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• If LSI MegaRAID <ServeRAID M5110e> Configuration Utility - xx.xx.xx is not displayed, check
the connection of the interposer cable to the connector on the compute node system board. Then,
check the Setup utility again to determine whether the compute node now detects the presence of
the storage expansion node.
3. If you are using a Windows operating system, open Device Manager.
4. Make sure that ... Flex System Storage Expansion Node is displayed under Storage controllers. If it
is not, install the RAID controller device driver. For instructions, see "Configuring the RAID controller"
on page 15.
5. If the problem remains, contact Product Support.
Light path diagnostics
Light path diagnostics is a system of LEDs on the system board of the storage expansion node and on
various internal components of the compute node. When an error occurs, LEDs can be lit in the storage
expansion node and throughout the compute node to help identify the source of the error.
The following illustration shows the light path diagnostics LEDs and the light path button on the system board.
To view the light path diagnostics LEDs on the storage expansion node system board, complete the
following steps:
1. Remove the storage expansion node assembly from the chassis (see "Removing the storage expansion
node assembly from the Flex System Enterprise Chassis" on page 17 for instructions).
2. Remove the cover from the storage expansion node (see "Removing the cover from the storage
expansion node" on page 8 for instructions).
Attention: Make sure that the drive drawer is supported when it is open. The weight of installed drives
can cause the storage expansion node assembly to be unstable when the drive drawer is open.
3. Open the drive drawer approximately 35 cm (14 in.). The LEDs are visible below the segmented cable
track.
4. Press the light path button to illuminate any LEDs that are activated.
22
Flex System Storage Expansion Node Installation and Service Guide
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