A controller-assigned number from 1 to n, where n is the maximum number of logical drives you can create in the storage subsystem.
These numbers may change as you create and delete logical drives and arrays.
These numbers are displayed in the Storage Subsystem Profile and in the Recovery Guru to identify specific arrays.
Note: This number is not synonymous with Logical Unit Number (LUN) and is not known or used by the application host. It is needed by the storage management software.