[求解]利用IOCTL_DISK_SET_DRIVE_LAYOUT_EX给磁盘分区

[fly4free]

先上一段代码， 该代码根据网上找到的修改了一下，注释（英文的）基本没删。
"\\\\.\\PhysicalDrive1" 是我的U盘的符号连接。。

DWORD func()
{
	HANDLE hDrive = INVALID_HANDLE_VALUE;
	BOOL Result; // used to read bad DeviceIoControl calls
	DWORD dwRetCode = 0;
	DWORD szReturned;   
	DWORD szNewLayout;
	unsigned int SectorSize = 512;   
	LARGE_INTEGER DiskSize;
	LARGE_INTEGER Part_1_size;
	LARGE_INTEGER Part_2_size;

	DRIVE_LAYOUT_INFORMATION_EX *dl = NULL;
	CREATE_DISK disk;

	DiskSize.QuadPart = 32768000;          //我的U盘的总容量，字节数
	Part_1_size.QuadPart = 32768000 / 2;
	Part_2_size.QuadPart = 32768000 / 2;

	int PartitionCount = 4;

	// Very important! Size correctly this structure. Even if there's only    
	// one primary partition, you MUST size the buffer to contain    
	// AT LEAST 4 PARTITION_INFORMATION_EX!   
	szNewLayout = sizeof(DRIVE_LAYOUT_INFORMATION_EX) + 
		(PartitionCount - 1) * sizeof(PARTITION_INFORMATION_EX);

	dl = (DRIVE_LAYOUT_INFORMATION_EX*) new BYTE[szNewLayout];

	// Open handle to physical device   
	// NtCreateFile() function can be used too with "\\device\\harddisk1\\partiton0" path.   
	hDrive = CreateFile(
		_T("\\\\.\\PhysicalDrive1"),
		GENERIC_READ|GENERIC_WRITE, 
		FILE_SHARE_READ|FILE_SHARE_WRITE,
		NULL, //default security attributes   
		OPEN_EXISTING, // disposition   
		0,// file attributes   
		NULL);

	if(!hDrive){   
		// handle the error   
		dwRetCode = GetLastError();
		goto SetDriveLayout_Cleanup;
	}
	
	ZeroMemory(&disk,sizeof(CREATE_DISK));   
	disk.PartitionStyle = PARTITION_STYLE_MBR;   
	disk.Mbr.Signature = 0xA4B57300;// the signature can be randomly generated   

	// Create primary partition MBR   
	Result = DeviceIoControl(hDrive,IOCTL_DISK_CREATE_DISK, 
		&disk,sizeof(CREATE_DISK), NULL,0, &szReturned,NULL);

	if(!Result){   
		dwRetCode = GetLastError();
		goto SetDriveLayout_Cleanup;
	}   
	Result = DeviceIoControl(hDrive,IOCTL_DISK_UPDATE_PROPERTIES, 
		NULL,0,NULL,0,&szReturned,NULL);

	// set RewritePartition=true in every partition to force rewrite.   
	for (int item = 0; item < PartitionCount; item++){
		dl->PartitionEntry[item].RewritePartition = 1;
		dl->PartitionEntry[item].PartitionNumber = 0;
	}
		
	//Setup drive layout   
	ZeroMemory(dl, szNewLayout);

	dl->PartitionEntry[0].PartitionStyle = PARTITION_STYLE_MBR;   
	dl->PartitionEntry[0].StartingOffset.QuadPart = 32256;   // 63扇区
	dl->PartitionEntry[0].PartitionLength = Part_1_size;   
	dl->PartitionEntry[0].PartitionNumber = 1;   
	dl->PartitionEntry[0].RewritePartition = TRUE;   
	dl->PartitionEntry[0].Mbr.PartitionType = 0x07;// PARTITION_IFS (NTFS partition or logical drive)   
	dl->PartitionEntry[0].Mbr.BootIndicator = TRUE;
	dl->PartitionEntry[0].Mbr.RecognizedPartition = 1;   
	dl->PartitionEntry[0].Mbr.HiddenSectors = 32256/SectorSize;   
	goto OPERATION_Continue;

	dl->PartitionEntry[1].PartitionStyle = PARTITION_STYLE_MBR;   
	dl->PartitionEntry[1].StartingOffset.QuadPart = Part_1_size.QuadPart + 32256i64;   
	dl->PartitionEntry[1].PartitionLength = Part_2_size;   
	dl->PartitionEntry[1].PartitionNumber = 0;   
	dl->PartitionEntry[1].RewritePartition = TRUE;   
	dl->PartitionEntry[1].Mbr.PartitionType = PARTITION_EXTENDED; //0x05
	dl->PartitionEntry[1].Mbr.BootIndicator = FALSE;
	dl->PartitionEntry[1].Mbr.RecognizedPartition = 1;   
	dl->PartitionEntry[1].Mbr.HiddenSectors = (32256i64 + Part_1_size.QuadPart)/SectorSize;
	  

OPERATION_Continue:
	// setup drive layout   
	dl->PartitionStyle = PARTITION_STYLE_MBR;   
	dl->PartitionCount = PartitionCount;// specify AT LEAST 4 partitions!!!   
	dl->Mbr.Signature = 0xA4B57300;   

	// Set layout   
	Result = DeviceIoControl(hDrive, 
		IOCTL_DISK_SET_DRIVE_LAYOUT_EX, 
		&dl, szNewLayout, 
		NULL, 0,
		&szReturned, NULL);

	if(!Result) {
		dwRetCode = GetLastError();
		goto SetDriveLayout_Cleanup;
	}

	// update disk properties   
	Result = DeviceIoControl(hDrive, 
		IOCTL_DISK_UPDATE_PROPERTIES, 
		NULL,0, NULL,0, &szReturned, NULL);   

SetDriveLayout_Cleanup:
	if (hDrive != INVALID_HANDLE_VALUE )
		CloseHandle(hDrive);
	if (dl != NULL)
		delete [] dl;

	return dwRetCode;
}

在后面调用 IOCTL_DISK_SET_DRIVE_LAYOUT_EX 的时候，失败，GetLastError信息为：
0x00000018 程序发出命令，但命令长度不正确。

修改了各种相关数值，貌似都这一个结果，怎么办？

[lp156321]

友情帮顶。

[fly4free]

我现在知道为什么 PartitionEntry 的个数是 实际分区的4倍了
因为 4是MBR或EBR中分区表 条目的个数，分区的总数就是 MBR 与 EBR 的总数

不过即使知道这个也无法获得本帖子的答案……


谁知道为什么？怎么解决？

恳请兔子大帮忙~~

[fly4free]

调试了N久，终于发现问题所在了。

    // Set layout   
    Result = DeviceIoControl(hDrive, 
        IOCTL_DISK_SET_DRIVE_LAYOUT_EX, 
        &dl, szNewLayout, 
        NULL, 0,
        &szReturned, NULL);

真是低级错误啊！

散分，周一结。

[wqlxp]

这个调用完后有没有格式化？

[lijing_1984]

我也遇到相同的问题，但我是菜鸟，不知道问题到底出在什么地方，请大侠们给予明示。

[cgwtzz]

调成功后能格式化U盘了吗？格式化后是什么文件系统格式？FAT?