0 Replies Latest reply on Jun 15, 2012 11:06 PM by Pradeep Pathak

    Sending IDENTIFY DEVICE COMMAND - ATA PASS THROUGH on raid - SSD

    Pradeep Pathak

      Hi All, (Kindly guide me if I am at wrong place)

      My aim is to detect Solid State Drives in systems with raid configuration. Using smartmontools' following command I observe bit 434 (217) shows value 1 for SSD: smartctl -i -r ataioctl,2 /dev/csmi0,0

      Attempting to read the same 512 bytes of data I have attempted to send IDENTIFY DEVICE commands in following 2 ways:

      Method 1 has info->IoctlHeader.ReturnCode = 3 which means CSMI_SAS_STATUS_INVALID_PARAMETER.(CSMI buffer provided is too small)

      Method 2 fails with DeviceIoControl() set GetLastError() as 87 (ERROR_INVALID_PARAMETER), Can you help me in understanding what could be wrong and am I on the right track?

       

      BYTE    portNumber = 0;

      _stprintf_s(DeviceName, (sizeof(char)*128),_T("\\\\.\\Scsi%u:"),portNumber);   

      handle = CreateFile(DeviceName, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE,  NULL,

                              OPEN_EXISTING, NULL, NULL);

      if (handle == INVALID_HANDLE_VALUE)

      {

           printf("Unable to open handle to device , Error %u\n", GetLastError()); 

           return;

      }   

      CSMI_SAS_STP_PASSTHRU_BUFFER* info = (CSMI_SAS_STP_PASSTHRU_BUFFER *)

      calloc(1, sizeof(CSMI_SAS_STP_PASSTHRU_BUFFER));

      info->IoctlHeader.HeaderLength = sizeof(IOCTL_HEADER);

      info->IoctlHeader.Timeout = CSMI_SAS_TIMEOUT;

      info->IoctlHeader.ControlCode = CC_CSMI_SAS_STP_PASSTHRU;

      info->IoctlHeader.Length = sizeof(CSMI_SAS_STP_PASSTHRU_BUFFER) -    sizeof(IOCTL_HEADER);

      info->IoctlHeader.ReturnCode = 0;

      memcpy(&info->IoctlHeader.Signature, CSMI_SAS_SIGNATURE, sizeof(CSMI_SAS_SIGNATURE));

       

      bSuccess = DeviceIoControl(handle, IOCTL_SCSI_MINIPORT, info,

                                    sizeof(CSMI_SAS_STP_PASSTHRU_BUFFER),

                                      info, sizeof(CSMI_SAS_STP_PASSTHRU_BUFFER),

                                      &bytesReturned, NULL);

       

       

       

      ////////////////////////////////////////////////////////

      METHOD 2

      /////////////////////////////////////////////////////////

        handle = CreateFile(L"\\\\.\\PhysicalDrive0", GENERIC_READ | GENERIC_WRITE,  FILE_SHARE_READ | FILE_SHARE_WRITE,

        NULL,

        OPEN_EXISTING,

        NULL,

        NULL);

        if (handle == INVALID_HANDLE_VALUE)

        {

        printf("Unable to open handle to device , Error %u\n", GetLastError());

        return 1;

        }

       

        //Allocate memory for ATA_PASS_THROUGH_EX and clear the contents

        pATAData = (PATA_PASS_THROUGH_EX) VirtualAlloc(NULL, dataSize, MEM_COMMIT, PAGE_READWRITE);

        ZeroMemory(pATAData,dataSize);

        //Fill in the IDENTIFY DEVICE query data

        pATAData->Length = sizeof(ATA_PASS_THROUGH_EX);

        pATAData->DataBufferOffset = sizeof(ATA_PASS_THROUGH_EX);

        pATAData->DataTransferLength = 512;

        pATAData->AtaFlags = ATA_FLAGS_DATA_IN;

        pATAData->TimeOutValue = 10; //Seconds

        pATAData->CurrentTaskFile[6] = 0xEC; /* send the command*/

       

        status = DeviceIoControl( handle,

      IOCTL_ATA_PASS_THROUGH,

        pATAData,

        dataSize, /* input buffer and size */

        pATAData,

        dataSize, /* output buffer and size */

        &bytescopied, /* bytes copied to output buffer*/

        NULL ); /* no overlapping */

       

      Thank you,

      Pradeep