如何访问GPT格式的磁盘分区/GUID卷的文件系统信息? [英] How do I access the filesystem information for a GPT formatted disk partition/GUID volume?

问题描述

我能够获取标准MBR磁盘上分区的文件系统.但是，我遇到了麻烦，试图在GPT样式的分区方案上获取文件系统.到目前为止，我可以获得体积信息(从一个小的C ++ CLI测试应用程序-用VS2010编译):

I am able to obtain the filesystem for partitions on standard MBR disks. However I am hitting a brick wall trying to obtain the filesystem on a GPT-style partitioning scheme. To-date I can obtain the volume information (from a little C++ CLI test app - compiled with VS2010):

[1] GPT entry:
        partition number (2)
        partition name: Basic data partition
        partition Type GUID: {EBD0A0A2-B9E5-4433-87C0-68B6B72699C7}
        partition GUID ID: {AF359AFD-C400-419A-A0DF-6E0E084A548E}

ERROR: Cannot access volume '\\?\Volume{AF359AFD-C400-419A-A0DF-6E0E084A548E}' filesystem information. Have you specified a valid volume GUID? [DeviceIoControl() error: 1]

上面的分区是2Tb硬盘上的标准2Tb NTFS分区(条目1显然是系统保留的GPT表).我可以正确获取卷的句柄(使用CreateFile()函数).但是，当我调用DeviceIoControl(hVolume, FSCTL_QUERY_FILE_SYSTEM_RECOGNITION, ...)函数时，它将返回一个invalid function error ??

FSCTL_QUERY_FILE_SYSTEM_RECOGNITION调用对GPT格式化的硬盘有效吗?如果没有，如何获取给定GUID卷代码的文件系统信息?

谢谢
Bob

The above partition is standard 2Tb NTFS partition on a 2Tb harddisk (entry 1 is obviously the system reserved GPT table). I can obtain a handle to the Volume correctly (using the CreateFile() function). However when I call the DeviceIoControl(hVolume, FSCTL_QUERY_FILE_SYSTEM_RECOGNITION, ...) function it returns an invalid function error??

Does the FSCTL_QUERY_FILE_SYSTEM_RECOGNITION call work for GPT formatted harddisks? If not how do I obtain the filesystem information for a given GUID volume code?

Thanks
Bob

推荐答案

确定
我自己解决了这个问题.希望该解决方案将对其他人有所帮助.
答案是使用函数:GetVolumeInformation().

您必须传递L"\\?\ Volume {AF359AFD-C400-419A-A0DF-6E0E084A548E} \"(示例GUID卷描述符)作为第一个参数.注意拖尾(\)...啊，很棒的Microsoft-再次与它们的API保持一致！

GetVolumeInformation()的返回参数:
lpFileSystemNameBuffer [out]
将在您的GPT/MBR分区上包含真实的文件系统！

鲍勃

OK
I solved this problem myself. Hopefully the solution will help other folks. The
answer is to use the function: GetVolumeInformation().

You must pass L"\\?\Volume{AF359AFD-C400-419A-A0DF-6E0E084A548E}\" (an example GUID volume descriptor) as the first argument. NOTE THE TRAILING SLASH (\)... Ah wonderful Microsoft - being consistent with their APIs again!

The return parameters from the GetVolumeInformation():
lpFileSystemNameBuffer [out]
will contain the real world filesystem on your GPT/MBR partition!

Bob

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