IBM DS8000 manual 171, User authorize to FlashCopy 25 TB of CKD data

DS8000 with 45 TB disk capacity in total,

25 TB of CKD FlashCopy authorization with license scope of CKD,

45 TB of OEL Licensed function

User cannot FlashCopy any FB

20TB

FB

25 TB

CKD

20 TB (FB) +

25 TB (CKD) +

--------

45 TB total capacity

User authorize to FlashCopy

up to 25 TB

--------

Figure 9-4 User authorize to FlashCopy 25 TB of CKD data

AS illustrated in Figure 9-5 on page 172, the user decides to change the license scope from CKD to ALL and FlashCopy the FB data as well. This increase of licensed scope from CKD to ALL is non-disruptive. Changing the license scope from FB to CKD, or CKD to FB (lateral change), or reduction in license scope from ALL to FB or CKD, will be disruptive and will require an IML. In this example, the user decides to FlashCopy 10 TB of FB and 12 TB of CKD data. The user has disk capacity of 20 TB of FB and 25 TB of CKD. In order to implement the changes, the user now has to purchase a Point-in-Time Copy function authorization of 45 TB, the total FB and CKD capacity.

Chapter 9. Configuration planning 171