HP EML E-series Tape Libraries - Manual (Page 78)

Each of these topics is discussed in the following sections.
Examining FC port connection
Most hubs and switches have link indicators showing link status. When the interface controller is
connected and powered on, the link indicator appears solid. If it is not, examine the cabling or
connections.
To examine links:
• Make sure that the library is not running any tasks before disconnecting any cables. Disconnect
and reconnect the FC cable. This procedure causes momentary activity of this indicator as
the link reinitializes.
• Make sure that the cable type for the interface controller and the attached hub, HBA, or switch
are similar.
NOTE:
By default, the FC port speed is set to 2 Gbps for the e2400-FC 2Gb interface controller and to 4
Gbps for the e2400-FC 4Gb interface controller. Changes to the FC port speed must be manually
set, such as for 1 Gbps. If set incorrectly and the interface controller is plugged into a Loop or Fabric,
the unit can receive framing errors, which can be found in the trace logs; the fiber link light will
be off because of the incorrect FC link speed.
Examining the interface controller configuration
To examine the interface controller configuration, make sure that:
• The interface controller speed is set correctly.
• The connection type is set correctly.
• The host is added to Secure Manager in Command View TL and given permission to communicate
with the library.
Examining devices
HP recommends using Command View TL to make sure that the devices are operating correctly.
Examining the host configuration
In some cases, the FC HBA or host device driver may not be working properly. Check the configuration of
these elements.
Check the release notes for the device driver to see if there are any specific issues or a required
configuration. Also, make sure that you are using the current version of the HBA driver.
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 in a direct-attach configuration, configure the interface controller to use
hard addressing and set the AL_PA to a value that the HBA can map, with an ID less than 16.
Examining HBA device driver information
Review the HBA device driver Readme.txt file for configuration specifics. An HBA may require a
different configuration. HBAs typically come with utility programs to view or change their configurations.
Examining serial port configuration
If you have problems connecting to the serial interface, make sure that the configuration of the terminal or
terminal emulation program is correct.
78 Maintaining the library