I currently perform some tests on a PCIE gen. 2 x8 raid controller board (RS2BL080) plugged into a x8 PCIE gen 1.1 slot of a motherboards running linux debian lenny 64
I use 6 SSD drives with individual write speed of 180MBps.
The write bandwidth I measure with the 6 drives assembled in a R0 array seems to saturate at 600MBps (against more than 1GBps theorically).
This data rate seems to be near of the limitation of a PCIE x4 bandwith I measure with a custom personnal board, so I suspect that the raid controller is not well autonegociated at x8 on the pcie link
Did you know if there is a way to retrieve the number of lanes autonegociated between the motherboard and the raid controller board?
Retrieving data ...