DeviceIoControl发送IOCTL_SCSI_PASS_THROUGH出现121异常

DeviceIoControl发送IOCTL_SCSI_PASS_THROUGH出现121错误
我使用DeviceIoControl先USB 设备发送IOCTL_SCSI_PASS_THROUGH指令，结果出现121错误，121错误在说明是信号灯超时，问问大家如何解决？

C/C++ code

    BOOL status = DeviceIoControl(hMassDevice,         IOCTL_SCSI_PASS_THROUGH,             (LPVOID)&m_sptwb,         (DWORD)inbuffersize,         (LPVOID)&m_sptwb,         (DWORD)length,         (LPDWORD)&returned,         NULL);

[解决办法]
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http://dev.csdn.net/develop/article/17/17209.shtm
[解决办法]
http://dev.csdn.net/develop/article/17/17209.shtm

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