Draft Document for Review December 5, 2019 4:33 pm 8456ch_Configflow.fm Chapter 10. Configuration flow  259 1. Install license keys: Activate the license keys for the DS8900F storage system. For more  information about activating licensed functions, see Chapter 9, “IBM DS8900F features  and licensed functions” on page 231. 2. Create arrays: Configure the installed flash drives as RAID-6 which is now the default and  preferred RAID configuration for IBM DS8900F. 3. Create ranks: Assign each array to be a fixed-block (FB) rank or a count key data (CKD)  rank. 4. Create extent pools: Define extent pools, associate each one with Server 0 or Server 1,  and assign at least one rank to each extent pool. To take advantage of storage pool  striping, you must assign multiple ranks to an extent pool. For more information about  storage pool striping, see “Storage pool striping: Extent rotation” on page 168, and  “Storage pool striping” on page 398. 5. Consider other controls and monitoring when working with space-efficient volumes. For  more information, see  IBM DS8880 Thin Provisioning (Updated for Release 8.5) ,  REDP-5343. 6. Configure the fibre channel ports: Define the topology of the fibre channel ports. The port  type can be Switched Fabric or Fibre Channel Protocol (FCP), or Fiber connection  (FICON). 7. Create the volume groups for open systems: Create volume groups where FB volumes are  assigned. 8. Create the host connections for open systems: Define open systems hosts and their Fibre  Channel (FC) host bus adapter (HBA) worldwide port names (WWPNs). Assign volume  groups to the host connections. 9. Create the open systems volumes: Create striped open systems FB volumes and assign  them to one or more volume groups.  10.Create the IBM Z logical control units (LCUs): Define their type and other attributes, such  as subsystem identifiers (SSIDs). 11.Create the striped IBM Z volumes: Create IBM Z CKD base volumes and parallel access  volumes (PAV) aliases for them. Important:  If you plan to use IBM Easy Tier (in particular, in automatic mode), select  the  All pools  option to receive all of the benefits of Easy Tier data management. For  more information, see 6.6, “IBM Easy Tier” on page 172. Important:  If data at rest encryption will be activated, the encryption configuration must  be performed before starting the logical configuration.  explicitly performed by the user. For more information about the DS GUI, see Chapter 11,  “DS8900F Storage Management GUI” on page 263. If you perform logical configuration by using the DS CLI, the following steps provide a  high-level overview of the configuration flow. For more detailed information about using and  performing logical configuration with the DS CLI, see Chapter 12, “Configuration with the  command-line interface” on page 371. The following is the general configuration flow: