Lenovo ThinkServer RD650, User Manual

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LSI Corporation
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12Gb/s MegaRAID SAS Software User Guide

March 2014
Chapter 12: Using MegaRAID Advanced Software
Managing Link Speed
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Scenario #2 : If some of the drives in a configuration are removed and re-inserted, the controller considers the
drives to have foreign configurations.
Import or clear the foreign configuration. If you select Import , automatic rebuilds will occur in redundant virtual
drives.
NOTE Start a consistency check immediately after the rebuild is complete to
ensure data integrity for the virtual drives. See
Running a Consistency
Check , for more information about checking data consistency.

Scenario #3: If all of the drives in a virtual drive are removed, but at different times, and re-inserted, the controller
considers the drives to have foreign configurations.
Import or clear the foreign configuration. If you select Import , all drives that were pulled before the virtual drive
became offline will be imported and will be automatically rebuilt. Automatic rebuilds will occur in redundant
virtual drives.

Scenario #4: If the drives in a non-redundant virtual drive are removed, the controller considers the drives to
have foreign configurations.
Import or clear the foreign configuration. No rebuilds will occur after the import operation because there is no
redundant data to rebuild the drives.
12.13 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.