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

Page: 161 / 193

Table 6-1. Troubleshooting (continued)
Problem indicator Component Possible cause Possible solutions
Intermittent or sporadic
power loss to the
storage subsystem Some or all
components Defective power source
or incorrectly connected
power cable Check the ac or dc power source. Reseat
all installed power cables and power
supplies. If applicable, check the power
components (power supplies or
uninterruptible power supply). Replace
defective power cables.
Power supply failure Check the fault LED on the power supply.
If the LED is lit, replace the failed
component.
Faulty disconnect device Check and install a new 20 A rated
disconnect device.
Midplane failure Replace the DS3500. Contact your IBM
technical-support representative.
Unable to access drives Drives Incorrect storage
subsystem ID settings Make sure that the SAS cables are
undamaged and correctly connected.
Check the storage subsystem ID settings.
controller failure Replace one or both controllers. Contact an
IBM technical-support representative.
Drive failure Replace the failed drive or drives.
Random errors Subsystem Midplane failure Replace the DS3500. Contact your IBM
technical-support representative.
drive is not visible in
the Storage Manager
software Several components Drive failure Replace the failed drive or drives.
SAS cable failed Replace the SAS cable.
controller failure Replace controller. See Chapter 5,
“Replacing components,” on page 5-1 for
more information.
Midplane failure Replace the DS3500. Contact your IBM
technical-support representative.
A drive has an interface
problem with the ESM or
controller. Replace the drive. See Chapter 5,
“Replacing components,” on page 5-1 for
more information.
Incorrect firmware
version Make sure that the DS3500 has the correct
firmware version. See “Software and
hardware compatibility and upgrades” on
page 1-14.
In a dual-controller
storage subsystem, one
controller has failed, and
in the drive channel that
originates from the other
(functioning) controller,
an ESM has failed. Replace the failed controller and ESM. See
Chapter 5, “Replacing components,” on
page 5-1 for more information.
Storage enclosure is not
detected Storage subsystem storage enclosure is not
supported Verify that the storage enclosure is
supported by the DS3500 storage
subsystem.
SAS cable failed Replace the SAS cable.
Chapter 6. Solving problems
6-5