Table 5. Troubleshooting (continued)
Problem
indicator Component Possible cause Possible solutions
Intermittent or
sporadic power
loss to the storage
subsystem
Some or all
components
Defective ac power
source or incorrectly
connected power
cable
Check the ac power source.
Reseat all installed power cords
and power supplies. If applicable,
check the power components
(power-supply units or
uninterruptible power supply).
Replace defective power cords.
Power-supply failure Check the fault LED on the
power supply. If the LED is lit,
replace the failed component.
Midplane failure Replace the DS3300. 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.
RAID controller
failure
Replace one or both RAID
controllers. Contact an IBM
technical-support representative.
Drive failure Replace the failed drive or drives.
Random errors Subsystem Midplane failure Replace the DS3300. Contact
your IBM technical-support
representative.
Hard disk 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.
RAID controller
failure
Replace RAID controller.
Midplane failure Replace the DS3300. Contact
your IBM technical-support
representative.
A drive has an
interface problem
with the ESM or
controller.
Replace the drive.
Incorrect firmware
version
Make sure that the DS3300 has
the correct firmware version. See
“Software and hardware
compatibility and upgrades” on
page 11.
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.
Chapter 6. Solving problems 99
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