Path: utzoo!mnetor!uunet!husc6!bloom-beacon!think!ames!pasteur!ucbvax!decvax!decwrl!labrea!rocky!rokicki
From: rokicki@rocky.STANFORD.EDU (Tomas Rokicki)
Newsgroups: comp.sys.amiga
Subject: Re: Is AmigaDOS sane?
Message-ID: <976@rocky.STANFORD.EDU>
Date: 20 Jan 88 15:30:40 GMT
References: <30217R38@PSUVM> <2457@swan.ulowell.edu>
Reply-To: rokicki@rocky.UUCP (Tomas Rokicki)
Organization: Stanford University Computer Science Department
Lines: 35

> If your file is bigger than 70272 bytes, you'll need one additional
> block to hold some more information for the next 70272 bytes, and
> so on.

Actually, this occurs every 35,136 bytes, I believe.  The total
blocks taken by a file of $n$ bytes is

	2 + floor((n-1)/488) + floor((n-1)/35136)

I usually don't subtract the 1, I usually use the formula

	2 + floor(n/488) + floor(n/35136)

when seeing if there is space on a floppy for a file, to take into
account possible off-by-1 errors.  (Note that the floor function
is the same as integer division in C with positive numbers.)  So
the biggest file you can put on a floppy (figure it out!) is

	845,703 bytes

but you can only put

	439 1024 byte files

or

	879 1 byte files

or

	146 5120 byte files

on a floppy diskette.

Have fun!