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. PR5 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.

  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.
    • The Current Speed column displays the current negotiated logical link rate of the phy.
  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, 8GT/s, and 16GT/s for MR Gen10 plus and Gen11 controllers.

    The lane speed values are Unknown, 2.5GT/s, 5GT/s, 8GT/s, 16GT/s, and 32GT/s for MR Gen10 plus and Gen12 controllers.

    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.