Hi everybody! 
         I'm sitting here looking at my customers environment and wonder 
how TDP for Exchange 
         is sooooo slow via SAN. 
         We have a complete Win2000 environment with all the newest 
patches installed 
         (Server 4.2.1.12, StorageAgent 4.2.1.12, API 4.2.1.30, TDP Exch. 
2.2) 
         We share two drives of a 3584 library via SAN data gateway 
(newest firmware). 

         The backup via LAN (!) is nearly as fast as it could be (up to 12 
MB/s without compression). 

         But the backup via SAN ist very slow. 
         It starts slow (at 1200 KB/s) and slows down to 800 KB/s. 

         Does anyone have recommendations tuning the dsm.opt-file or 
tdpexc.cfg-file... 

         my dsm.opt-file: 
         tcpwindowsize 63 
         tcpbuffsize 32 
         txnb 25600 

         my tdpexc.cfg-file: 
         buffers 4 
         buffersize 2048 

         ... or any other ideas? 
         (Are there any rules-of-thumb how to tune this options?) 

         Thanx in advance, 
         Karsten Huettmann, c.a.r.u.s. IT AG, Germany
-----
Mit freundlichen Grüssen / with regards
Mit freundlichen Grüssen / with regards
Karsten Hüttmann
----------------------------------------------------------
Karsten Hüttmann
Karsten Hüttmann
c.a.r.u.s. Information Technology AG
Advanced System Center
Bornbarch 9, 22848 Norderstedt, Germany

E-Mail: karsten.huettmann AT carus DOT de
Firma: +49.40.51435.3231
Mobil: +49.171.7634388
Fax: +49.40.51435.1111