Chapter 5 | Troubleshooting |
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."
and the final message "SCSI BIOS successfully installed" after devices are displayed:
◊Check the cable connections.
◊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:
◊That each device has a unique SCSI address.
◊In general, when selecting an address for a drive (default address is 0), select the lowest possible address.
◊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].
c. After the utility scans the channel, it will list SCSI devices detected. You may change the transfer rate for a specific device by selecting it, or for the entire channel by changing the controller. Make your selection and press [Enter].
d. Press [Enter] on Sync Rate to select a new transfer rate.
e. Follow the prompts to save the new setting and exit the utility.
9.If another hard disk drive is connected to the SCSI bus, check it for unique address, SCSI cable connection, and power connection.
10.Check the SCSI bus cable for correct orientation, alignment, and seating on the SCSI adapter and the SCSI device.
11.Check for the correct
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