The storage administrator must control ICKDSF activity to primary and secondary PPRC-managed volumes. PPRC cannot copy some ICKDSF operations from the primary to the secondary volumes. If you plan to use ICKDSF to repair either a primary or secondary volume, first remove the volume pair from the session. After the ICKDSF function is complete, reestablish the session with a CESTPAIR command.
Performing an ICKDSF repair is described in Steps to perform an ICKDSF repair on a PPRC-managed primary volume: and Steps to perform an ICKDSF repair on a PPRC-managed secondary volume:.
If you are planning to repair or replace a primary volume, you might want to use the P/DAS function to minimize impact to the application I/O while the error on the primary volume is being corrected.
For additional information about specific error conditions, refer to Putting PPRC error recovery procedures into effect.
For additional information about the P/DAS function, refer to Peer-to-Peer Remote Copy dynamic address switching (P/DAS).