Fujitsu ETERNUS DX60 S2 User Manual page 85

Chapter 7 Troubleshooting
7.1 Check List
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When I/O access is slow
Check the following points: When the cause is not identified, contact your maintenance engineer.
• Check that the ambient temperature does not exceed the operating environment conditions.
If so, Nearline SAS disk performance may be reduced.
• Click the icon of each part in the Storage System Status screen of ETERNUS Web GUI to
check if an abnormality is detected in ETERNUS DX Disk storage system parts.
If an abnormality is detected, contact your maintenance engineer.
• Check the path status.
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• Check the loading of the ETERNUS DX Disk storage system. If the load is out of balance
because of operation content changing and so forth.
• Check the transfer speed of the FC port.
If the transfer speed for the ETERNUS DX Disk storage system is different from the server or
the FC switch, set the same transfer speed as the server or FC switch.
• Check the number of command queues in the server.
When there are no problems in the process capacity of the server, adjust the number of
command queues so that the I/Os are issued for the appropriate number.
For details on the number of command queues, refer to "User's Guide -Server Connection-".
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When the server does not recognize the volumes
Check the following points: If none of these resolve the problem, leave the ETERNUS DX Disk
storage system alone and contact your maintenance engineer.
• Check the status of the ETERNUS DX Disk storage system and other devices such as
network devices connecting the server and the ETERNUS DX Disk storage system, 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.
ETERNUS DX60 S2 Disk storage system User's Guide -Operation-
When using the ETERNUS Multipath Driver, start ETERNUS Multipath Manager.
If an abnormality is detected in a path, refer to the ETERNUS Multipath Driver manuals
and follow the direction given in the manuals.
When not using the ETERNUS Multipath Driver, use the path management tool and check
the path status that each software provides, and handle the problem if necessary.
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