Troubleshooting problems in the DCS3700 storage subsystem
Table 21. Troubleshooting
Problem indicator Component Possible cause Possible solutions
Amber LED is lit
Drive (drive fault
LED)
Drive failure Replace the failed drive. See “Replacing
components” on page 89 for more
information.
Drive uncertified Verify the drive and part number to make
sure that it is supported by the DCS3700.
See http://www.ibm.com/systems/
storage/disk
storage controller
(service action
required LED)
controller failure Replace the controller. See “Replacing
components” on page 89 for more
information.
The controller was placed
offline by a user or the
other controller.
Use the Subsystem Management window
to place the controller back online. If the
controller continues going to an offline
state after being placed online, replace the
controller.
storage controller
(battery fault LED)
Battery unit failure Use the Storage Manager software to
confirm the failure; then, replace the failed
battery unit.
storage controller
(SAS link service
action LED)
SAS cable failure Replace the SAS cable.
SAS host bus adapter
failure
Check the SAS host bus adapter in the
host and replace the adapter if necessary.
SAS port failure Replace the controller. See “Replacing
components” on page 89 for more
information.
Front bezel
(system error LED)
General machine fault
A fault LED is lit somewhere on the
storage subsystem (check for amber LEDs
on components).
General machine fault
(continued)
Open the Subsystem Management window
and click Recovery Guru to see problems
in the DCS3700 configuration.
Some errors cause the system error LED to
be lit but not cause any individual
component fault LEDs to be lit. (Drive
PFA exceeded or nominal temperature
exceeded errors are examples.) Follow the
corrective actions in the Recovery Guru
window.
130 IBM System Storage DCS3700: Installation, User, and Maintenance Guide
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