Hallo,

turn for a while TSM compression on (in contrast to HW-tape
compression you are probably using now).
This will not change things, but it gives you statistics
how your data are beeing compressed during backup.
Your HW compression does simillar thing with simillar results.

Probably you have files on netware which can be compressed 
very well, maybe modestly used database files.

If your boss does not believe TSM´s statistics
take WinZip or something like that and compress 1 GB of typicall 
data both on Netware and on Windows and compare the resulting file size.


Turn the argumentation to the fact your users on Netware server
use tons of redundant data, most likely consisting to 
two thirds of spaces only :-)

:-)) juraj



-----Ursprüngliche Nachricht-----
Von: anton walde [mailto:nummer5lebt AT GMX DOT DE]
Gesendet: Mittwoch, 03. März 2004 16:00
An: ADSM-L AT VM.MARIST DOT EDU
Betreff: Great difference in Tape usage between Netware and Windows!?


Hello.

I have a question concerning tape usage:

we have two sites, one using Windows and one using Netware. we make the same
at both sites, incremental forever, no special taks like archive or
aomething like that.

Now we see the following:

while the Netware-site is using the LTO1-Tapes with 180-300 GB per tape, the
windows-site is using the same tapes with 120-140 GB par tape.

>From where does this great difference come from? Is compression a part of
the problem? or is it a problem of what tsm tells and what really is?

Please help me, my bos is going to kill me, because we need tapes and tapes
for 'no data' while for the big amounts we need none!!!

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