Deployment Guide

Table 27. Diagnostics for replication setup – Creating a replication set (continued)
Answer Possible reasons Action
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 28. 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).
No Communication link is down.
Review event logs for indicators of a specific fault in a host or replication data
path component.
Has a replication run successfully?
Table 29. Diagnostics for replication setup: Checking for a successful replication
Answer Possible reasons Action
Yes System functioning properly No action required.
No Last Successful Run shows N/A
• In the Volumes topic, click the volume that is a member of the replication
set.
○ Select the Replication Sets table.
○ Check the Last Successful Run information.
• If the replication has not run successfully, use the PowerVault Manager to
replicate as described in the topic about working in replications in the Dell
EMC PowerVault ME4 Series Storage System Administrator’s Guide.
Cabling for replication 91