Appendix B. Solving Problems - IBM OPTIONS SCSI Manual Del Usuario

Appendix B. Solving problems

Using the information in this section, you might be able to solve the problem
yourself or gather information that you can pass to the technical support
representative when you make your call.
Your computer or hard disk drive does not operate correctly.
v Check the drive to ensure that all power and signal cables are securely
attached.
v Check the SCSI ID jumper setting. No two SCSI devices can have the same
SCSI ID. This includes the SCSI adapter.
v Be sure that the last device or cable terminator terminates the SCSI cable.
There must be a terminator or a terminating device at the end of the SCSI
cable. You must terminate both internal and external SCSI cables. Remove
any terminators on devices that are not on the end of the cable.
v If you are installing the drive in an IBM server, be sure that Auto Start is not
active.
v Turn off all attached devices before turning off the computer. Unplug the
computer power cord. Remove the drive. Check for bent or misaligned pins.
If there are no problems, reinstall the drive.
Your computer does not configure the hard disk drive correctly.
v Most configuration problems are caused by incorrect termination or incorrect
SCSI ID configuration. If multiple SCSI devices are attached, disconnect all
other SCSI devices on the chain. Assign the highest priority SCSI ID
available (SCSI ID 6) to the drive, and then terminate the drive. Try to detect
the drive using your SCSI adapter utility program.
v If you have just installed a SCSI adapter and you are now installing the SCSI
hard disk drive, your SCSI adapter must be correctly configured before you
can activate the drive. To configure your adapter, you might need to know
the available I/O addresses, IRQs, and ROM addresses. If you are unable to
configure your adapter, you will not be able to use your SCSI device. If you
need more information about configuring your adapter, see the
documentation that comes with your computer or SCSI adapter.
v Termination power must be applied to the SCSI device chain. This is not the
same as signal termination. If your adapter does not supply termination
power, power must be supplied by a device on the SCSI device chain.
Multiple devices can supply termination power to the SCSI device chain, but
only one device can terminate the chain.
v Use the following cable length guidelines for attaching your new SCSI drive
to an existing Ultra SCSI device chain.
– SCSI-2 and Ultra SCSI device cables cannot 3 m (9 ft 10 in.).
© Copyright IBM Corp. 2001
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