Question : Problem: Slow HP ML370G5 windows 2003 R2 64bit

HI, I have a Small business server 2003. Ran out of space so installed a new HP ML370G5.
got 3 14GB drives in a raid 5 with 4GB of ram.
Installed server 2003 64Bit R2 on it.
Server responds slowly. Have updated all the drivers and moved a data share to it and it just seems to hang,
even when on the server itself, you click on something and it seems to wait then catch up.
 The files were ok on the SBS server just running out of space.
This was supposed to make it better but some days it is unusable and the mapped drive disconnects and says it is not there.

Answer : Problem: Slow HP ML370G5 windows 2003 R2 64bit

When you say you've updated all of the drivers - have you apllied the latest PSP (Proliant Support Pack) ?