Planning use of licensed functions

Licensed functions are storage unit system operating system and software functions. These include both required features and optional features.

The following categories represent the types of DS6000™ series licensed functions that are available.

Operating environment licensing
You must order an operating environment license for every DS6800 system. The extent of IBM^® authorization acquired through the DS6800 feature codes (50xx) must cover the physical capacity of the DS6800 system, where system is defined as the base enclosure and all attached expansion enclosures.
DS6000 series Copy Services
The DS6000 series offers licensing options, which are available for the DS6800 FlashCopy^® (point-in-time copy) feature codes 52xx and Remote Mirror and Copy feature codes 53xx, as follows:
- If the function is used with open systems data only, a license is required for only the total physical capacity configured as Fixed Block (FB).
- If the function will be used with zSeries^® data only, a license is required for only the total physical capacity configured as Count Key Data (CKD).
- If the function is used with both open systems and zSeries data, a license is required for the total physical capacity of the DS6800 system including the DS6000 Expansion Enclosures.
In addition, the license scope (FB, CKD, or entire machine) is client managed through an IBM Web-based application. This allows you to change the license scope on a given machine as your business requirements change.
Parallel access volumes
The parallel access volume (PAV) function is an optional feature (code 51xx) that enables zSeries hosts to conduct multiple concurrent I/O operations. PAV requires the purchase of the FICON^® attachment feature code 5915.

A PAV license authorizes the use of PAV at the specified capacity. The authorization level provided by each feature code is stated within the feature code description. The unit represents physical capacity, where a TB (terabyte) equals one trillion bytes. The total authorization level for this licensed function is the sum of the units (terabytes) associated with all the purchased feature codes.

These features can be purchased in any sequence or combination. The extent of IBM authorization is increased by purchasing additional feature codes.

This licensed function is authorized on the basis of physical capacity and has a license scope of CKD. The total authorization level must be equal to or greater than the total amount of physical capacity within the DS6800 system that will be logically configured as CKD.

The following sections can assist you in planning your licensed functions.

Note: In the context of DS6800 licensed functions, a "DS6800 system" refers to the DS6800 base enclosure and all physically attached DS6000 expansion enclosures.

Enablement
Authorization
Management
Activation
Enforcement
License upgrades
Deactivation

Enablement: Licensed functions for a DS6800 system can be enabled by acquiring the DS6800 licensed function feature codes.

Authorization: The acquisition of licensed function feature codes establishes the extent of IBM authorization level, or the license size in terms of physical capacity, for that licensed function. A DS6800 system's total authorization level for a given licensed function is the sum of the units that are associated with the acquired feature codes on that DS6800. Each licensed function feature code on a DS6800 establishes the authorization level for the entire DS6800 system. For example, a DS6800 system with a Model 511 or 522 base enclosure and two Model EX1 or EX2 expansion enclosures requires the acquisition of licensed function feature codes only on the Model 511 or 522. For licensed functions that are authorized on the basis of physical capacity, the authorization levels that are established by the feature codes on the Model 511 or 522 must also include the physical capacity of the attached Model EX1 or EX2 expansion enclosures. Each licensed function feature code is applicable to only one specific serial code for a DS6800 and is not transferable to other storage units.

Management: After licensed function feature codes are acquired, they are managed using the IBM Disk Storage Feature Activation (DSFA) Web site. Management activities include:

Selection of a license scope and
Assignment of a license value.

Activation: Licensed functions are activated by installing the feature activation codes on the DS6800 system. Feature activation codes are available on the IBM Disk Storage Feature Activation (DSFA) Web site.

Enforcement: The DS6800 Licensed Machine Code contains logic and other technology to maintain compliance with established authorization levels. You can logically configure physical capacity up to the extent of your authorization level for each storage type. If you have multiple licensed functions with the same license scope, the extent of IBM authorization is defined by the licensed function with the lowest authorization level.

License upgrades: The authorization level for a licensed function can be increased by acquiring additional licensed function feature codes.

License scope: The license scope refers to the types of storage and servers that the function can be used with:

ALL: The function can be used with data from all attached servers.
CKD (count key data): The function can be used with data only from FICON-attached servers.
FB (fixed block): The function can be used with data only from fibre-channel-attached servers.

You do not select your license scope when you order licensed function feature codes. If a licensed function has multiple license scope options, you can select a license scope when you are retrieving your feature activation code from the DSFA Web site. However, you must consider license scope when you determine the authorization level that is required for your licensed functions. For example:

Assume a 10 TB machine (total physical capacity) is logically configured as follows:
- 5 TB of FB capacity
- 5 TB of CKD capacity
Point-in-time copy is used on some portion of data from both FICON-attached servers (CKD capacity) and fibre-channel-attached servers (FB capacity). This means the point-in-time copy scope must be selected as ALL within DSFA. As a result, a 10 TB point-in-time copy authorization level is required because the total configured FB and CKD capacity will be 10 TB.
Remote mirror and copy is used only on some portion of data from fibre-channel-attached servers (FB capacity). This means the remote mirror and copy scope must be selected as FB within DSFA. As a result, only a 5 TB remote mirror and copy authorization level is required because the total configured FB capacity will be 5 TB.
The following licensed function authorization levels are required:
- 10 TB operating environment license
- 10 TB point-in-time copy
- 5 TB remote mirror and copy
- FICON attachment.

You can logically configure physical capacity (disk drives) up to the extent of your authorization level for that storage type. If you have multiple licensed functions with the same license scope, the extent of IBM authorization is defined by the licensed function with the lowest authorization level. For example:

Assume a 10 TB machine (total physical capacity) with the following licenses and license scope designations:
- Operating environment license is 10 TB with scope = ALL
- PAV is 7 TB with scope = CKD
- Point-in-time copy is 9 TB with scope = ALL
- Remote mirror and copy is 6 TB with scope = FB
Point-in-time copy has the lowest "ALL" scope specification so that the amount of FC and CKD storage (total capacity) that can be configured is limited to 9 TB, even though the operating environment license value is 10 TB.
Remote mirror and copy has the lowest "FB" scope specification so the amount of FB storage that can be logically configured is limited to 6 TB.
PAV has the lowest "CKD" scope specification so that the amount of CKD storage that can be logically configured is limited to 7 TB.
The scope selection for the activated licensed functions enables the following configurations:
- Up to 7 TB of CKD capacity
- Up to 6 TB of FB capacity
- Up to only 9 TB of total capacity

Using DSFA, you can change the license scope at any time and obtain a new feature activation code to apply to your machine. Application of the new feature activation code to your machine is a nondisruptive activity for the following license scope changes:

Changing CKD to ALL
Changing FB to ALL

Applying the new feature activation code for the following license scope changes is a disruptive activity and requires a power cycle of the machine before the change is effective:

Changing ALL to CKD
Changing ALL to FB
Changing CKD to FB
Changing FB to CKD

Deactivation: A licensed function can be deactivated by accessing the DSFA Web site and changing the license value of zero (0.0 TB) or Off. A new feature activation code is generated and when you install it into your machine, the function is deactivated during the next initial machine load (IML) of the machine.

Note: Deactivation of a licensed function is a disruptive activity and requires a machine IML.

When you deactivate a licensed function using the DSFA Web site, the licensed function feature codes that you acquired remain assigned to the machine. This means that you do not need to reacquire the licensed function feature codes if you want to reactivate the licensed function at a future date.

You can reactivate a deactivated licensed function by accessing the DSFA Web site and changing the license value to a non-zero value. A new feature activation code is generated and when you install it into the machine, the function is activated. Reactivation is a nondisruptive activity.