Hi,

I tried to get a sony cd writer working but w/o success.
I compiled scsi and usb support into the kernel (2.4.5).
If I try to mount scd0 I get the following message:

mount: /dev/scd0: unknown device

below is the relevant output of 'lsusb', 'dmesg' and
'cat /proc/scsi/usb-storage-0/0': The cd writer is
apparently recognized.

how do I find out on which scsi device the usb-storage
is attached ?

any help much appreciated.

-- 
   Johannes

# cat /proc/scsi/usb-storage-0/0
cat /proc/scsi/usb-storage-0/0
   Host scsi0: usb-storage
       Vendor: SONY
      Product: USB Mass STORAGE
Serial Number: None
     Protocol: 8020i
    Transport: Control/Bulk
         GUID: 054c00230000000000000000

# lsusb
[...]
Bus 001 Device 002: ID 054c:0023 Sony Corporation 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.00
  bDeviceClass            0 Interface
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x054c Sony Corporation
  idProduct          0x0023 
  bcdDevice            2.00
  iManufacturer           1 SONY
  iProduct                2 USB Mass STORAGE
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           39
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x40
      Self Powered
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      2 
      bInterfaceProtocol      1 
      iInterface              4 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               none
        wMaxPacketSize         64
        bInterval               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            3
          Transfer Type            Interrupt
          Synch Type               none
        wMaxPacketSize          2
        bInterval             100
  Language IDs: 0409

# dmesg
[...]
hub.c: USB new device connect on bus1/1, assigned device number 2
usb-storage: act_altsettting is 0
usb-storage: id_index calculated to be: 26
usb-storage: Array length appears to be: 44
usb-storage: USB Mass Storage device detected
usb-storage: Endpoints: In: 0xc7f5d160 Out: 0xc7f5d174 Int: 0xc7f5d188 (Period 100)
usb-storage: New GUID 054c00230000000000000000
usb-storage: Transport: Control/Bulk
usb-storage: Protocol: 8020i
usb-storage: *** thread sleeping.
scsi0 : SCSI emulation for USB Mass Storage devices
usb-storage: queuecommand() called
usb-storage: *** thread awakened.
usb-storage: Command INQUIRY (6 bytes)
usb-storage: 12 00 00 00 ff 00 23 c1 07 00 00 00
usb-storage: Call to usb_stor_control_msg() returned 12
usb-storage: usb_stor_transfer_partial(): xfer 255 bytes
usb-storage: usb_stor_bulk_msg() returned 0 xferred 96/255
usb-storage: CB data stage result is 0x1
usb-storage: -- CB transport device requiring auto-sense
usb-storage: Issuing auto-REQUEST_SENSE
usb-storage: Call to usb_stor_control_msg() returned 12
usb-storage: usb_stor_transfer_partial(): xfer 18 bytes
usb-storage: usb_stor_bulk_msg() returned 0 xferred 18/18
usb-storage: usb_stor_transfer_partial(): transfer complete
usb-storage: CB data stage result is 0x0
usb-storage: -- Result from auto-sense is 0
usb-storage: -- code: 0x70, key: 0x6, ASC: 0x29, ASCQ: 0x0
usb-storage: Unit Attention: (unknown ASC/ASCQ)
usb-storage: Fixing INQUIRY data to show SCSI rev 2
usb-storage: scsi cmd done, result=0x2
usb-storage: *** thread sleeping.
usb-storage: queuecommand() called
usb-storage: *** thread awakened.
usb-storage: Bad target number (1/0)
usb-storage: *** thread sleeping.
usb-storage: queuecommand() called
usb-storage: *** thread awakened.
usb-storage: Bad target number (2/0)
usb-storage: *** thread sleeping.
usb-storage: queuecommand() called
usb-storage: *** thread awakened.
usb-storage: Bad target number (3/0)
usb-storage: *** thread sleeping.
usb-storage: queuecommand() called
usb-storage: *** thread awakened.
usb-storage: Bad target number (4/0)
usb-storage: *** thread sleeping.
usb-storage: queuecommand() called
usb-storage: *** thread awakened.
usb-storage: Bad target number (5/0)
usb-storage: *** thread sleeping.
usb-storage: queuecommand() called
usb-storage: *** thread awakened.
usb-storage: Bad target number (6/0)
usb-storage: *** thread sleeping.
usb-storage: queuecommand() called
usb-storage: *** thread awakened.
usb-storage: Bad target number (7/0)
usb-storage: *** thread sleeping.
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 2
[...]

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