Chapter 5. Solving Problems - IBM System Storage EXP2512 Express Storage Enclosure Installation, User's, And Maintenance Manual

Chapter 5. Solving problems

The following table contains troubleshooting information to help you solve some
basic problems that you might have with the EXP2500.
Table 6. Troubleshooting information
Component Problem indicator
Hard disk drive Amber fault LED lit
ESM
Front panel
All components All green LEDs off
Hard disk drives Amber fault LED
flashing
Power supply Amber fault LED lit;
green dc power LED
off
Power supply Amber fault LED lit;
green ac power LED
off
Front panel Amber
overtemperature LED
lit
ESM SAS link LED off
© Copyright IBM Corp. 2010, 2011
Possible cause Possible solutions
Drive failure Replace the failed hard disk drive. See "Replacing a
hot-swap hard disk drive" on page 30.
Board failure Replace the failed ESM. See "Replacing an ESM"
on page 35.
General machine A status or fault LED somewhere on the EXP2500
fault is lit. Check for amber LEDs on components. See
Chapter 3, "EXP2500 controls, LEDs, and power,"
on page 17.
The EXP2500 is Make sure that all EXP2500 power cables are
turned off connected and that the power is on. If applicable,
make sure that the main circuit breakers for the rack
are turned on.
ac or dc power Check the main circuit breaker and ac or dc outlet.
failure
Power-supply Replace the power supply. See "Replacing a
failure hot-swap power supply" on page 36.
Midplane failure Have the EXP2500 serviced.
Drive rebuild or No action is required.
identity in process
Power supply
1. Install four or more hard disk drives, turn off the
failure; power
power, and turn it on again.
supply turned off;
2. If the power-supply switch is on, turn off the
minimum hard disk
power supply and then turn it on again. If the
drives not installed
condition remains, replace the power supply.
See "Replacing a hot-swap power supply" on
page 36.
No ac power to Check the ac power cord or breaker.
power supply
v If ac power is good at the source, replace the
power cord.
v If the power supply has failed, replace the power
supply. See "Replacing a hot-swap power supply"
on page 36.
Filler panel missing Make sure that the ESM filler panel is installed in
the correct ESM bay.
Environment Turn off the system until the environment
temperature returns to within the defined operating
temperature range.
Fan failure Replace the power supply with the failed fans.
SAS
1. Reconnect the SAS cable.
communication
2. Replace the SAS cable.
failure
3. If the LED is still off, replace the ESM or the
device into which the other end of the SAS
cable is connected.
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