Lenovo ThinkSystem SR650 Maintenance Manual

Also see for ThinkSystem SR650: Manual Manual Quick start guide Product guide Setup guide

Contents

• Memory mirrored channel does not account for the discrepancy.• The memory modules are seated correctly.• You have installed the correct type of memory.• If you changed the memory, you updated the memory configuration in the Setup utility.• All banks of memory are enabled. The server might have automatically disabled a memory bank whenit detected a problem, or a memory bank might have been manually disabled.• There is no memory mismatch when the server is at the minimum memory configuration.2. Reseat the DIMMs, and then restart the server.3. Run memory diagnostics. When you start a server and press F1, the Lenovo XClarity ProvisioningManager interface is displayed by default. You can perform memory diagnostics from this interface.From the Diagnostic page, click Run Diagnostic ➙ Memory test.4. Check the POST error log:• If a DIMM was disabled by a systems-management interrupt (SMI), replace the DIMM.• If a DIMM was disabled by the user or by POST, reseat the DIMM; then, run the Setup utility andenable the DIMM.5. Reseat the DIMM.6. Restart the server.Multiple rows of DIMMs in a branch identified as failing1. Reseat the DIMMs; then, restart the server.2. Remove the lowest-numbered DIMM pair of those that are identified and replace it with an identicalknown good DIMM; then, restart the server. Repeat as necessary. If the failures continue after allidentified DIMMs are replaced, go to step 4.3. Return the removed DIMMs, one at a time, to their original connectors, restarting the server after eachDIMM, until a DIMM fails. Replace each failing DIMM with an identical known good DIMM, restarting theserver after each DIMM replacement. Repeat step 3 until you have tested all removed DIMMs.4. Replace the lowest-numbered DIMM of those identified; then, restart the server. Repeat as necessary.5. Reverse the DIMMs between the channels (of the same processor), and then restart the server. If theproblem is related to a DIMM, replace the failing DIMM.6. (Trained technician only) Replace the system board.Hard disk drive problemsUse this information to resolve issues related to the hard disk drives.• “Server cannot recognize a hard drive” on page 211• “Multiple hard drives fail” on page 212• “Multiple hard drives are offline” on page 212• “A replacement hard disk drive does not rebuild” on page 213• “Green hard disk drive activity LED does not represent actual state of associated drive” on page 213• “Yellow hard disk drive status LED does not represent actual state of associated drive” on page 213Server cannot recognize a hard driveComplete the following steps until the problem is solved.1. Observe the associated yellow hard disk drive status LED. If the LED is lit, it indicates a drive fault.Chapter 4. Problem determination 211