On Thu, Oct 11, 2012 at 11:03:54AM -0700, Sarah Sharp wrote: > You can buy an xHCI host controller with the NEC (Rensas) chipset it in. > You may be able to read the data sheets for the various cards and see > which chipset they're using. For example, doing a search for "nec usb > 3.0 card" on newegg.com brought up this: > > http://www.newegg.com/Product/Product.aspx?Item=N82E16815150161 > > There is a couple cheaper cards available with the NEC chipset, but the > reviews are full of people receiving dead cards, so I'd go with the more > expensive brand. > > Sorry about this! The NEC is one of the most stable hosts out there, so > I hope you can get one and enjoy a less buggy USB 3.0 experience. :-/ > > Sarah Sharp Sarah, I finally had occasion to experiment with this further, as more USB 3.0 devices have become available at decent prices. I discovered that, while the card reader would fail with strange errors, a 32 GB USB 3.0 flash drive from Patriot was able to write out a 4GB file of /dev/zero at 39.5 MiB / second without experiencing a single error. This makes me wonder if there could be a problem with the peripheral itself worth trying to identify. Upon connection and mount attempt you see this: [76008.931517] usb 4-1: reset SuperSpeed USB device number 3 using xhci_hcd [76008.946972] usb 4-1: Parent hub missing LPM exit latency info. Power management will be impacted. [76008.948441] xhci_hcd 0000:03:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff8803e7b87500 [76008.948447] xhci_hcd 0000:03:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff8803e7b87540 [76009.427691] sd 6:0:0:2: [sdj] Media Changed [76009.427696] sd 6:0:0:2: [sdj] [76009.427698] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [76009.427700] sd 6:0:0:2: [sdj] [76009.427702] Sense Key : Unit Attention [current] [76009.427707] sd 6:0:0:2: [sdj] [76009.427710] Add. Sense: Not ready to ready change, medium may have changed [76009.427712] sd 6:0:0:2: [sdj] CDB: [76009.427714] Write(10): 2a 00 00 00 80 00 00 00 08 00 [76009.427723] end_request: I/O error, dev sdj, sector 32768 [76009.427727] Buffer I/O error on device sdj1, logical block 0 [76009.427729] lost page write due to I/O error on sdj1 [76009.434558] sdj: sdj1 It's a bit different from what used to show up on the old kernel. No such errors appear with the Patriot drive either. Regards, Matthew. -- 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
