Hi,
Try removing any extra utilities from your Startup-Sequence if you have any custom ones installed. Addbuffers is one that can eat up some RAM.
On a more technical note, you might be able to change the "Mask" inside of the HDToolBox program for that drive and its partitions to ensure that the drive uses fast RAM instead chip for it's data transfers. As well, check to see how many buffers you have set for each partition - the usual is 30.
Does anyone here have settings that they can forward for this device?