IBM DS3500, Installation, User'S, And Maintenance Manual

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Solving problems in the EXP3500 storage enclosure
The following table contains troubleshooting information to help you solve some basic problems that you
might have with the EXP3500 storage enclosure.
Table 6-2. Troubleshooting information
Component Problem indicator Possible cause Possible solutions
Drive Amber fault LED lit Drive failure Replace the failed drive. See Chapter 5, “Replacing
components,” on page 5-1 for more information.
ESM Board failure Replace the failed ESM. See Chapter 5, “Replacing
components,” on page 5-1 for more information.
Front panel General machine
fault A status or fault LED is lit. Check for amber LEDs
on components. See “Checking the LEDs” on page
4-7.
All components All green LEDs off The EXP3500 is
turned off Make sure that all power cables are 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
failure Check the main circuit breaker and ac outlet (ac
models). Check the -48 V dc power source and
disconnect device (dc models).
Power-supply
failure Replace the power supply. See Chapter 5,
“Replacing components,” on page 5-1 for more
information.
Midplane failure Contact your IBM technical-support representative.
Drives Amber fault LED
flashing Drive rebuild or
identity in process No action is required.
Power supply -
ac Amber fault LED lit;
green dc power LED
off Power supply
failure; power
supply turned off If the power-supply switch is on, turn off the
power supply and then turn it on again. If the
condition remains, replace the power supply.
Power supply -
ac Amber fault LED lit;
green ac power LED
off No ac power to
power supply Check the ac power cord or breaker.
v
If ac power is good at the source, replace the
power cord.
v
If the power supply has failed, replace the power
supply.
Power supply -
dc Amber fault LED lit;
green dc power out
LED off Power supply
failure; power
supply turned off If the power-supply switch is on, turn off the
power supply and then turn it on again. If the
condition remains, replace the power supply.
Power supply -
dc Amber fault LED lit;
green dc power in
LED off No -48 V dc power
to power supply Check the dc power cable or disconnect device.
v
If dc power is good at the source, replace the dc
power cable or the 20 A disconnect device.
v If the dc power cable and the disconnect device
are working properly, replace the power supply.
ESM Link fault amber LED
lit SAS
communication
failure
1. Reconnect the SAS cable.
2. Replace the SAS cable.
3.
If the LED is still lit, replace either the ESM or
the controller or device into which the other end
of the SAS cable is connected.
6-6
System Storage DS3500 and EXP3500: Installation, User's, and Maintenance Guide