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Foreign Configurations in Cable Pull and Drive Removal Scenarios
If one or more drives are removed from a configuration, by a cable pull or drive removal, for
example, the configuration on those drives is considered a foreign configuration by the RAID
controller.
The following scenarios can occur with cable pulls or drive removals. Use the Foreign
Configuration Preview screen to import or clear the foreign configuration in each case.
Note:
Scenario #1: If all 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:
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:
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 then 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.
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 must have the same maximum link speed setting. If the phys in a SAS port
have different link speeds, the firmware uses the lowest link speed for that SAS port.
Follow these steps to change the link speed.
1. Right-click a controller in the left frame of the MegaRAID Storage Manager main menu and
select Manage Link Speed.
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Using the MegaRAID Advanced Software
DB09-000202-05 37857-02
Rev. F - May 2011
If you want to import the foreign configuration in any of the following scenarios, you
should have all of the drives in the enclosure before you perform the import
operation.
Start a consistency check immediately after the rebuild is complete to ensure data
integrity for the virtual drives.
Start a consistency check immediately after the rebuild is complete to ensure data
integrity for the virtual drives.
Copyright © 2011 by LSI Corporation. All rights reserved.
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