Chapter 4. Solving Problems; Troubleshooting - IBM Netfinity EXP300 Installation And User Manual

Chapter 4. Solving problems

Troubleshooting

Problem indicator Component
Amber LED on Drive CRU
ESM board
Front panel
Amber LED on and Power-supply
green LED off CRUs
Amber and green Power-supply
LEDs on CRUs
All green LEDs off All CRUs
Amber LED Drive CRUs
flashing
Power supply
CRU
© Copyright IBM Corp. 2000
This chapter contains information to help you solve some of the simpler problems you
might have with your expansion unit. It contains the problem symptoms and error
messages along with suggested actions to take to resolve the problem.
This chapter also provides instructions on how to obtain service and technical
assistance for your expansion unit and other IBM products that you might plan to use.
You can use these charts to find solutions to problems that have definite symptoms.
Possible cause
Drive failure
Board failure
General
machine fault
Power is turned
off
Power supply
failure
The expansion
unit is turned off
AC power
failure
Power supply
failed
Midplane failure Have the expansion unit serviced.
Drive rebuild or
identity is in
process
Fan failure
Possible solutions
Replace the failed drive. Refer to "Replacing
hot-swap drives" on page 28.
Replace failed board. Refer to "Replacing an
ESM board" on page 31.
Indicates that a Fault LED somewhere on the
expansion unit has been turned on. Check for
amber LEDs and CRUs, Refer to "Rear controls,
indicators, and connectors" on page 6.
Turn on all power supplies. Refer to "Rear
controls, indicators, and connectors" on page 6.
Replace the failed power supply CRU. Refer to
"Replacing an ESM board" on page 31.
Check that all expansion unit power cables are
plugged in and the power is on. If applicable,
check that the main circuit breakers for the rack
are turned on.
If the external switch 1 is set to Off, the SCSI
controller must be cabled to the EXP300 and
turned on.
Check the main circuit breaker and ac outlet.
Replace the power supply CRU. Refer to
"Removing a hot-swap power supply/fan unit"
on page 33.
No corrective action is needed.
Replace the power supply CRU.
35