Link between Site B and Mediator down and Site A down
cluster::*> snapmirror mediator show Mediator Address Peer Cluster Connection Status Quorum Status ---------------- ---------------- ----------------- ------------- 10.237.86.17 C1_cluster unreachable true SnapMirror consistency group relationship status is out of sync. C2_cluster::*> snapmirror show -expand Source Destination Mirror Relationship Total Last Path Type Path State Status Progress Healthy Updated ----------- ---- ------------ ------- -------------- --------- ------- -------- vs0:/cg/src_cg_1 XDP vs1:/cg/dst_cg_1 Snapmirrored OutOfSync - false - vs0:zrto_cg_655724_188a_RW1 XDP vs1:zrto_cg_655755_188c_DP1 Snapmirrored OutOfSync - false - vs0:zrto_cg_655733_188a_RW2 XDP vs1:zrto_cg_655762_188c_DP2 Snapmirrored OutOfSync - false - vs0:zrto_cg_655739_188b_RW1 XDP vs1:zrto_cg_655768_188d_DP1 Snapmirrored OutOfSync - false - vs0:zrto_cg_655748_188b_RW2 XDP vs1:zrto_cg_655776_188d_DP2 Snapmirrored OutOfSync - false - 5 entries were displayed. Site B cluster is unable to reach Site A. C2_cluster::*> cluster peer show Peer Cluster Name Cluster Serial Number Availability Authentication ------------------------- --------------------- -------------- -------------- C1_cluster 1-80-000011 Unavailable ok
Force a failover to enable I/O from Site B and then establish a zero RTO relationship from Site B to Site A.
Complete the following steps to perform a forced failover on Site B.
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Unmap all LUNs belonging to the consistency group from Site B.
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Delete the SnapMirror consistency group relationship using the force option.
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Enter the snapmirror break command on the consistency group constituent volumes to convert volumes from DP to RW, to enable I/O from Site B.
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Boot up the Site A nodes to create a zero RTO relationship from Site B to Site A.
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Release the consistency group with relationship-info-only on Site A to retain common Snapshot copy and unmap the LUNs belonging to the consistency group.
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Convert volumes on Site A from RW to DP by setting up a volume level relationship using either Sync policy or Async policy.
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Issue the snapmirror resync to synchronize the relationships.
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Delete the SnapMirror relationships with Sync policy on Site A.
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Release the SnapMirror relationships with Sync policy using relationship-info-only true on Site B.
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Create a consistency group relationship from Site B to Site A.
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Perform a consistency group resync from Site A, and then verify that the consistency group is in sync.
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Rescan host LUN I/O paths to restore all paths to the LUNs.