I have a two year old, Dell 9200 with plenty of RAM, dual core, 2 x 250gb hdd, etc, etc. running under XP Pro. These two hdd are plugged into SATA 0 and 1. I have RAID off. Current setup is SATA 0 and 1 have the original 250gb; SATA 2 has a DVD writer/player; SATA 3 a 500gb hdd; and SATA 5 and desktop docking device.
I have just bought a 1tb WesternDigital 10EADS hdd to back-up my image files. When plugged into an eSATA docking station and connected to one of the mb SATA ports, it is so slow, that I did some investigations.
Using HD Tune, to benchmark the results, this is what came up.
I plugged the 1tb hdd into the mb as an internal drive; in the desktop docking station (eSATA); in the desktop docking station (USB) and in external caddie (SATA only.)
Will not post the full results as they are remarkably consistent, but generally, of the 6 x SATA ports, 1, 3, 5 give average results of Transfer Time 84 mb/s; Access Time 19 ms; Burst Rate 153 mb/s and CPU usage 5%.
Ports 2 and 4 give 40mb/s; 19ms; 4mb/s and 48%.
These result are all similar for eSATA, SATA and USB with only small variations in the figures.
Why would all the ports give different speeds? Surely the controller is not different for odd and even numbered ports?
Would be really grateful if someone could throw some light on this as I am totally perplexed (not to mention, annoyed!) I would love to get all the ports at the same speed but don't know where to look or what to tweak.