Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uflorida!gatech!mcnc!rti!sunpix!matthew
From: matthew@sunpix.UUCP ( Sun Visualization Products)
Newsgroups: comp.sys.apple
Subject: Re: Problems with large files & large sub-directories
Message-ID: <607@greens.UUCP>
Date: 4 May 89 17:39:39 GMT
References: <8904301302.aa27400@SMOKE.BRL.MIL> <605@greens.UUCP> <1055@n8emr.UUCP>
Organization: Sun Microsystems, Research Triangle Park, NC
Lines: 79

In article <1055@n8emr.UUCP>, lwv@n8emr.UUCP (Larry W. Virden) writes:
| 
| Close - but if I am not mistaken, the 'root' directory has a limit of
| 50 directory entries in it.  Anyone know if there is perhaps a maximum

The correct count is 53 for a 'root' directory (((13 entries per block) * 
(4 blocks)) - (1 entry for the volume name))

| number of files which can appear in the directory bitmap (or whatever that
| map of names to blocks is called)?

There is only one volume bitmap for the entire 'volume (disk)'.  It will be
as large as necessary so that there is atleast 1 bit for every block on the 
volume.  Under ProDOS8 there is a maximum volume size of 32 meg (2^16 blocks),
and a maximum file size of 16 Meg (2^24 bytes).  The number of blocks required
to hold the volume bitmap is ((number_of_blocks_in_volume / 8) / 512).

| P.S.  I have enountered a few .bny/.bqy files which have intermingled
| files and directories.  For instance,
| 
| file1
| file2
| file3
| directory/
| directory/file4
| direcotry/file5
| file6
| file7
  directory2/
| directory2/file8
| directory2/file9
| file10
| 
| But when I try to create these with blu 2.27, I dont seem to be able to.
| Anyone have any ideas?  I dont really want to redownload one of the ecp8
| bny's from pro-carolina just to get a problem file... sigh. 

You missed an entry for 'directory2'.  The directories are in the list,
because the Binary II unpacking software (in your case: blu 2.27) needs to
know the names of the directories it needs to create as it unpacks the file.

I use BLU v2.28 (which only a minor bug fix above v2.27), and the way to 
create these types of Binary II files is simple.  In your example, just go 
to the directory that holds files:

file1
file2
file3
directory/
file6
file7
directory2/
file10

Mark all these files for packing (even the directories). BLU will then show you
the files in 'directory/'. Mark 'file4' and 'file5' for packing. It will then
show you 'directory2/'.  Mark 'file8' and 'file9' for packing.  Now start the
packing process, and BLU will take care of the rest.


| The reason that I need it is that I have had problems in the past with
| shrinkit 2.01 (and earlier) extracting these types of .bny files.  But
| till I can create one, I wont be able to send Andy a sample.

If your talking about the 'stops process after ~20 files' bug, he already
knows about it.  

| -- 
| Larry W. Virden	 674 Falls Place, Reynoldsburg, OH 43068 (614) 864-8817
| 75046,606 (CIS) ; LVirden (ALPE) ; osu-cis!n8emr!lwv (UUCP) 
| osu-cis!n8emr!lwv@TUT.CIS.OHIO-STATE.EDU (INTERNET)
| The world's not inherited from our parents, but borrowed from our children.


-- 
Matthew Lee Stier                         |
Sun Microsystems ---  RTP, NC  27709-3447 |        "Wisconsin   Escapee"
uucp: { sun, mcnc!rti }!sunpix!matthew    |
phone: (919) 469-8300 fax: (919) 460-8355 |