Managing PCIe Storage Interface
A lane represents a set of differential signal pairs, one pair for transmission and one pair for reception, similar to SAS phys.
The Managing PCIe Storage Interface feature allows you to change the lane speed between a controller and an expander or between the controller and a drive that is directly connected to the controller. MRSA 2.4 and later versions support both SAS/SATA topologies and PCIe topologies using the same device phys to manage the lane speed.
Note: Lane speeds for UBM backplanes cannot be modified.
Perform the following steps to change the lane speed.