Le lundi 17 avril 2006 à 22:24 +0800, Frédéric Grosshans a écrit :
> I've a problem with a recently bought usb disk:there is a /dev/sda node
> but no /dev/sda1 . When I try to access /dev/sda, I've the following
> errors : [...]

Thanks for everyone who has helped. To have more information, I
configured CONFIG_USB_STORAGE_DEBUG . I have then the following output
in dmesg every 2 second when the disk is plugged. I don't like the line
I marked with >>>>

        usb-storage: queuecommand called
        usb-storage: *** thread awakened.
        usb-storage: Command TEST_UNIT_READY (6 bytes)
        usb-storage:  00 00 00 00 00 00
        usb-storage: Bulk Command S 0x43425355 T 0x136 L 0 F 0 Trg 0 LUN
        0 CL 6
        usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes
        usb-storage: Status code 0; transferred 31/31
        usb-storage: -- transfer complete
        usb-storage: Bulk command transfer result=0
        usb-storage: Attempting to get CSW...
        usb-storage: usb_stor_bulk_transfer_buf: xfer 13 bytes
        usb-storage: Status code 0; transferred 13/13
        usb-storage: -- transfer complete
        usb-storage: Bulk status result = 0
        usb-storage: Bulk Status S 0x53425355 T 0x136 R 0 Stat 0x1
>>>>usb-storage: -- transport indicates command failure 
        usb-storage: Issuing auto-REQUEST_SENSE
        usb-storage: Bulk Command S 0x43425355 T 0x137 L 18 F 128 Trg 0
        LUN 0 CL 6
        usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes
        usb-storage: Status code 0; transferred 31/31
        usb-storage: -- transfer complete
        usb-storage: Bulk command transfer result=0
        usb-storage: usb_stor_bulk_transfer_buf: xfer 18 bytes
        usb-storage: Status code 0; transferred 18/18
        usb-storage: -- transfer complete
        usb-storage: Bulk data transfer result 0x0
        usb-storage: Attempting to get CSW...
        usb-storage: usb_stor_bulk_transfer_buf: xfer 13 bytese
        following 
        usb-storage: Status code 0; transferred 13/13
        usb-storage: -- transfer complete
        usb-storage: Bulk status result = 0
        usb-storage: Bulk Status S 0x53425355 T 0x137 R 0 Stat 0x0
        usb-storage: -- Result from auto-sense is 0
        usb-storage: -- code: 0x70, key: 0x2, ASC: 0x3a, ASCQ: 0x0
        usb-storage: (Unknown Key): (unknown ASC/ASCQ)
        usb-storage: scsi cmd done, result=0x2
        usb-storage: *** thread sleeping.
        
And, the following when I unplug it 

        usb 2-2: USB disconnect, address 5
        usb-storage: storage_disconnect() called
        usb-storage: usb_stor_stop_transport called
        usb-storage: -- usb_stor_release_resources
        usb-storage: -- sending exit command to thread
        usb-storage: -- dissociate_dev
        usb-storage: *** thread awakened.
        usb-storage: -- exiting
        
I hope this can help
        
        

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