HP XP P9500 Storage - Manual (Page 71)

5. Power on the main systems, and make sure that they are ready to resynchronize operations.
If you suspend any pairs in Step 2, you can also resynchronize (Resume Pair) those pairs now.
Miscellaneous maintenance
This section provides miscellaneous maintenance information and procedures.
ICKDSF maintenance
A pair must be suspended before performing ICKDSF maintenance on the M-VOL. Write operations
to the M-VOL that specify normal authorization are duplicated on the R-VOL. Write operations with
diagnostic or device support authorization (for example, ICKDSF) are completed at the M-VOL
only.
Miscellaneous maintenance 71