Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!ubc-cs!van-bc!ve7apu!spraggs
From: spraggs@ve7apu.uucp (John Spraggs - VE7ADE)
Newsgroups: comp.sys.mac
Subject: Re: Re^2: Hard drive woes
Message-ID: <1989Jul27.080655.7360@ve7apu.uucp>
Date: 27 Jul 89 08:06:55 GMT
References: <8367@batcomputer.tn.cornell.edu> <8400137@m.cs.uiuc.edu> <10401@claris.com>
Reply-To: spraggs@ve7apu.UUCP (PUT YOUR NAME HERE)
Organization: VADCG, Richmond, B.C.
Lines: 30

In article <10401@claris.com> drc@claris.com (Dennis Cohen) writes:
>gillies@m.cs.uiuc.edu writes:
>>I thought the only limit imposed by the finder is on the number of
>>icons.  Is this limit 2200?  What happens when you run out of icons?
>>What happens when you run out of files?
>
>The limitation isn't imposed by the Finder, but rather by the Resource
>Manager and it isn't (exactly) on the number of icons.  It has to do with the
>number of distinct resources that may exist in a single file and it is
>2727 (cf Tech Note 141).  This limit affects the Finder and icons as follows.
>Each application/file which has its bundle bit set gets resource entries in
> [description]

TN 141 describes the calculation of the 2727 limit.  A 2 byte signed integer 
holds this offset.  With a max value of 32768 less 38 bytes of overhead
divided by 12 reserved entries each, gives 2727.5.  The tech note says that 
Inside Mac 1 describes the location of the integer as being at the end of a map,
but I don't have access to IM.

As soon as I started as our club's PD librarian, I loaded up all 30 floppies
on the new 80 Meg hard drive and hit dear old Max Headroom.  Neither CMS, the
dealer or Apple techlink could come up with an answer 2 years ago.  The
work around has been to use Hard Disk Partition.  I anxiously await 7.0.

What I would like to know is how to determine the value so I can tell how
close I might be to the edge.  I tried using resedit but didn't get anywhere.

Can anyone tell me where to look on a 1 Meg tan Plus with 6.0.3?

John