[/code]Все. Разобрался, вроде. В драйвере было одно место, где обрабатывался запрос на описание устройства
[code]case SCSI_INQUIRY:
            if(pCommandBlock[1] == 0)
            {
                if (datalen  == sizeof (adi_msd_InquiryReport))
                {
                    memcpy(pBuffer, &adi_msd_InquiryReport, datalen);
                    return (true);
                }
            }
            else // Added for Windows Vista
            if(pCommandBlock[1] == 1)
            {
                memcpy(pBuffer, &adi_msd_InquiryReport_1, 36);
                *pActualBytesToReturn = 36;
                return(true);
            }
            break;

case SCSI_INQUIRY:
            if(pCommandBlock[1] == 0)
            {
                size_t BytesToCopy;
                
                if (datalen >= SCSI_INQUIRY_REPORT_SIZE)
                {
                    BytesToCopy = SCSI_INQUIRY_REPORT_SIZE;
                }
                else
                {
                    BytesToCopy = datalen;
                }
                
                memcpy(pBuffer, &adi_msd_InquiryReport, BytesToCopy );
                
                *pActualBytesToReturn = BytesToCopy;
                    
                bResult = true;
                break;
            }
            else // Added for Windows Vista
            {
                if(pCommandBlock[1] == 1)
                {
                    memcpy(pBuffer, &adi_msd_InquiryReport_1, SCSI_INQUIRY_REPORT_SIZE );
                    *pActualBytesToReturn = SCSI_INQUIRY_REPORT_SIZE;
                
                    bResult = true;
                }
            }
            break;