you're using usb2, right? I know that the device is usb2, but are your drivers?

you need either sp1 or the hotfix to use usb2 speeds.

Get sisoft sandra and benchmark the drive. it SHOULD be able to sustain more than that.

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AMD Athlon 1700 (@2200mhz from 1466 sod the noise!) - 768mb pc3200 - 200GB Maxtor - Pioneer 106 - GF4 Ti4200 - twinhan/visionplus pci dvb-t - random pci analogue tv tuner - A7v600-x (to replace the a7n8x-d that died...) - random 17\" CRT
Sony STR-DE425 & Eltax c205s;
xBox w/20GB HDD- executer 2.3b;
xBox - standard;
Konica/Minolta dimage z10 w/2x512mb SD;
iRiver h340;
A silly amount of Cat-5 and usb cables