IBM DS3500

Table 9. Troubleshooting (continued)
Problem
indicator Component Possible cause Possible solutions
Green LED is
flashing slowly
(once every 2
seconds)
Drives The DS3500 was
not powered-on, or
all SAS connections
between the
expansion
enclosures and the
DS3500 storage
subsystem have
failed.
Perform one of the following
actions:
v Power-on the storage
subsystem.
v Make sure that the SAS
connections between the
expansion enclosures and the
DS3500 storage subsystem
are made.
v Make sure that all the
expansion enclosures in the
same channel pair have the
same enclosure speed setting.
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 supplies 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 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.
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 DS3500. Contact
your IBM technical-support
representative.
Chapter 6. Solving problems 131