Hard disk drive problemsThis topic provides a list of suggested actions for problems with the hard diskdrive.About this taskv Follow the suggested actions in the order in which they are listed in the Action column until the problem issolved.v See Chapter 4, “Parts listing, Types 7145, 7146, 7143, and 7191,” on page 81 to determine which components arecustomer replaceable units (CRU) and which components are field replaceable units (FRU).v If an action step is preceded by “(Trained service technician only),” that step must be performed only by atrained service technician.Symptom ActionNot all drives are recognized bythe DSA hard disk drivediagnostic test.Remove the drive that is indicated by DSA (see “Removing a hot-swap hard diskdrive” on page 117); then, run the hard disk drive diagnostic test again (see “IBMDynamic System Analysis” on page 71). If the remaining drives are recognized,replace the drive that you removed with a new one.The server stops respondingduring the hard disk drivediagnostic test.Remove the hard disk drive that was being tested when the server stoppedresponding (see “Removing a hot-swap hard disk drive” on page 117), and runthe diagnostic test again (see “IBM Dynamic System Analysis” on page 71). If thehard disk drive diagnostic test runs successfully, replace the drive that youremoved with a new one (see “Replacing a hot-swap hard disk drive” on page118).A hard disk drive was notdetected while the operatingsystem was being started.Reseat all hard disk drives and cables; then, run the DSA hard disk drivediagnostic test again (see “IBM Dynamic System Analysis” on page 71).A hard disk drive passes theDSA hard disk drive diagnostictest but the problem remains.Run the diagnostic SAS Fixed Disk Test (see “IBM Dynamic System Analysis” onpage 71).Note: This test is not available to servers that use RAID or servers with IDE orSATA hard disk drives.Intermittent problemsThis topic provides possible solutions to problems that occur occasionally and aredifficult to diagnose.About this taskv Follow the suggested actions in the order in which they are listed in the Action column until the problem issolved.v See Chapter 4, “Parts listing, Types 7145, 7146, 7143, and 7191,” on page 81 to determine which components arecustomer replaceable units (CRU) and which components are field replaceable units (FRU).v If an action step is preceded by “(Trained service technician only),” that step must be performed only by atrained service technician.Symptom ActionA problem occurs onlyoccasionally and is difficult todiagnose.1. Make sure that:v All cables and cords are connected securely to the rear of the server andattached devices.v When the server is turned on, air is flowing from the fan grill. If there is noairflow, the fan is not working. This can cause the server to overheat andshut down.2. Check the event logs (see “Event logs” on page 38).3. See “Solving undetermined problems” on page 77.Chapter 3. Diagnostics 45
