I have 6 hard drives in my mac pro and I'm sure some of them are too slow. Western Digital Caviar Black 500gb = 90mb/s write + 111mb/s read Western Digital Caviar Black 500gb = 60mb/s write + 75mb/s read Western Digital Caviar Black 1tb = 80mb/s write + 90mb/s read Western Digital SE Enterprise 1tb =172mb/s write + 175mb/s read Samsung 160GB = 50mb/s write + 51mb/s read Samsung 840 Pro 128gb = 300mb/s write + 380mb/s read The caviar black hd's seem very slow in comparison to the SE. Is there something wrong? The Samsung 160gb is quite old, so that is sort of understandable (maybe?), but these caviar black hd's are only 3 months old. This is quite worrying really as I paid hundreds out for all these hard drives. I performed all the ratings with BM Disk Speed Test at a 5GB stress. How would I upgrade the firmware for these?