The services SIM of remote copy option allows you to specify whether services SIMs are reported to the host. During TC operations, the primary and secondary storage systems generate a service SIM each time the pair status of the P‑VOL or S‑VOL changes for any reason, including normal status transitions (for example, when a newly created pair becomes synchronized). SIMs generated by the primary storage system include the P‑VOL device ID (byte 13), and SIMs generated by the secondary storage system include the S‑VOL device ID (byte 13).
If you enable the services SIM of remote copy option for the storage system, all CUs will report services SIMs to the host. If desired, you can enable this option at the CU level to configure specific CUs to report services SIMs to the host.