OK, thanx all for replies, I downloaded IOMeter. But: What testing parameter to you recommend (Read/Write/Random/Sequentiell/Workers/outstanding IOs/Blocksize ...)??

I played around with e.g. 32K 100% seq. read and up to 256 outstanding IOs to saturate the GB-LAN and I received about 100-110 MB/s on 1 GB-Link, up to 230 MB on 2 MPIO-Links (Round-Robin). But I don't know to compare these results with other DSS installations ... (good/bad performance, bottlenecks, ...)?

Can anyone publish his testing profil (IOMeter config file)?

Lukas