Users guide

95 Intel® RAID Software User Guide
7.9.4.1 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.
Note: T
o import the foreign configuration in any of the following scenarios, you
must have all the drives in the enclosure before you perform the import
operation.
• Scenario 1: If all the drives in a configuration are removed and reinserted, the
controller considers the drives to have foreign configurations.
Import or clear the foreign configuration. If you select Import, automat
ic rebuilds
will occur in redundant virtual drives.
Note: S
tart a consistency check immediately after the rebuild is complete, to ensure
data integrity for the virtual drives.
• Scenario 2: If some of the drives in a configuration are removed and reinserted, the
controller considers the drives to have foreign configurations.
Import or clear the foreign configuration. If you select Import, automat
ic rebuilds
will occur in redundant virtual drives.
Note: S
tart a consistency check immediately after the rebuild is complete, to ensure
data integrity for the virtual drives.
• Scenario 3: If all the drives in a virtual drive are removed, but at different times,
and reinserted, the controller considers the drives to have foreign configurations.
Import or clear the foreign co
nfiguration. 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 nonredundant virtual drive are removed, the controller
considers the drives to have foreign configurations.
Import or clear the foreign configuration. No rebui
lds will occur after the import
operation because there is no redundant data to rebuild the drives.
7.10 Discarding Preserved Cache
If the controller loses access to one or more virtual drives, the controller preserves the data
from the virtual drive. This preserved cache, is preserved until you import the virtual drive
or discard the cache.
Certain operations, such as creating a new virtual drive, cannot be performed if preserved
cache exists.