Service manual

Chapter 5 Troubleshooting
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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 Hewlett-Packard internal and external SCSI cables.
12. Check that all SCSI devices are connected to power and power-on all SCSI devices before or at
the same time as the HP NetServer to ensure a stable SCSI bus.
13. Watch the boot screen for all SCSI devices to be displayed. For example, in a system with 1
SCSI controller and 2 hard disk drives (one with ID 0 and one with ID 1), if a valid device is
found at device address 0, but not at address 1, you would see these device validation lines on
the boot screen:
Channel x, SCSI ID #n - id info - Drive C: (80h)
If you see this message:
a. Verify that the SCSI hard disk drive is set to address 1.
b. Check the SCSI bus cable for correct orientation, alignment, and seating on the host adapter
and the hard disk drive.
c. Verify that terminators are installed at each end of the SCSI bus, but not on any other
devices. The hot swap cage printed circuit board has automatic termination that disconnects
when a cable is attached.
d. Verify that all SCSI devices on the bus are appropriate for that bus (only single-ended SCSI
devices on the single-ended bus, only differential SCSI devices on the differential bus).
14. If the server still fails to recognize the SCSI drive, disconnect all SCSI devices except the host
adapter and the drive at SCSI address 0 and try again. If the system fails, try substituting a
known good hard disk drive.
15. If the SCSI BIOS has properly identified device 0 and has installed it as drive C, but cannot find
a device at address 1, and in addition, if no further messages are displayed, it indicates the
server cannot load the operating system from device 0, check the following:
a. If a second hard disk drive is connected to the SCSI bus, check it for proper address
selection, SCSI cable connection, and proper power.
b. Check the disk partition.
c. Partition the hard disk drive if required.
16. Use only SCSI devices without built-in terminators.
The HP NetServer embedded controllers are terminated automatically on the hot swap cage or
at the end of the SCSI cable. If you are installing a SCSI device that uses a built-in terminator,
you must remove the terminator from the device before proceeding with the installation.
Use only the HP NetServer SCSI cables for the SCSI hot swap subsystem.
17. Check that all SCSI devices LVD (low voltage differential) SCSI and that no SE (single-ended)
SCSI devices have been added to the bus.
Hot-swap drives shipped by HP are set for LVD operation. Drives set for SE operation may