HP STORAGEWORKS e1200-160 User Manual download pdf (Page 155)

Basic Troubleshooting

155Network 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.

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HP STORAGEWORKS e1200-160 User Manual Page 155