Chapter 5: Troubleshooting
Fault Isolation Methodology
QX and QXS Setup Guide 131
l Informational. A configuration or state change occurred, or a problem occurred that the system
corrected. No immediate action is required.
See the QXS Storage Service Guide, which is available at www.quantum.com, for information about
specific events.
It is very important to review the logs, not only to identify the fault, but also to search for events that might
have caused the fault to occur. For example, a host could lose connectivity to a vdisk if a user changes
channel settings without taking the storage resources assigned to it into consideration. In addition, the type
of fault can help you isolate the problem to either hardware or software.
Isolate the Fault
Occasionally, it might become necessary to isolate a fault. This is particularly true with data paths, due to the
number of components comprising the data path. For example, if a host-side data error occurs, it could be
caused by any of the components in the data path: controller module, cable, or data host.
If the Chassis Does Not Initialize
It may take up to two minutes for all chassis to initialize. If an chassis does not initialize:
l Perform a rescan.
l Power cycle the system.
l Make sure the power cord is properly connected, and check the power source to which it is connected.
l Check all cable connections from RAID chassis and expansion chassis.
l Check the event log for errors.
Correcting Chassis IDs
When installing a system with expansion chassis attached, the chassis IDs might not agree with the physical
cabling order. This is because the controller might have been previously attached to chassis in a different
configuration, and it attempts to preserve the previous chassis IDs if possible. To correct this condition,
make sure that both controllers are up, and perform a rescan using the Disk Storage Management Utility or
the CLI. This will reorder the chassis IDs, but can take up to two minutes for the chassis IDs to be corrected.
Rescan Using CLI
To perform a rescan using the CLI, type the following command:
rescan
Rescan Using Disk Storage Management Utility (V2)
To rescan using the Disk Storage Management Utility (V2):
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