What's typical read and write speeds for this device running a raid5?  I'm getting 586 write and 374 read with AJA, which seems a bit slow???  I've an open ticket with tech support that's been going on for a while and can't get a definitive asnwer if this is normal for this unit or not.  They've had me change the powersavinglevel from "0" to "3" and no idea as to the reasoning behind this.  Any help or ideas?