same problem here with an external usb hard disk.
perfectly works under windows or after removing ehci_hcd (SLOW!).
udev patch doesn't solve.
dmesg:
usb 1-6: reset high speed USB device using ehci_hcd and address 3
usb 1-6: reset high speed USB device using ehci_hcd and address 3
usb 1-6: reset high speed USB device using ehci_hcd and address 3
usb 1-6: reset high speed USB device using ehci_hcd and address 3
usb 1-6: reset high speed USB device using ehci_hcd and address 3
usb 1-6: reset high speed USB device using ehci_hcd and address 3
usb 1-6: reset high speed USB device using ehci_hcd and address 3
usb 1-6: reset high speed USB device using ehci_hcd and address 3
usb 1-6: reset high speed USB device using ehci_hcd and address 3
lsusb:
Bus 001 Device 003: ID 067b:2507 Prolific Technology, Inc. PL2507 Hi-speed USB
to IDE bridge controller
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x067b Prolific Technology, Inc.
idProduct 0x2507 PL2507 Hi-speed USB to IDE bridge controller
bcdDevice 1.00
iManufacturer 1
iProduct 2
iSerial 3
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
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 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 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
--
USB Hard Drive Not Accessible, vol_id hangs
https://bugs.launchpad.net/bugs/264789
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