# 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. LSA 2.4 and later versions support both SAS/SATA topologies as well as PCIe topologies using the same device phys to manage the lane speed.

Perform the following steps to change the lane speed.

1. In the Controller dashboard, select More Actions > Manage PCIe Storage Interface.
   The Manage PCIe Storage Interface Dialog appears.
   Figure 1. Manage PCIe Storage Interface Dialog
   - The Lane column displays the system-supported lane values.

   - The Status column displays the status of the lane.

   - The Link Number column displays the link numbers.

   - The Lane Speed column displays the lane speed.
2. Select the desired lane speed from the Lane Speed field using the drop-down selector.
   The lane speed values are Unknown, 2.5GT/s, 5GT/s, and 8GT/s.

   By default, the lane speed in the controller is 8GT/s or the value last saved by you.

3. Click Save.
   The lane speed value is now reset. The change takes place after you restart the system.

Parent topic: Managing Controllers