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Hi,

My aim is to create partition to the full disk size for a raw usb disk. The code snippet is as follows:

// usbpartition.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "windows.h"


int _tmain(int argc, _TCHAR* argv[])
{
bool bResult = false; // generic results flag
HANDLE hDevice; // handle to the drive to be examined
DWORD junk = 0; // discard results

hDevice = CreateFile(TEXT("\\\\.\\PhysicalDrive1"), //"\\\\.\\PhysicalDrive1", // drive to open
GENERIC_READ | GENERIC_WRITE, // no access to the drive
FILE_SHARE_READ | // share mode
FILE_SHARE_WRITE,
NULL, // default security attributes
OPEN_EXISTING, // disposition
0, // file attributes
NULL); // do not copy file attributes
if (hDevice == INVALID_HANDLE_VALUE) // cannot open the drive
{
return GetLastError();
}

CREATE_DISK dsk;
dsk.PartitionStyle = PARTITION_STYLE_MBR;
dsk.Mbr.Signature = 9999;

// Initialize disk
bResult = DeviceIoControl(hDevice, // device to be queried
IOCTL_DISK_CREATE_DISK, // operation to perform
&dsk, sizeof(dsk), //sizeof(pdg), // output buffer
NULL, 0, // no output buffer
&junk, // # bytes returned
NULL);
if (!bResult)
{
return GetLastError();
}
bResult = DeviceIoControl(hDevice,
IOCTL_DISK_UPDATE_PROPERTIES,
NULL, 0, NULL, 0, &junk, NULL);
if (! bResult)
{
return GetLastError();
}

LARGE_INTEGER lgPartitionSize;
lgPartitionSize.QuadPart = (1024 * 1024 * 1024);
DWORD dwDriverLayoutInfoExLen = sizeof (DRIVE_LAYOUT_INFORMATION_EX) + 3 * sizeof(PARTITION_INFORMATION_EX);
DRIVE_LAYOUT_INFORMATION_EX *pdg = (DRIVE_LAYOUT_INFORMATION_EX *)new BYTE[dwDriverLayoutInfoExLen];
if (pdg == NULL)
{
return -1;
}
SecureZeroMemory(pdg, dwDriverLayoutInfoExLen);
// set RewritePartition=true in every partition to force rewrite.
// for (int item = 0; item < 4; item++){
// pdg->PartitionEntry[item].RewritePartition = 1;
// pdg->PartitionEntry[item].PartitionNumber = 0;
// }

pdg->PartitionStyle = PARTITION_STYLE_MBR;
pdg->PartitionCount = 1;
pdg->Mbr.Signature = 99999;

pdg->PartitionEntry[0].PartitionStyle = PARTITION_STYLE_MBR;
pdg->PartitionEntry[0].StartingOffset.QuadPart = 32256; // 63
pdg->PartitionEntry[0].PartitionLength.QuadPart = lgPartitionSize.QuadPart; // lgPartitionSize.QuadPart * 36;
pdg->PartitionEntry[0].PartitionNumber = 1;
pdg->PartitionEntry[0].RewritePartition = TRUE;
pdg->PartitionEntry[0].Mbr.PartitionType = PARTITION_FAT32; // PARTITION_IFS (NTFS partition or logical drive)
pdg->PartitionEntry[0].Mbr.BootIndicator = false;
pdg->PartitionEntry[0].Mbr.RecognizedPartition = 1;
pdg->PartitionEntry[0].Mbr.HiddenSectors = 0; // 32256 / 512;

// partition a disk
bResult = DeviceIoControl(hDevice, // device to be queried
IOCTL_DISK_SET_DRIVE_LAYOUT_EX, // operation to perform
pdg, sizeof DRIVE_LAYOUT_INFORMATION_EX, //sizeof(pdg), // output buffer
NULL, 0, // no output buffer
&junk, // # bytes returned
NULL);
if (!bResult)
{
return GetLastError();
}

bResult = DeviceIoControl(hDevice,
IOCTL_DISK_UPDATE_PROPERTIES,
NULL, 0, NULL, 0, &junk, NULL);
if (!bResult)
{
return GetLastError();
}

PARTITION_INFORMATION_EX dskinfo;
PARTITION_INFORMATION_MBR mbrinfo;
mbrinfo.PartitionType = PARTITION_FAT32; //PARTITION_NTFT;
mbrinfo.HiddenSectors = 0; //(32256 / 512);
mbrinfo.BootIndicator = 0; //1;
mbrinfo.RecognizedPartition = 1;

dskinfo.PartitionStyle = PARTITION_STYLE_MBR;
dskinfo.StartingOffset.QuadPart = 32256;
dskinfo.PartitionLength.QuadPart = lgPartitionSize.QuadPart; //lgPartitionSize.QuadPart * 36;
dskinfo.PartitionNumber = 1;
dskinfo.RewritePartition = TRUE;
dskinfo.Mbr = mbrinfo;
// IOCTL_DISK_SET_PARTITION_INFO_EX can not perform successful
bResult = DeviceIoControl(hDevice, // device to be queried
IOCTL_DISK_SET_PARTITION_INFO_EX, // operation to perform
&dskinfo, sizeof(dskinfo), //sizeof(pdg), // output buffer
NULL, 0, // no output buffer
&junk, // # bytes returned
//(LPOVERLAPPED)
NULL);
if (!bResult)
{
int out = GetLastError();
printf("output=%d\n",out);
// OutputDebugString(L"output",GetLastError());
return out;
}

return 0;
}

But the IOCTL IOCTL_DISK_SET_PARTITION_INFO_EX fails with error code 31. Please help me out whether my code is right..
Posted

1 solution

And the usb disk is also not partitioned..
 
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