The identical 4k size for both /Volumes folders seems to rule out the allocation block theory. [that 4k is probably the symlink to / which usually takes a single byte ("/"), therefore consuming a single allocation block.]
Hmm, but then what about the 1.0K for
/home and
/net? (FWIW, when I run the command, I get both of those, plus 512B for
/dev.)
If a single-byte file consumes a full allocation block, wouldn't a 512-byte or 1024-byte file likewise consume a full allocation block? Or am I not understanding what you're saying?