Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!snorkelwacker!mit-eddie!uw-beaver!zephyr.ens.tek.com!orca.wv.tek.com!pogo!bluneski
From: bluneski@pogo.WV.TEK.COM (Bob Luneski)
Newsgroups: comp.sys.atari.st
Subject: Re: Directory Limits??!!
Message-ID: <8609@pogo.WV.TEK.COM>
Date: 26 Feb 90 00:22:55 GMT
Reply-To: bluneski@pogo.WV.TEK.COM (Bob Luneski)
Organization: Tektronix, Inc., Wilsonville,  OR.
Lines: 28


In <276.25E65B7C@uscacm.UUCP> Ron Hollins writes:

> Question:  Is there a limit to the total number of files that a 
>double-sided floppy disk can contain.

The root directory of a standard floppy disk is limited to 112 entries.
(7 sectors * 512 bytes/sector) / 32 bytes per entry = 112
Subfolders are limited only by disk space.

>I suspect that the 'FAT' must have a ceiling to it. 

Not one that you can violate. The standard 5 sector 12bit FAT table has
space for over 1700 data cluster entries whereas a 80 track 9 sector/track
double sided disk has only 709 data clusters.

>might you also suggest a technique to trap for this disk 'error'.

You should receive a -36L DOS error code = Access denied if you attempt
to create a file in this situation.

____________________________________________________________________________
  Bob Luneski                                                             
  Diamond Back Support Hotline:  bluneski@pogo.WV.TEK.COM                
                                 Genie: B.LUNESKI1                       
                                                                         
  The opinions expressed herein are my own and in no way reflect the     
  opinions of Tektronix, Inc.