There are caveats, of course:

• NTFS supports transparent compression of files. There is the "actual" file size, and the "compressed" size. Which does -s return?
• NTFS supports sparse files. If a large section of a file contains NULL, the filesystem can save space by not allocating room for the NULL data. Here, I would assume -s would return the full size, not the "on disk" size.
• NTFS supports "alternate streams". A file can have many alternate streams, taking up data that I assume would never be reported by -s.
• Depending on the file size & cluster size, most files probably take up more space "on disk" than the contents of the file would suggest. Which does -s report here?

This is probably not an exhaustive list, I'm sure I'm forggeting something.

Edited by Chady -- closed ul tag.

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.