src/java.base/windows/classes/sun/nio/fs/WindowsFileStore.java

*** 123,154 ****
      public boolean isReadOnly() {
          return ((volInfo.flags() & FILE_READ_ONLY_VOLUME) != 0);
      }
  
      // read the free space info
!     private DiskFreeSpace readDiskFreeSpace() throws IOException {
          try {
              return GetDiskFreeSpaceEx(root);
          } catch (WindowsException x) {
              x.rethrowAsIOException(root);
              return null;
          }
      }
  
      @Override
      public long getTotalSpace() throws IOException {
!         return readDiskFreeSpace().totalNumberOfBytes();
      }
  
      @Override
      public long getUsableSpace() throws IOException {
!         return readDiskFreeSpace().freeBytesAvailable();
      }
  
      @Override
      public long getUnallocatedSpace() throws IOException {
!         return readDiskFreeSpace().freeBytesAvailable();
      }
  
      @Override
      public <V extends FileStoreAttributeView> V getFileStoreAttributeView(Class<V> type) {
          if (type == null)
--- 123,168 ----
      public boolean isReadOnly() {
          return ((volInfo.flags() & FILE_READ_ONLY_VOLUME) != 0);
      }
  
      // read the free space info
!     private DiskFreeSpace readDiskFreeSpaceEx() throws IOException {
          try {
              return GetDiskFreeSpaceEx(root);
          } catch (WindowsException x) {
              x.rethrowAsIOException(root);
              return null;
          }
      }
  
+     private DiskFreeSpace readDiskFreeSpace() throws IOException {
+         try {
+             return GetDiskFreeSpace(root);
+         } catch (WindowsException x) {
+             x.rethrowAsIOException(root);
+             return null;
+         }
+     }
+ 
      @Override
      public long getTotalSpace() throws IOException {
!         return readDiskFreeSpaceEx().totalNumberOfBytes();
      }
  
      @Override
      public long getUsableSpace() throws IOException {
!         return readDiskFreeSpaceEx().freeBytesAvailable();
!     }
! 
!     @Override
!     public int getBlockSize() throws IOException {
!         return (int)readDiskFreeSpace().bytesPerSector();
      }
  
      @Override
      public long getUnallocatedSpace() throws IOException {
!         return readDiskFreeSpaceEx().freeBytesAvailable();
      }
  
      @Override
      public <V extends FileStoreAttributeView> V getFileStoreAttributeView(Class<V> type) {
          if (type == null)
*** 163,172 ****
--- 177,188 ----
              return getTotalSpace();
          if (attribute.equals("usableSpace"))
              return getUsableSpace();
          if (attribute.equals("unallocatedSpace"))
              return getUnallocatedSpace();
+         if (attribute.equals("bytesPerSector"))
+             return getBlockSize();
          // windows specific for testing purposes
          if (attribute.equals("volume:vsn"))
              return volInfo.volumeSerialNumber();
          if (attribute.equals("volume:isRemovable"))
              return volType == DRIVE_REMOVABLE;