IBM DS3500 Installation, User's, And Maintenance Manual page 184

Table 16. Troubleshooting (continued)
Problem indicator Component
Intermittent or
sporadic power
loss to the storage
subsystem
Unable to access
drives
Random errors
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IBM System Storage DS3500 and EXP3500 Storage Subsystem: Installation, User's, and Maintenance Guide
Possible cause
Some or all Defective power
components source or
incorrectly
connected power
cable
Power supply
failure
Faulty disconnect
device
Midplane failure
Drives Incorrect storage
subsystem ID
settings
controller failure
Drive failure
Subsystem Midplane failure
Possible solutions
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.
Check the fault LED on the
power supply. If the LED is lit,
replace the failed component.
Check and install a new 20 A
rated disconnect device.
Replace the DS3500. Contact
your IBM technical-support
representative.
Ensure that the SAS cables are
undamaged and correctly
connected. Check the storage
subsystem ID settings.
Replace one or both controllers.
Contact an IBM technical-support
representative.
Replace the failed drive or
drives.
Replace the DS3500. Contact
your IBM technical-support
representative.