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Chapter 4. Troubleshooting
Use this information to diagnose and fix any problems that might occur in the storage expansion node.
If the check log LED on the compute node is lit, check the integrated management module II (IMM2) and
Chassis Management Module (CMM) event logs. For instructions, see the troubleshooting information in
the compute node Installation and Service Guide.
If the compute node fails to recognize or connect to the storage expansion node, follow the procedures in
"Connection failure" on page 21.
Event messages
Hardware events in the storage expansion node are detected by the integrated management module II
(IMM2) in the compute node that is connected to the storage expansion node assembly.
The IMM2 logs storage expansion node events in the system-event log in the compute node. In addition,
the IMM2 sends that event to the Chassis Management Module (CMM) and to the Flex System Manager
management node, if one is installed.
For instructions, see the troubleshooting information in the compute node Installation and Service Guide.
Connection failure
Use this procedure if the compute node fails to recognize or connect to the storage expansion node.
Check for the following general requirements:
• Make sure that the compute node has two installed microprocessors, if that configuration is required for
the compute node to work with the storage expansion node. To determine whether a supported compute
node requires two microprocessors, see "Supported compute nodes" on page 2.
• Make sure that the integrated management module II (IMM2) primary and backup firmware is at level
ibm_fw_imm2_1aoo34x-1.xx_anyos_noarch or later.
Attention: If the IMM2 firmware in the compute node is at an earlier level when you connect the compute
node to the storage expansion node, the firmware in the storage expansion node will become corrupted
and unrecoverable, and you will have to replace the storage expansion node.
• If an optional flash/RAID adapter has been installed and operating in the storage expansion node, make
sure that the adapter is currently installed. If a previously installed flash/RAID adapter has been removed,
reinstall or replace the adapter. If you choose to operate the storage expansion node without a flash/RAID
adapter, contact IBM Hardware Support to reset the LSI SAS MegaRAID firmware to its defaults, or
replace the storage expansion node.
If those requirements are met and the compute node still fails to recognize or connect to the storage
expansion node, complete the following steps:
1. On the compute node, start the Setup utility (see the compute node Installation and Service Guide
for instructions).
2. Select System Settings > Storage.
• If LSI MegaRAID <ServeRAID M5110e> Configuration Utility - xx.xx.xx is displayed, the compute
node detects the presence of the storage expansion node. Continue to step 3 "" on page 22.
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