How to get drive information by volume id

问题

I have a txt file with volume id's in it.

I need to get drive info (drive letter, drive size, etc.) from the drive volume id (Windows):

the volume id is in the following format:

\\?\Volume{XXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}

The drive can be Removable/local disk

It doesn't matter how the info is retrieved (it could be script, cpp ,c#, java code).

EDIT:

I tried to use DriveInfo, Win32_LogicalDisk, Win32_Volume, Win32_PnpDevices - but I couldn't find this weird id... in all cases the id has a differrent format

UPDATE:

Found out how to do it.

you can enumerate Win32_Volume like this:

ManagementObjectSearcher ms = new ManagementObjectSearcher("Select * from Win32_Volume");    
foreach(ManagementObject mo in ms.Get())   
{
    var guid = mo["DeviceID"].ToString();

    if(guid == myGuid)
        return mo["DriveLetter"];
}

回答1:

Volume size, etcetera is easy. Just use the normal Win32 methods. Any function that accepts "C:" as a drive will also accept the volume GUID path (because that's what a \\?\Volume{XXX} is properly called).

The "drive letter" is a bit trickier as there may be 0, 1 or more drive letters. You need to call FindFirstVolumeMountPoint / FindNextVolumeMountPoint / FindVolumeMountPointClose to get all of them.

回答2:

Try use this

System.Management.ManagementObjectSearcher ms =
new System.Management.ManagementObjectSearcher("SELECT * FROM Win32_DiskDrive");
foreach (ManagementObject mo in ms.Get())
{
    //Find by ID
}

For details reed this Win32_DiskDrive class

回答3:

There is an API function for this: GetVolumePathNamesForVolumeName

It returns a null terminated array, to allow for multiple mount points. If you have only one mount point (typical), then you can read it as a regular null terminated string.

This is more efficient that enumerating disks/volumes, which could cause idle disks to spin up.

回答4:

You can use DriveInfo.GetDrives Method to get drive info. Here is the sample code from MSDN

DriveInfo[] allDrives = DriveInfo.GetDrives();

foreach (DriveInfo d in allDrives)
{
    Console.WriteLine("Drive {0}", d.Name);
    Console.WriteLine("  File type: {0}", d.DriveType);
    if (d.IsReady == true)
    {
        Console.WriteLine("  Volume label: {0}", d.VolumeLabel);
        Console.WriteLine("  File system: {0}", d.DriveFormat);
        Console.WriteLine(
            "  Available space to current user:{0, 15} bytes", 
            d.AvailableFreeSpace);

        Console.WriteLine(
            "  Total available space:          {0, 15} bytes",
            d.TotalFreeSpace);

        Console.WriteLine(
            "  Total size of drive:            {0, 15} bytes ",
            d.TotalSize);
    }
}

来源：https://stackoverflow.com/questions/10186277/how-to-get-drive-information-by-volume-id

标签

c++

drive

driveinfo