• Check the status of the RAID group.
When rebuild/copyback or redundant copy is being performed in a RAID group with a "High" rebuild priority,
the performance may be reduced until the operation is complete.
• Check the cache parameter settings of the volumes.
The performance may be reduced when multiple sequential read accesses simultaneously occur for volumes
that do not have the Force Prefetch mode enabled. Enable the Force Prefetch mode and specify the
appropriate value for the Prefetch Limit.
This may be caused by accesses that are used for video distribution businesses.
■
When the Server Does Not Recognize the Volumes
Check the points that are shown below. If the problem cannot be resolved, leave the
ETERNUS AF alone and
contact your maintenance engineer.
• Check the status of the ETERNUS AF and other devices such as network devices connecting the server and the
ETERNUS AF, and ensure that there are no problems with the power supply.
• Check if an error occurs in a path by using a path management tool such as ETERNUS Multipath Manager.
Refer to the relevant manuals and take the required actions.
■
When a Server HBA Fails and Needs to Be Replaced
This section explains the procedure that is required when the HBAs on the server need to be replaced due to an
FC card failure.
Only an overview of this procedure is provided here. For details, refer to related manuals.
Note
Identifiers such as WWNs and IP addresses of ports persist even after CMs, CAs, and ports of the
ETERNUS
AF are changed.
● FC Card Replacement
The following procedure explains how to replace the FC card.
1 Use ETERNUS Web GUI or ETERNUS CLI to check the WWN, the host affinity and the other settings of
the FC card that is to be removed, and then record the settings.
2 Replace the FC card on the server.
(1) Turn off the server where the FC card is to be replaced.
(2) Replace the FC card.
3 Use ETERNUS Web GUI or ETERNUS CLI to specify the required settings.
(1) Change the WWN, host affinity, and other settings of the removed FC card.
Set the WWN, host affinity, and other settings of the new FC card by referring to the information
recorded in Step 1.
(2) When a switch is used, the WWN zoning settings need to be changed. For details on this setting,
refer to relevant manuals of the switch.
4 After completing the settings, confirm that access from the server is available.
● LAN Card Replacement
The following procedure explains how to replace the LAN card.
6. Troubleshooting
Check List
64 Operation Guide (Basic)
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