HP STORAGEWORKS E1200-160 - Manual (Page 155)

Basic Troubleshooting
155 Network Storage Router e1200-160
Basic Troubleshooting
If possible, simplify the installation by reducing it to the most basic configuration.
Then, add elements one at a time, verifying the operation after each step.
Basic troubleshooting includes verifying the setup and the connections, including:
■ Verifying SCSI bus configuration
■ Verifying Fibre Channel port connection
■ Verifying SCSI devices in Windows NT
■ Verifying the router configuration
■ Verifying mapping
■ Verifying devices
■ Verifying host configuration
■ Verifying HBS device driver information
■ Verifying serial port configuration
■ Verifying PRLI data
Each of these topics is discussed in the following sections.
Verifying SCSI Bus Configuration
Items to check include:
■ Termination — Problems with termination can cause intermittent or hard
failures. A SCSI bus must be terminated on both ends. Termination problems
are common when both narrow and wide devices are on the same bus.
■ Bus Type — On an LVD SCSI bus, SE and LVD devices can be connected to
the same bus. However, if one SE device is detected during power up,
communication to all devices will convert to SE mode.
■ Device ID — Each device on a SCSI bus must have a unique ID. Verify
configured IDs are not in use by other devices on the same SCSI bus.
■ Cabling — Check SCSI cables to verify they are functional. SCSI rules for
total length, distance between devices, and stub length must be followed.
Connections should also be checked and reseated if necessary.
■ SCSI Devices — Verify that the SCSI devices on a particular SCSI bus can
be seen in the Configuration Menu of the router. If the router cannot see the
devices, verify SCSI configuration, cabling, and termination.