private static bool GetExtentInfo(string volumeNameWithoutSlash, out int diskNumber, out long startingOffset, out long extentLength)
{
var volumeHandle = NativeMethods.CreateFile(volumeNameWithoutSlash, 0, NativeMethods.FILE_SHARE_READ | NativeMethods.FILE_SHARE_WRITE, IntPtr.Zero, NativeMethods.OPEN_EXISTING, 0, IntPtr.Zero);
if (volumeHandle.IsInvalid == false)
{
var de = new NativeMethods.VOLUME_DISK_EXTENTS();
de.NumberOfDiskExtents = 1;
int bytesReturned = 0;
if (NativeMethods.DeviceIoControl(volumeHandle, NativeMethods.IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS, IntPtr.Zero, 0, ref de, Marshal.SizeOf(de), ref bytesReturned, IntPtr.Zero))
{
if (bytesReturned > 0)
{
diskNumber = de.Extents.DiskNumber;
startingOffset = de.Extents.StartingOffset;
extentLength = de.Extents.ExtentLength;
return(true);
}
}
}
diskNumber = 0;
startingOffset = 0;
extentLength = 0;
return(false);
}
private static bool GetExtentInfo(string volumeNameWithoutSlash, out int diskNumber, out long startingOffset, out long extentLength)
{
var volumeHandle = NativeMethods.CreateFile(volumeNameWithoutSlash, 0, NativeMethods.FILE_SHARE_READ | NativeMethods.FILE_SHARE_WRITE, IntPtr.Zero, NativeMethods.OPEN_EXISTING, 0, IntPtr.Zero);
if (volumeHandle.IsInvalid == false) {
var de = new NativeMethods.VOLUME_DISK_EXTENTS();
de.NumberOfDiskExtents = 1;
int bytesReturned = 0;
if (NativeMethods.DeviceIoControl(volumeHandle, NativeMethods.IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS, IntPtr.Zero, 0, ref de, Marshal.SizeOf(de), ref bytesReturned, IntPtr.Zero)) {
if (bytesReturned > 0) {
diskNumber = de.Extents.DiskNumber;
startingOffset = de.Extents.StartingOffset;
extentLength = de.Extents.ExtentLength;
return true;
}
}
}
diskNumber = 0;
startingOffset = 0;
extentLength = 0;
return false;
}
