Siemens PSFR-CP41 - Manual (Page 57)

Operating Manual U42093-J-Z716-1-74
Basic Verification Troubleshooting
Basic Verification
Verify SCSI Bus Configuration
Problems with SCSI bus configuration are common. Basic operation of the SCSI
bus can be checked by using the configuration menu to view attached SCSI
devices. See Chapter “Configuring the PSFR-CP41” for more information.
Other conditions to look for include:
Termination – Problems with termination can cause intermittent or hard
failure. The SCSI bus must be terminated on both ends, and only both ends.
Termination issues when both narrow and wide devices are on the same bus
are common.
Bus Type – Single-Ended devices cannot be mixed with Differential devices
on the same bus. Similarly, Single-Ended terminators cannot be used on
Differential buses, and Differential terminators cannot be used on a Single-
Ended bus.
Device ID – Each device on a SCSI bus must have a unique ID. Also check
the configured ID’s for the PSFR-CP41 to verify these 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 adhered to.
Connections should also be checked and reseated if necessary.
SCSI Devices – Verify SCSI devices can be seen in the configuration menu
of the PSFR-CP41. Select ”Perform Configuration” from the first menu.
Then select ”Fibre Channel to SCSI Mapping Configuration.” SCSI devices
should be listed. If the PSFR-CP41 can not see the devices, verify SCSI
configuration and cabling.