On Sun, 13 Sep 2015, Hans-Peter Jansen wrote: > > The usbmon trace clearly shows the problem: The card reader's firmware > > doesn't handle transfers larger than 64 KB properly. (That's a bit of > > a guess on my part; what the trace really shows is that transfers of > > length 120 KB and 72 KB failed whereas lengths 28 KB and below worked.) > > > > Anyway, you can supply a quirks parameter for the usb-storage module to > > force all transfers to be short: > > > > modprobe usb-storage quirks=8564:4000:m > > > > (That's the vendor and product IDs of your card reader, together with a > > flag to limit the Max number of sectors per transfer.) Does that fix > > the problem? > > Yes, sort of, thanks, Alan. Unfortunately, write operations render my (fairly > capable) desktop nearly unusable, stalls for a couple of seconds, switching > desktops take 10-20 secs, while write performance is abysmal for USB 3.0 SDXC > class 1 devices. > > But that got me going. I've updated the firmware on this device to TS26, and > now, it behaves better: it performs ok and the desktop is still usable. Cool. Does the new firmware still require the usb-storage quirk? > May I introduce another faulty device: Fantec AluPro U3 external 2,5" case > (Asmedia AS2105 controller) with a HGST HTS721010 7K1000 harddisk. I wasn't > able to locate any firmware for this device. > > Issue here is, the drive is continusly connecting and disconnecting: > > 2015-09-13T11:55:30.641698+02:00 xrated kernel: [171947.841309] usb 7-1: USB disconnect, device number 91 > 2015-09-13T11:55:30.853671+02:00 xrated kernel: [171948.053246] usb 7-1: new SuperSpeed USB device number 92 using xhci_hcd > 2015-09-13T11:55:30.864676+02:00 xrated kernel: [171948.065133] usb 7-1: New USB device found, idVendor=174c, idProduct=5106 > 2015-09-13T11:55:30.864681+02:00 xrated kernel: [171948.065134] usb 7-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1 > 2015-09-13T11:55:30.864682+02:00 xrated kernel: [171948.065136] usb 7-1: Product: AS2105 > 2015-09-13T11:55:30.864682+02:00 xrated kernel: [171948.065136] usb 7-1: Manufacturer: ASMedia > 2015-09-13T11:55:30.864683+02:00 xrated kernel: [171948.065137] usb 7-1: SerialNumber: JR10046P2HAJ8N > 2015-09-13T11:55:30.865663+02:00 xrated kernel: [171948.065961] usb-storage 7-1:1.0: USB Mass Storage device detected > 2015-09-13T11:55:30.865666+02:00 xrated kernel: [171948.066046] scsi host196: usb-storage 7-1:1.0 > 2015-09-13T11:55:30.867001+02:00 xrated mtp-probe: checking bus 7, device 92: "/sys/devices/pci0000:00/0000:00:14.0/usb7/7-1" > 2015-09-13T11:55:30.867182+02:00 xrated mtp-probe: bus: 7, device: 92 was not an MTP device > 2015-09-13T11:55:32.111692+02:00 xrated kernel: [171949.310429] usb 7-1: USB disconnect, device number 92 > 2015-09-13T11:55:32.323698+02:00 xrated kernel: [171949.522367] usb 7-1: new SuperSpeed USB device number 93 using xhci_hcd ... > usbmon log attached. It wasn't attached. Alan Stern -- 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
