Managing Link Speed
Keywords: MegaRAID SAS SW UG

> Managing Link Speed

> The Managing Link Speed feature allows you to change the link speed between the controller and an expander or between the controller and a drive that is directly connected to the controller.

> All phys in a SAS port can have different link speeds or can have the same link speed.

> You can select a link speed setting. However, if phys in a SAS port have different link speed settings and if a phy is connected to a drive or an expander, the firmware overrides the link speed setting you have selected and instead uses the common maximum link speed among all the phys.

> To change the link speed, perform the following steps:

> 1. | Perform one of these actions:

> | Right-click a controller in the left frame of the MegaRAID Storage Manager main menu, and select Manage Link Speed.

> | Select a controller in the left frame of the MegaRAID Storage Manager main menu, and then select Go To > Controller > Manage Link Speed in the menu bar.

> The Manage Link Speed dialog appears, as shown in the following figure.

> Figure 144. Manage Link Speed Dialog

> | The SAS Address column displays the SAS address that uniquely identifies a device in the SAS domain.

> | The Phy column displays the system-supported phy link values. The phy link values are from 0 through 7.

> | The Select Link Speed column displays the phy link speeds.

> 2. | Select the desired link speed from the Select Link Speed field using the drop-down selector.

> The link speed values are Auto,1.5 Gbps, 3.0 Gbps, or 6.0 Gbps.

> NOTE By default, the link speed in the controller is Auto or the value last saved by you.

> 3. | Click OK.

> The link speed value is now reset. The change takes place after you restart the system.

> The message box appears, as shown in the following figure.

> Figure 145. System Restart Required Message

DB09 000202-16 37857-03, Rev R, July 2014
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