Storage partitions are defined by assigning a logical drive-to-LUN mapping, which grants a host group or host access to a particular logical drive (or a number of logical drives) in a storage subsystem.
The Storage Partitioning Wizard helps you to quickly define a single storage partition. It guides you through the major steps required to specify which host groups, hosts, logical drives, and associated Logical Unit Numbers (LUNs) are to be included in the partition.
If no storage partition topology has been defined (and the Storage Partitioning feature has been enabled), an informational dialog is displayed each time the Mappings View is selected. It emphasizes that the following topology must be defined before defining the actual storage partition:
1
Define the host groups. Host groups should ONLY be defined if you have two or more hosts that will share access to the same logical drives. Otherwise, start at step 2. For more information, see Defining a Host Group.
2
Define the hosts that will access logical drives on the storage subsystem. For more information, see Defining a Host.
3
Define the host ports that will allow a host to access logical drives on the storage subsystem. For more information, see Defining a Host Port.
You can include a Secondary Logical Drive in a partition. However, any host(s) that are mapped to this logical drive will be unable to access it until it is promoted to a Primary Logical Drive.
The Define Storage Partitioning option will FAIL if:
All logical drive-to-LUN mappings are defined.
You attempted to create a logical drive-to-LUN mapping for a host group that conflicts with an established logical drive-to-LUN mapping for a host in the host group.
You attempted to create a logical drive-to-LUN mapping for a host in a host group that conflicts with an established logical drive-to-LUN mapping for the host group.
The Define Storage Partitioning option will be UNAVAILABLE if:
The Storage Partitioning premium feature is not enabled. For information on enabling premium features, see Enabling Premium Features.
No valid host groups or hosts exist in the Mappings View.
No host ports have been defined for the host being included in the partition.
Procedure
1
From the Topology pane of the Mappings View, select any node or object then select the Mappings >> Define >> Storage Partitioning pull-down menu option. Select Define Storage Partitioning from the right-mouse pop-up menu when the storage subsystem node, undefined mappings node, Default Group, or a host node is selected.
2
Follow the directions on each of the screens and press Next when ready to move to the next screen.
Note: Each Wizard screen has context-sensitive help. Press Help to receive help for that particular screen.
A Preview of the Storage Partitioning Wizard
The following describes the screens you will encounter when using the Storage Partitioning Wizard:
The Introduction screen of the Wizard describes the process of creating a storage partition, and reminds you that the required logical drives and host groups and/or hosts must be created before continuing the Wizard.
The Select Host Group or Host screen allows you to select a single host group or host for which access is to be defined.
The Select Logical Drives/LUNs screen guides you through the process of selecting a logical drive, then assigning a LUN that the host group or host will use to access the logical drive. The Wizard is completed on this screen.