Deployment Guide

Table 28. Diagnostics for replication setup: Using the replication feature (continued)
Answer Possible reasons Action
● Verify cabling paths between replication ports and switches are visible
to one another.
● Verify that cable connections are securely fastened.
● Inspect cables for damage and replace if necessary.
No A system does not have a pool
that is configured.
Configure each system to have a storage pool.
Can you create a replication set?
After valid cabling, and network availability, create a replication set by selecting Action > Create Replication Set from the
Replications topic.
Table 29. Diagnostics for replication setup – Creating a replication set
Answer Possible reasons Action
Yes System functioning properly. No action required.
No On controller enclosures
equipped with iSCSI host
interface ports, replication set
creation fails due to use of
CHAP.
If using , see the topics about configuring CHAP and working in
replications within the Dell EMC PowerVault ME4 Series Storage System
Administrator’s Guide.
No Unable to create the secondary
volume (the destination volume
on the pool to which you
replicate data from the primary
volume).
● Review event logs for indicators of a specific fault in a replication data
path component. Follow any Recommended Actions.
● Verify valid specification of the secondary volume according to either of
the following criteria:
○ A conflicting volume does not exist.
○ Available free space in the pool.
No Communication link is down.
Review event logs for indicators of a specific fault in a host or replication
data path component.
Can you replicate a volume?
Table 30. Diagnostics for replication setup – Replicating a volume
Answer Possible reasons Action
Yes System functioning properly. No action required.
No Nonexistent .
● Determine existence of primary or secondary volumes.
● If a replication set has not been successfully created, Action > Create
Replication Set on the Replications topic to create a replication.
● Review event logs (in the footer, click the events panel and select
Show Event List) for indicators of a specific fault in a replication data
path component. Follow any Recommended Actions.
No Network error occurred during
in-progress replication.
● Review event logs for indicators of a specific fault in a replication data
path component. Follow any Recommended Actions.
● Click in the Volumes topic, and then click a volume name in the
volumes list. Click the Replication Sets tab to display replications and
associated metadata.
● Replications that enter the suspended state can be resumed
manually (see the Dell EMC PowerVault ME4 Series Storage System
Administrator’s Guide for additional information).
96 Cabling for replication