Configuring new count key data storage using DS CLI

This section describes how to configure new count key data (CKD) storage within your storage unit for a zSeries host system.

Before you begin, you must be logged into the DS CLI application in interactive command mode. You must also be connected to a storage unit that is used for zSeries systems host storage.

Configuring CKD storage involves two basic processes: the creation of the CKD storage configuration and the configuration of the storage unit I/O ports for zSeries host system attachment. These two basic processes can be performed in the reverse order, but it is better to create storage configurations first. Creating the storage configuration first creates the media to back up configuration data that is not related specifically to the storage configuration.

Configuring new CKD storage involves the following processes:

• Creating CKD extent pools
• Creating arrays
• Creating and associating ranks with extent pools
• Creating logical control units
• Creating CKD volumes
• Creating CKD volume groups (system generated).

  The internal microcode automatically creates the CKD FICON All volume group ID (V10) and automatically assigns all CKD base and alias volumes to this volume group. This volume group ID (V10) is automatically assigned to storage unit I/O fibre channel ports that are configured for FICON I/O operations.

• Configuring fibre-channel I/O ports

• Creating count key data extent pools using the DS CLI
  Complete this task to create CKD volume extent pools. This is the first step in configuring new count key data storage. You can use the DS CLI commands to create extent pools for CKD volumes.
• Creating arrays for CKD volumes using the DS CLI
  Complete this task to create arrays for CKD volumes using the DS CLI commands.
• Creating a rank for CKD volumes using the DS CLI
  Complete this task to create a rank for a CKD volume. A rank is a logically contiguous storage space that is made up of one or more arrays. You want to assign a rank to every unassigned array.
• Creating logical control units for CKD volumes using DS CLI
  The logical control unit (LCU) is the S/390 and zSeries host equivalent of the logical subsystem (LSS) for open systems hosts. The LCU must be defined (created) before CKD logical volumes can be created.
• Creating count key data volumes using the DS CLI
  Complete this task to create count key data (CKD) volumes.
• Correcting a CKD volume configuration error
  Complete this task to correct a count key data (CKD) volume configuration error.
• Configuring fibre-channel I/O ports using the DS CLI
  Complete this task to configure fibre-channel I/O ports using the DS command-line interface.