I have a 4gb unbranded USB stick which I am unable to access. The control IC is an AU6986 and the two memory ICs are: SAMSUNG 822 (K9GAG08U0M). Using a program called USBVIEW came up with the following info, see below.
 
I recognize some of the info only.
 
When inserting the usb into a computer, the light on the usb begins to flash ON and OFF and then stays constantly ON. On a normal usb, the light should stay OFF and flash ON and OFF when info is being read or written to it.
 
Can I assume from the info below that the control IC is OK or partially OK (can this situation exist?)
 
USB is detected but showing zero bytes. The message that comes up when trying to open the USB is: "Please insert a disk into drive F:" or what ever drive is assigned to the USB port.
 
Else where, it has being suggested the MBR (Master Boot Record) may be corrupt.
 
Any suggestions how to access the data on the USB, tries several programs, without success, the light on the USB stays on.
 
 
 
Device Descriptor:
bcdUSB: 0x0200
bDeviceClass: 0x00
bDeviceSubClass: 0x00
bDeviceProtocol: 0x00
bMaxPacketSize0: 0x40 (64)
idVendor: 0x058F (Alcor Micro, Inc.)
idProduct: 0x1234
bcdDevice: 0x0001
iManufacturer: 0x01
0x0409: "Alcor Micro"
iProduct: 0x02
0x0409: "Mass Storage Device"
iSerialNumber: 0x00
bNumConfigurations: 0x01
 
ConnectionStatus: DeviceConnected
Current Config Value: 0x01
Device Bus Speed: High
Device Address: 0x02
Open Pipes: 2
 
Endpoint Descriptor:
bEndpointAddress: 0x01 OUT
Transfer Type: Bulk
wMaxPacketSize: 0x0200 (512)
bInterval: 0x00
 
Endpoint Descriptor:
bEndpointAddress: 0x82 IN
Transfer Type: Bulk
wMaxPacketSize: 0x0200 (512)
bInterval: 0x00
 
Configuration Descriptor:
wTotalLength: 0x0020
bNumInterfaces: 0x01
bConfigurationValue: 0x01
iConfiguration: 0x00
bmAttributes: 0x80 (Bus Powered )
MaxPower: 0x32 (100 Ma)
 
Interface Descriptor:
bInterfaceNumber: 0x00
bAlternateSetting: 0x00
bNumEndpoints: 0x02
bInterfaceClass: 0x08
bInterfaceSubClass: 0x06
bInterfaceProtocol: 0x50
iInterface: 0x00
 
Endpoint Descriptor:
bEndpointAddress: 0x01 OUT
Transfer Type: Bulk
wMaxPacketSize: 0x0200 (512)
bInterval: 0x00
 
Endpoint Descriptor:
bEndpointAddress: 0x82 IN
Transfer Type: Bulk