GetVolumeInformation 获取磁盘卷标序列号 不同的电脑居然一样

[ohxmyxohx]

GetVolumeInformation 获取磁盘卷标序列号 不同的电脑会出现相同的情况!
请问在什么情况下会出现相同的序号?

[百事烟]

CSDN下载里有个现成的，可以用，

你那个是读卷标

[见习学术士]

磁盘卷标是唯一表示磁盘的。
磁盘序列号才是唯一标识电脑的。

一下代码获取磁盘序列号

BOOL CMachineId::WinNTHDSerialNumAsPhysicalRead( BYTE* dwSerial, size_t* puSerialLen, UINT uMaxSerialLen )
{
#define  DFP_GET_VERSION          0x00074080
	BOOL bInfoLoaded = FALSE;

	for( UINT uDrive = 0; uDrive < 4; ++ uDrive )
	{
		HANDLE hPhysicalDriveIOCTL = 0;

		//  Try to get a handle to PhysicalDrive IOCTL, report failure
		//  and exit if can't.
		char szDriveName [256];
		sprintf( szDriveName, "\\\\.\\PhysicalDrive%d", uDrive );

		//  Windows NT, Windows 2000, must have admin rights
		hPhysicalDriveIOCTL = CreateFile( szDriveName,
			GENERIC_READ | GENERIC_WRITE, 
			FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
			OPEN_EXISTING, 0, NULL);

		if( hPhysicalDriveIOCTL != INVALID_HANDLE_VALUE )
		{
			GETVERSIONOUTPARAMS VersionParams = { 0 };
			DWORD               cbBytesReturned = 0;

			// Get the version, etc of PhysicalDrive IOCTL
			if( DeviceIoControl( hPhysicalDriveIOCTL, DFP_GET_VERSION,
				NULL, 
				0,
				&VersionParams,
				sizeof( GETVERSIONOUTPARAMS ),
				&cbBytesReturned, NULL ) )
			{
				// If there is a IDE device at number "i" issue commands
				// to the device
				if( VersionParams.bIDEDeviceMap != 0 )
				{
					BYTE             bIDCmd = 0;   // IDE or ATAPI IDENTIFY cmd
					SENDCMDINPARAMS  scip = { 0 };

					// Now, get the ID sector for all IDE devices in the system.
					// If the device is ATAPI use the IDE_ATAPI_IDENTIFY command,
					// otherwise use the IDE_ATA_IDENTIFY command
					bIDCmd = ( VersionParams.bIDEDeviceMap >> uDrive & 0x10 ) ? IDE_ATAPI_IDENTIFY : IDE_ATA_IDENTIFY;
					BYTE IdOutCmd[sizeof( SENDCMDOUTPARAMS ) + IDENTIFY_BUFFER_SIZE - 1] = { 0 };

					if( DoIdentify( hPhysicalDriveIOCTL, 
						&scip, 
						( PSENDCMDOUTPARAMS )&IdOutCmd, 
						( BYTE )bIDCmd,
						( BYTE )uDrive,
						&cbBytesReturned ) )
					{
						if( * puSerialLen + 20U <= uMaxSerialLen )
						{
							CopyMemory( dwSerial + * puSerialLen, ( ( USHORT* )( ( ( PSENDCMDOUTPARAMS )IdOutCmd )->bBuffer ) ) + 10, 20 );  // 序列号

							// Cut off the trailing blanks
							UINT i = 20;
							for( ; i != 0U && ' ' == dwSerial[* puSerialLen + i - 1]; -- i )  {}
							* puSerialLen += i;

							CopyMemory( dwSerial + * puSerialLen, ( ( USHORT* )( ( ( PSENDCMDOUTPARAMS )IdOutCmd )->bBuffer ) ) + 27, 40 ); // 型号

							// Cut off the trailing blanks
							for( i = 40; i != 0U && ' ' == dwSerial[* puSerialLen + i - 1]; -- i )  {}
							* puSerialLen += i;

							bInfoLoaded = TRUE;
						}
						else
						{
							::CloseHandle( hPhysicalDriveIOCTL );
							return bInfoLoaded;
						}
					}
				}
			}
			CloseHandle( hPhysicalDriveIOCTL );
		}
	}
	return bInfoLoaded;
}

[向立天]

卷标当然有可能一样啊
不就是C、D、E、F什么的

[shiyunqiang]

应该读磁盘序列号，因为卷标格式化一下磁盘就变了。

[fandh]

卷标是软件生成的，如果系统都是ghost同一个版本，那么，系统盘符的卷标必然是一样的
如果不想一样，只能取得磁盘序列号；