Green LED is flashing
slowly (once every 2
seconds)
Drives The DCS3700 was not
powered-on, or all SAS
connections between the
storage enclosures and
the DCS3700 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 storage enclosures and the
DCS3700 storage subsystem are made.
v Make sure that all the storage
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 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 30A rated
disconnect device.
Midplane failure Replace the DCS3700. 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.
SAS cable
1. Make sure that the SAS cables are
undamaged and correctly connected.
2. Replace the SAS cables.
ESM failure Contact your IBM technical support
representative.
Random errors Subsystem Midplane failure Replace the DCS3700. Contact your IBM
technical-support representative.
134 IBM System Storage DCS3700: Installation, User, and Maintenance Guide
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