FCNOCOPY


>>-+----------+------------------------------------------------><
   +-FCNOCOPY-+   
   '-FCNC-----'

FCNOCOPY specifies that if FlashCopy® is used to perform the copy operation, then the ESS subsystem does not perform a physical copy of the data. If FCNOCOPY is not specified and FlashCopy is used to perform the operation, then the ESS subsystem performs a physical copy of the data in order to release the subsystem resources that are used to maintain the FlashCopy relationship (a virtual copy of the data).

When FlashCopy is not used to perform the copy operation, the FCNOCOPY keyword is ignored.

Note:

Do not specify the FCNOCOPY keyword with the FASTREPLICATION(NONE) keyword.
If FCNOCOPY is not specified and the ESS subsystem performs the physical copy, the DFSMSdss copy operation will not be delayed. However, performing the physical copy uses subsystem resources, which can impact the performance of other I/O operations that are issued to the ESS.
Be aware that if you use the FCNOCOPY keyword, you must withdraw the FlashCopy relationship in which the copy is no longer needed in order to free up the subsystem resources that maintain the FlashCopy relationship. You can withdraw the FlashCopy relationship by performing one of the following options:
- Initiate a dump of the target of the copy and specify the FCWITHDRAW keyword on the DUMP command.
- Initiate the TSO FCWITHDR command.