Messages in this thread | | | From | Matthew Dharm <> | Date | Tue, 31 Jan 2012 10:22:53 -0800 | Subject | Re: USB storage quirk |
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The 'rw' sets the flags to "ignore residue" and "skip write-protect checking". Are both flags really needed?
Matt
On Tue, Jan 31, 2012 at 2:44 AM, Russell Strong <russell@strong.id.au> wrote: > Hi Matthew, > > I pulled you name from the kernel maintainers file to let someone know > about a quirk that I discovered with an MP3 player that connects as > usb-storage. Hope I've got this right. > > When I connected it to my fedora 8/14/16 machine ( sorry not the > latest kernel ) it didn't work. The following is the dmesg output: > > [ 1703.287204] usb 2-1: new high speed USB device using ehci_hcd and address 4 > [ 1703.402018] usb 2-1: New USB device found, idVendor=1e74, idProduct=4641 > [ 1703.402025] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 > [ 1703.402030] usb 2-1: Product: USB > [ 1703.402034] usb 2-1: Manufacturer: > [ 1703.402037] usb 2-1: SerialNumber: USBV1.00 > [ 1703.402840] scsi5 : usb-storage 2-1:1.0 > [ 1704.403915] scsi 5:0:0:0: Direct-Access USB DISK > 1.00 PQ: 0 ANSI: 0 > [ 1704.409525] sd 5:0:0:0: Attached scsi generic sg3 type 0 > [ 1704.411604] sd 5:0:0:0: [sdc] 15958016 512-byte logical blocks: > (8.17 GB/7.60 GiB) > [ 1704.514300] usb 2-1: reset high speed USB device using ehci_hcd and address 4 > [ 1709.628307] usb 2-1: device descriptor read/all, error -110 > [ 1709.730154] usb 2-1: reset high speed USB device using ehci_hcd and address 4 > .... > > So I played around with the usb-storage parameter quirks, and found > that 1e74:4641:rw worked a treat. Hope this is helpful. > > For all the others googling for this : > Dick Smith Electronics MP3 player 8GB > DSE > A8705 > add kernel command line parameter usb-storage.quirks=1e74:4641:rw > > Regards, > Russell
-- Matthew Dharm Maintainer, USB Mass Storage driver for Linux -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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