Service manual

Chapter 5 Troubleshooting
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2. If you installed more than one SCSI controller, make sure that the BIOS for all controllers except
for the boot controller are disabled. This lets the SCSI BIOS for the boot controller load.
3. Determine what the boot device priority is for the HP NetServer model. Verify that the boot
device is set to the correct priority.
The SCSI subsystem does not work at installation.
Many SCSI problems are caused by an incorrect configuration rather than by faulty hardware. If the SCSI
subsystem does not work after installation, do the following:
1. Review the Troubleshooting Checklist and "Mass Storage Guidelines" section in Chapter 2
before you continue.
2. Run the DiagTools and verify the integrity of the SCSI buses, and other switch settings on the
external storage devices are correct. Verify that each SCSI device is assigned a unique SCSI
ID.
3. If you don't see the SCSI BIOS banner during system start:
"Symbios, Inc. SDMS TM V4.0 PCI SCSI BIOS PCI Rev. 2.0, 2.1"
"Copyright 1995, 1998 Symbios, Inc."
"PCI-4.14.04"
and the final message "SCSI BIOS successfully installed" after devices are displayed:
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◊ Check the cable connections.
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◊ Check the SCSI termination.
4. Run the Setup Utility or SCSI Configuration Utility and verify that the SCSI host bus adapter
(HBA) is properly configured.
The HBA is usually SCSI ID 7.
5. If you installed more than one SCSI adapter, verify that each adapter is set to a separate BIOS
address; or disable the BIOS on all of the adapters except one.
6. For each device, check:
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◊ That each device has a unique SCSI address.
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◊ In general, when selecting an address for a drive (default address is 0), select the lowest
possible address.
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◊ Check that the device's jumpers are set according to the device documentation.
7. Check that the primary SCSI hard disk drive is set to the lowest address (usually set to 0). Each
device (the HBA is also a device) must have a unique and separate SCSI ID number. To solve
this problem, simply set the device ID to something other than that of the HBAs SCSI ID (7). If
the device is a boot drive, then the SCSI ID should be set at 0.
8. Go into the SCSI Configuration Utility and set the transfer rate lower. The internal and external
SCSI subsystems are typically LVD and will be set to default at the maximum 80 MB/sec. If the
SCSI system works at lower transfer rate, you may infer a connector problem. Try cleaning and
reseating the SCSI cable. Try another cable.
To change the transfer rate for a SCSI device:
a. Press [CTRL] and [C] keys when prompted to enter the SCSI utility.
b. Select the either the internal or external SCSI controller. The internal SCSI channel is
usually port 2000. Press [Enter].