Basic Troubleshooting; Verifying Scsi Bus Configuration; Troubleshooting - HP StorageWorks N1200 User Manual

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:
Each of these topics is discussed in the following sections.

Verifying SCSI Bus Configuration

Items to check include:
Network Storage Router N1200 User Guide
Verifying SCSI Bus
Verifying Fibre Channel Port
Verifying SCSI Devices in Windows
Verifying the Router
Verifying Mapping, page 153
Verifying Devices, page 153
Verifying the Host Configuration
Verifying HBA Device Driver
Verifying Serial Port
Verifying PRLI Data, page 155
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.
Configuration, page 151
Connection, page 152
NT, page 152
Configuration, page 153
, page 153
Information, page 154
Configuration, page 154
Basic Troubleshooting
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