Hi all,
I run kubuntu feist with a 2.6.20 kernel.
The MoBo I have produces this as output for usbtree
/: Bus 04.Port 1: Dev 1, Class=root_hub, Drv=uhci_hcd/2p, 12M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Drv=uhci_hcd/2p, 12M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Drv=uhci_hcd/2p, 12M
|_ Port 1: Dev 2, If 0, Prod=Evoluent VerticalMouse 3, Class=HID,
Drv=usbhid, 1.5M
|_ Port 2: Dev 3, If 0, Prod=USB to ATA/ATAPI Bridge, Class=stor.,
Drv=usb-storage, 12M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Drv=uhci_hcd/2p, 12M
This indicates that the disk connected to the USB-ata bridge at port 2/device2
is a full speed device.
This confirmed by my dmesg output.
My second USB external disk also indicates 'full speed'.
The problem I encounter is that data transfer to my disk connected to the
usb-ata is slow. transfer rates of about 400 KB are max. In the beginning
it is fast (40 MB/Sec) but then it drops and sometimes even stalles.
The other external disk (also claimed to be full speed) seems to achieve
transfer speeds of 20-30 KB which seems OK.
I also see that uhci_hcd has taken control over my USB. is that OK knowing
that my board supports usb2.0 ?
If not, is it possible that the usb-ata bridge is not detected as a USB2.0
device ? If so, how can i make it detect it properly ?
Thanx
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