On Sonntag, 13. September 2015 10:23:13 Alan Stern wrote: > 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? No, that's working fine without. > > 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. Hrmpf. Hopefully now... Thanks, Pete
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