[HELP]: Star+gzip file corruption?

Hi....

I am trying to use star to create a compressed multivolume archive of a 
large amount of data on a remote server, and then download it to another 
machine and extract.

However,  I have been experiencing file corruption problems. The commands I 
am using are at the end of this email.

Before I started using star, I just created a single volume archive using 
tar czf. This has always worked (has been in use for 2+ years) and the only 
difference between the commands below and the original commands is that I 
used tar instead of star (and of course the star specific options).

The problem manifests itself in one of the volumes of the multi volume 
archive during decompression when I am downloading....I have discovered that 
if I manually try to gunzip the specific multi volume file which gives the 
problem I get the following message:

gunzip: dos82.tar.gz: invalid compressed data--format violated

This corruption can only have happened during upload (but I only find out 
about it during download). Also, it is random and doesn't always 
happen.....most of the time everything works fine.....so far it has happened 
approx 4 times in the last 10-15 attempts. I am just starting to try to 
debug the upload sequence to see if I can catch any errors during upload, 
but if I can't fix this, I will have to abandon star and go back to using 
single volume archives with tar.

In the meantime, I was wondering if anyone more knowledgeable than I could 
save me a little time and suggest what might be wrong, or what I could do to 
prevent this from happening?

Thanx muchly in advance.

Chris Bradshaw.


Upload
----------

#Make named pipe
mkfifo /tmp/archive.tar.gz

# Read data from pipe into ncftpput
ncftpput -u <user> -p <password> <Remote_Server> <Remove_Path> 
/tmp/archive.tar.gz &

# Feed data into pipe from star
/opt/schily/bin/star -cMvz H=gnutar tsize=100M \
f=/tmp/${ARCHIVE} new-volume-script=/tmp/rename.sh \
/tmp/archive.tar.gz

Download
--------------

# Download with wget and pipe to star to extract.
wget --output-document=- <Remote_URL>|/opt/schily/bin/star xzmf - -no-fsync 
-nochown blocks=2000 fs=10

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