private static boolean isGoodBlockSize(int bs) {
		return bs > 0 && bs % 512 == 0;
	}
Apple HFS+ volume header.
<p>
See https://developer.apple.com/library/archive/technotes/tn/tn1150.html#VolumeHeader
<p>
Fields are BigEndian
Ghidra/Features/FileFormats/src/main/java/ghidra/file/formats/ios/hfs/HFSPlusVolumeHeader.java