Path: utzoo!attcan!uunet!mcvax!steven
From: steven@cwi.nl (Steven Pemberton)
Newsgroups: comp.sys.atari.st
Subject: Re: How accurate is that show info. thing?
Message-ID: <7664@boring.cwi.nl>
Date: 11 Oct 88 10:37:31 GMT
References: <881004014748.973404@PCO-MULTICS.HBI.HONEYWELL.COM> <1545@nunki.usc.edu> <1183@atari.UUCP>
Sender: news@cwi.nl
Organization: CWI, Amsterdam
Lines: 18

In article <1183@atari.UUCP> apratt@atari.UUCP (Allan Pratt) writes:
> Show Info on the desktop adds up the number of data bytes used in each
> file; that's the "bytes used" field.  Then it uses the OS Dfree call to
> determine bytes available.  You will notice that the bytes available is
> always an even multiple of 1K.  The difference between (bytes used +
> bytes available) and (bytes available on an empty disk) is the internal
> fragmentation plus subdirectory space.  (Root directory and FAT space
> is not counted in the "bytes available" field for an empty disk).

By the way, there's a bug in Turbodos that returns the wrong number of
bytes free: it seems always to overestimate the free space. I only
noticed this after checking there was enough space on a diskette, and
then trying to copy to it, and getting a disk full error. Try writing
a small file to an empty disk with Turbodos loaded and do a show info
- it told me the right number of bytes used, but said that there were
the same number of bytes free as before I wrote the file.

Steven Pemberton, CWI, Amsterdam; steven@cwi.nl