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

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

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