🚀 go-pugleaf

In article <1992Aug10.104110.21214@menudo.uh.edu> cosc16to@menudo.uh.edu (Andy Hakim) writes:
>Verify is off, and the problems have occured with ADVANCED compresion in
>TD.    The reason why I dont think it's my media is that it's teledisk that
>is giving me the CRC error while reading the .td0.  ie: it pops up a
>screen saying "CRC error while reading xxxx.td0" and stops the process.
>It does this while reading the .td0 -- it hasnt begun writing to
>the floppy yet. 
>
>Originally, I discovered this bug when someone sent me about 20 .td0s
>which were done using advanced compression.  About 6 had crc errors.
>I got hold of the originals, and just to satisfy my curiosity, I td0'd 
>the disks in question using advanced compression.  Sure enough the 
>crc errors existed in my newly created td0s.  Then I tried using 
>"normal compression" and there were no problems.  These were all 
>3.5" 1.44mb media DOS formatted.  I am pretty certain that the
>data on the disks was compressed to begin with.
>
>Therefore, the problem is repeatable, and cannot be related to the media.  
>
>If there's a CRC error in the .td0, teledisk just quits at that point.
>Fortunatly, Sydex provides the utility crcheck.exe.  This can, and should
>be run after a creation of a .td0...
>
>Despite all this, I still have great confidence in TD.  It has never 
>failed using normal compression.  It's shareware, easy to use, widely
>avail, still supported by the authors.  Cant beat that.
>
>I will try to get hold of those "troublesome" disks and retry, just to
>be verify.  I will also give Sydex a ring to see if they are aware of any 
>such reports.

Are you saying that you can create a file that DOS says is OK in overall
terms (it can be copied to another copy of itself, etc.), and that the
CRCheck program that comes with Teledisk will reject the file created
immediately afterwards if advanced compression is turned on?  Further, if
the same diskette is used to create a normal compression variant, then
Teledisk can create a descendent floppy with no problems?  So, you should
be able to send me one of these troublesome files in normal compressed
form, and possibly that passed through something else to make it shorter
such as .Z or a ZIP archive, etc.?  Then I should be able to reproduce
the problem on my own PC.

Perhaps the bug is associated with length?  These are the second longest
standard format PC disks, and there isn't much support for 2.88 Megs.  We
are concerned with RX50's only here for the most part.

We appreciate any input on this matter before we commit to a program that
looks so good for the desired purpose.

cjl