Fujitsu Eternus DX80 S2 User Manual page 87

Chapter 7 Troubleshooting
7.1 Check List
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When the license key cannot be registered
A wrong serial number may have been input when issuing the license key. If the problem per-
sists, contact your sales representatives.
When issuing the license key again, make sure to check that the [Serial number] (ETERNUS DX
Disk storage system serial number) that is described in the notification e-mail is correct.
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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 drive performance may be reduced.
• Click the icon of each part on the [Storage] screen of [Component] 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 status of the controller.
When a power failure occurs while the controller has failed, the data in the cache memory is
directly written to the drives. This causes temporary performance degradation.
When the controller fails, 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 or for other reasons, review the configuration and
settings.
• 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 "ETERNUS DX Disk storage systems
User's Guide -Server Connection-".
ETERNUS DX80 S2/DX90 S2 Disk storage system User's Guide -Operation-
Check whether the ETERNUS DX Disk storage system can connect to each ser-
vice.
If it cannot connect, contact your maintenance engineer.
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.
Copyright 2011 FUJITSU LIMITED
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