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Basic Troubleshooting
153Network Storage Router N1200 User Guide
■ If no devices are listed, verify the router configuration, SCSI Controller
configuration, and cabling.
Verifying the Router Configuration
If you are in doubt about the configuration or about the location of the error,
restore the router to the factory default configuration and proceed to configure the
unit one step at a time, verifying the functionality of the configuration after each
change is made.
Caution: Restoring factory defaults overwrites user configurations. In the
serial/ Telnet interface, use the save configuration option before resetting
factory defaults to allow recovery of user configuration.
Verifying Mapping
If the router is working in Fibre Channel-to-SCSI Initiator mode and is using
Indexed or SCC mapping, try changing to Auto-assigned mapping.
Verifying Devices
It may be useful to connect the SCSI target devices directly to a SCSI interface
(for example, a host SCSI bus) to verify that the devices are functional.
Verifying the Host Configuration
In some cases, it may be that the Fibre Channel HBA or host device driver may
not be working properly. Check the configuration of these elements.
It may be useful to check the release notes for the device driver to see if there are
any specific issues or required configuration. It may also be useful to ensure that
the current version of the HBA driver is being used.
There are cases where older applications can have expectations about what
constitutes a valid SCSI ID, and thus may not correctly handle certain mappings.
This is not an issue for the operating system or most applications. However, some
applications may exhibit difficulties addressing target IDs greater than 15 (16 and
higher.) To resolve this situation, configure the router to use hard addressing and
set the AL_PA to a value that the HBA will be able to map with an ID less than
16.