhaps this device needs the Windows enumeration sequence, but only when the 1 TB drive is attached? Both hypothesis seem far-fetched, but Dan might be able to help you figure out what the issue is. Sarah Sharp > On 01/29/2014 06:33 PM, Sarah Sharp wrote: > >On Wed, Jan 22, 2014 at 08:51:31AM -0800, Jay S wrote: > >>Actually, the USB3 device I'm using, a Unitek Y-1072 HDD dock, works > >>fine with a WD 500 GB drive using XHCI, so it seems like it's > >>something to do with the larger drive. > >> > >>I have also tried with a Rosewill RX35-AT-SU3 external enclosure and > >>a Rosewill RX-DU300 HDD dock. All failed with the 1 TB drive. > >>Transcend 16 GB flash drives work fine with XHCI, too. > >> > >>As noted in my problem description, I RMA'd the 1 TB drive and the > >>replacement drive fails with the same error, though it too works > >>with USB2 via EHCI. > >Have you tried connecting the drive with a USB 2.0 cable to the xHCI > >port? That would be good to rule out issues with xHCI vs EHCI. Perhaps > >the dock simply isn't designed to work with the bigger drive at USB 3.0 > >speeds? > > > >Sarah Sharp > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
