Dear specalist and customers,

I need some help for the TDP 2.2 Product of our Exchange Servers.
We backed up our Information-Stores over a GB/Ethernet  tcp/ip connection
with very bad performance and long durations.
After some tunings we got an "unknown API-Error" Code 425.

But first some Hardwareinformations:
We use Compaq-Server with four 450 MHz prozzessors, 4 GB Ram, GB/Eth.-card,
Exhange 5.5 incl. SP4, Win NT 4.0 incl. SP 6a,
TSM B/A Client 4.2.1.16, TDP 2.2 and in the Backend a Comparex Tetragon
Disk-Subsystem.

To tune the performance we opened a problemrecord with IBM and changed some
parameters (Buffersize from 1024 to 8192 and Buffers from 3 to 8).
After this tunings we got the first time the "code 425" and we doesn 't got
out of this Problem yet by the way of uesing GB/Ethernet.
Does anyone have also bad Experiance with this Error ? 

IBM told us, that this problem is based on the Microsoft API-Interface.
There should be an HRBACKUPREAD-Problem with filling up the Buffers with
Datas as fast as it should be done.
The time is probably  too long  and than it becomes a timeout followed by
the unknown API-Error.
Is there someone who can help us?
May a lot of TDP users have the same, unexplained problem.
It would be nice to here of you soon.

kindley regards

Wolf-Christian Lücke

K-DOI-44
Volkswagen AG Wolfsburg
Storage Management
Windows Platform

Tel.:   05361/9-22124
E-Fax:  05361/9-57-22124

E-Mail: mailto:wolf-christian.luecke AT volkswagen DOT de