USB mass storage device slow in Gentoo, fast in Windows...?
Have you received a lot of debugging messages at the output of dmesg
when copying files?
Hung
On 12/26/09 15:54, Paul Hartman wrote:
> Hi,
>
> I got a Nokia N900 linux internet tablet/phone a few days ago, and
> when I connect it in USB Mass Storage mode to a Windows Vista computer
> I can write at 17MB/sec, but when I connect it to my Gentoo box my
> writes are really slow, between 500-900kb/sec depending on if I mount
> in "sync" mode or not. As far as I know it should be just a totally
> standard/generic mass storage device. (there were no drivers or
> software install needed in windows, it just worked)
>
> Other USB devices plugged into the same port go full speed, and AFAIK
> everything appears as if it should be high speed USB 2.0. Has anyone
> seen something like this before? I'm not sure what the deal is. It
> takes 20 minutes to copy 1 gigabyte from Linux and takes just under 1
> minute to do the same in Windows.
>
> I'm not sure about debugging USB or what the options are. Everything
> I've used previously has worked without any hassle.
>
> lsusb -vv output for this device:
>
> Bus 001 Device 031: ID 0421:01c7 Nokia Mobile Phones
> Device Descriptor:
> bLength 18
> bDescriptorType 1
> bcdUSB 2.00
> bDeviceClass 0 (Defined at Interface level)
> bDeviceSubClass 0
> bDeviceProtocol 0
> bMaxPacketSize0 64
> idVendor 0x0421 Nokia Mobile Phones
> idProduct 0x01c7
> bcdDevice 3.16
> iManufacturer 1 Nokia
> iProduct 2 N900 (Storage Mode)
> iSerial 3 (censored)
> bNumConfigurations 2
> Configuration Descriptor:
> bLength 9
> bDescriptorType 2
> wTotalLength 32
> bNumInterfaces 1
> bConfigurationValue 1
> iConfiguration 4 Max power
> bmAttributes 0x80
> (Bus Powered)
> MaxPower 500mA
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 0
> bNumEndpoints 2
> bInterfaceClass 8 Mass Storage
> bInterfaceSubClass 6 SCSI
> bInterfaceProtocol 80 Bulk (Zip)
> iInterface 6 Mass Storage
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0200 1x 512 bytes
> bInterval 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x01 EP 1 OUT
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0200 1x 512 bytes
> bInterval 1
> Configuration Descriptor:
> bLength 9
> bDescriptorType 2
> wTotalLength 32
> bNumInterfaces 1
> bConfigurationValue 2
> iConfiguration 5 Self-powered
> bmAttributes 0xc0
> Self Powered
> MaxPower 100mA
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 0
> bNumEndpoints 2
> bInterfaceClass 8 Mass Storage
> bInterfaceSubClass 6 SCSI
> bInterfaceProtocol 80 Bulk (Zip)
> iInterface 6 Mass Storage
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0200 1x 512 bytes
> bInterval 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x01 EP 1 OUT
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0200 1x 512 bytes
> bInterval 1
> Device Qualifier (for other device speed):
> bLength 10
> bDescriptorType 6
> bcdUSB 2.00
> bDeviceClass 0 (Defined at Interface level)
> bDeviceSubClass 0
> bDeviceProtocol 0
> bMaxPacketSize0 64
> bNumConfigurations 2
> Device Status: 0x0000
> (Bus Powered)
>
>
>
> dmesg output when it is plugged in:
>
> [2920730.031010] usb 1-4: new high speed USB device using ehci_hcd and
> address 31
> [2920730.146451] usb 1-4: New USB device found, idVendor=0421, idProduct=01c7
> [2920730.146455] usb 1-4: New USB device strings: Mfr=1, Product=2,
> SerialNumber=3
> [2920730.146458] usb 1-4: Product: N900 (Storage Mode)
> [2920730.146460] usb 1-4: Manufacturer: Nokia
> [2920730.146462] usb 1-4: SerialNumber: (censored)
> [2920730.146540] usb 1-4: configuration #1 chosen from 2 choices
> [2920730.148268] scsi27 : SCSI emulation for USB Mass Storage devices
> [2920730.148342] usb-storage: device found at 31
> [2920730.148345] usb-storage: waiting for device to settle before scanning
> [2920735.150436] scsi 27:0:0:0: Direct-Access Nokia N900
> 031 PQ: 0 ANSI: 2
> [2920735.150567] sd 27:0:0:0: Attached scsi generic sg7 type 0
> [2920735.155882] sd 27:0:0:0: [sdg] Attached SCSI removable disk
> [2920735.156449] usb-storage: device scan complete
> [2920741.306353] sd 27:0:0:0: [sdg] 56631296 512-byte logical blocks:
> (28.9 GB/27.0 GiB)
> [2920741.306721] sd 27:0:0:0: [sdg] Assuming drive cache: write through
> [2920741.307970] sd 27:0:0:0: [sdg] Assuming drive cache: write through
> [2920741.307972] sdg:
>
>
> And I mounted with these options:
> /dev/sdg /mnt/usb vfat
> user,sync,umask=1000,rw,noauto,check=relaxed 0 0
>
>
> thanks
> paul
>
>
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