When you configure a storage subsystem, you must first create an array from a set of disk drives. Then you must create logical drives from the array. The hosts that are attached to the storage subsystem write data to the logical drives and read data from the logical drives.
Note:
If no hosts are mapped, you see a message that indicates that you must define host access before you can map logical drives.You can create arrays from the unconfigured capacity of a storage subsystem, and you can create logical drives from the free capacity of an array. Unconfigured capacity is made up of the disk drives that are not already assigned to an array. Free capacity is space in an array that has not been assigned to a logical drive.
This figure shows a configured storage subsystem. The storage subsystem has nine disk drives. One array uses six disk drives. The array has been configured into three logical drives. One disk drive has been configured as a hot spare. Two disk drives remain as unconfigured capacity.
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If you want to create a logical drive, use one of these procedures: