I am trying to load a USB All in One reader SD/CF/MS/SM/MMC/TF/xD
and have successfully loaded other usb-sticks, but this one only mounts with a 
SD card plugged in.

I can not get it to mount with CF or MS. it gives the following error.
How can I determine if this is a software or hardware problem?
Is this device supported?

# cat /proc/bus/usb/devices
T:  Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  3 Spd=12  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=058f ProdID=6362 Rev= 1.26
S:  Manufacturer=Generic
S:  Product=Mass Storage Device
S:  SerialNumber=058F312D81B
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E:  Ad=01(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms

# lsusb
Bus 001 Device 002: ID 058f:6362 Alcor Micro, Inc.
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 Interface
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x058f Alcor Micro, Inc.
  idProduct          0x6362
  bcdDevice            1.26
  iManufacturer           1 Generic
  iProduct                2 Mass Storage Device
  iSerial                 3 058F312D81B
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           32
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x80
    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
        wMaxPacketSize         64
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               none
        wMaxPacketSize         64
        bInterval               0
  Language IDs: (length=4)
     0409 English(US)

# mount /dev/sda1 /mnt/usbstick -t vfat
mount: /dev/sda1 is not a valid block device

This is running Linux-2.4.34.4


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