The LUN state of a replicated LUN is reported by multipathing as "failed" on the Disaster Recovery node.
The paths are listed as "failed", then "active", then "failed" and so on in a circular fashion and they change their status every 5 seconds.
mpathr (3600601602ed04400b28b035e9f5e7c3b) dm-11 DGC ,VRAID size=150G features='1 queue_if_no_path' hwhandler='1 emc' wp=rw |-+- policy='service-time 0' prio=4 status=active | |- 14:0:0:8 sdal 66:80 failed ready running | `- 13:0:0:8 sdak 66:64 failed ready running `-+- policy='service-time 0' prio=1 status=enabled |- 12:0:0:8 sdai 66:32 failed ready running `- 11:0:0:8 sdag 66:0 failed ready running
Each path to the replicated LUN is also triggering console/syslog messages like
Feb 24 03:11:03 db-dr01 multipathd: mpathr: sdag - emc_clariion_checker: Active path to inactive snapshot WWN 600601602ed04400b28b035e9f5e7c3b.
- Red Hat Enterprise Linux 7.3
- Kernel version 3.10.0-514.el7.x86_64 x86_64
- device mapper multipathing
- 2 x EMC Unity 300 arrays connected via iSCSI, one array hosting primary LUNs, the other disaster recovery replicated LUNs using native async replication between the production and DR LUNs.
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