1. restore - change made to the r1 are discarded All tracks on the source (R1) device are marked as invalid. https://www.dell.com/support/manuals/en-us/solutions-enabler/esd_p_se_srdf_family_cli_user_guide_10/restore-srdf-pairs-full?guid=guid-09288669-7a2b-4384-8366-185b4ef217a5&lang=en-us 2. suspend - srdf link are set to not ready When the suspend is complete, the devices are suspended on the SRDF links and their link status is set to not ready (NR) https://www.dell.com/support/manuals/en-us/solutions-enabler/esd_p_se_srdf_family_cli_user_guide_10/suspend-io-on-links?guid=guid-c325b00b-2e0f-4677-8c57-2dcbe71bbafd&lang=en-us 3. split: enable access on both r1 and r2 devices 4. establish: resumes normal srdf mirroring Traffic is resumed on the SRDF links https://www.dell.com/support/manuals/en-us/solutions-enabler/esd_p_se_srdf_family_cli_user_guide_10/establish-an-srdf-pair-incremental?guid=guid-0d73664a-f28a-4cc2-a339-709062eeb46e&lang=en-us