Transferring operations back to the primary site if pairs were deleted

True Copy User Guide for VSP One Block
Version
10.4.x
Audience
anonymous
Part Number
MK-23VSP1B020-04
  1. At the primary site, bring up the host. Make sure that TC components are operational.
  2. At the primary system, split all pairs on the primary system.
  3. At the primary system, delete the TC association with the secondary systems.
  4. At the primary and secondary systems, change path and port settings.
    • To use the same switches, change the operating mode to the opposite direction.
    • To use the same extenders, change the operating mode to the opposite direction. The boxes/nodes connected to the primary system must be set to channel-mode, and the boxes/nodes connected to the secondary systems must be set to device-mode.
  5. At the secondary site, set TrueCopy operations in the reverse direction.
  6. At the secondary site, create a TC pair in the reverse direction, and synchronize the old P-VOL with the S-VOL.
    Execute the paircreate command in CCI without specifying the -nocopy option. Confirm that the pairs are created and that status is PAIR.

    If a failure occurs after the one volume capacity of a TC pair can be expanded, the swap resync operation of the TC pair cannot be performed because the capacity of both the volumes is not the same. Make sure to expand the other volume capacity so that the capacity of both the volumes is the same, and then retry the operation.

  7. At the secondary system, halt host operations and vary the P-VOL (old S-VOL) offline. This maintains synchronization of the pairs.
  8. At the secondary system or the primary system, which is an old secondary system , split the pairs and destage held data from cache.
    Confirm that the pairs are split and status is PSUS before proceeding. If an error occurs, resolve it before proceeding.

    If a failure occurs after the one volume capacity of a TC pair can be expanded, the swap resync operation of the TC pair cannot be performed because the capacity of both the volumes is not the same. Make sure to expand the other volume capacity so that the capacity of both the volumes is the same, and then retry the operation.

  9. At the secondary system or the primary system, which is an old secondary system, release the pairs.
  10. At the primary and secondary systems, change the path and port settings.
    • To use the same switches, change the operating mode back to the original direction.
    • To use the same channel extenders, change the operating mode back to the original direction. The boxes/nodes connected to the primary system must be set to channel-mode, and the boxes/nodes connected to the secondary systems must be set to device-mode.
  11. At the primary system, check that it is ready to create TrueCopy pairs.
  12. At the primary system, create TrueCopy pairs or set TrueCopy pairs to the original direction.
    If all P-VOL and S-VOL are synchronized, execute the paircreate command in CCI by specifying the -nocopy option.

    If a failure occurs after the one volume capacity of a TC pair can be expanded, the swap resync operation of the TC pair cannot be performed because the capacity of both the volumes is not the same. Make sure to expand the other volume capacity so that the capacity of both the volumes is the same, and then retry the operation.

  13. Vary the primary system and P-VOLs online, and start host operations.