Compaq Infortrend manual Logical Drive, Logical Volume, and Logical Partitions

3.Will those storage volumes be accessed in a multi-host or multi-path configuration?

4.Fault Tolerance: Enabling the controllers for transparent failover and failback. See 10.1.4

Logical Drive, Logical Volume, and Logical Partitions

Listed below are the basics about configuring a logical drive for a redundant controller system:

!All configuration options are available through the Primary controller. Two controllers behave as one, and there is no need to repeat the configuration on another controller.

!Drive configuration process is the same using single or redundant controllers.

!Logical units can be manually assigned to different controllers to facilitate the active-active configuration.

!There is no limitation on drive allocation. The members of a logical drive do not have to come from the same drive channel. Grouping drives from different drive channels helps reduce the chance of downtime by channel bus failure.

!Each logical drive can be configured a different RAID level and several logical drives can be striped across to compose a larger logical volume.

!Each of the logical units (logical drives, logical volumes, or one of their partitions) can be made available on host ports through host LUN mapping. Each of these logical units appears as a virtual hard drive.

Redundant Controller 10-5