IBM DS8000 - Manual (Page 193)

Chapter 9. Configuration planning 171
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.
20 TB
FB
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
25 TB
CKD
User cannot FlashCopy
any FB
User authorize to
FlashCopy
up to 25 TB
20 TB (FB) +
25 TB (CKD) +
--------
45 TB total capacity
--------