IDE RAIDNote: See “System” on page 94 to determine which components should be replaced by a field service technician.Error symptom FRU/actionDrives are not detected 1. Verify that drives are installed correctly:a. Cables should be of type Ultra ATA-100 or ATA-133 and should beinstalled correctly.b. Power cables to drives should be connected properly.2. Cables.3. Drive.System hangs when MegaRAIDIDEal Software CSB6 RAIDadapter ROM scans the IDEchannels1. Verify that drives are installed correctly:a. Cables should be of type Ultra ATA-100 or ATA-133 and should beinstalled correctly.b. Power cables to drives should be connected properly.2. Cables.3. Drive.BIOS reports that a mirroredarray is in degraded mode 1. Verify that all physical drives are:a. Installed correctlyb. Powered on2. Reconnect, replace, or rebuild any failed drive.One of the hard disk drives ina mirrored array has failed 1. Verify that drives are installed correctly.2. Replace drive with another drive of the same capacity."NO ROM BASIC SYSTEMHALTED" message displaysduring startup (There are noactive partitions)1. Verify that drives are installed correctly.2. Run FDISK to set active partition.Operating system does notboot 1. Check system BIOS configuration for PCI interrupt assignments andverify that some interrupts are assigned for PCI.2. Verify that the boot device in system BIOS setup (CMOS setup) is selectedcorrectly.Error symptomsYou can use the error symptom table to find solutions to problems that have definitesymptoms.If you cannot find the problem in the error symptom charts, go to “Starting thediagnostic programs” on page 22 to test the server.If you have just added new software or a new option and the server is not working,do the following before using the error symptom charts:v Remove the software or device that you just added.v Run the diagnostic tests to determine if the server is running correctly.v Reinstall the new software or new device.In the following table, if the entry in the FRU/action column is a suggested action,perform that action; if it is the name of a component, reseat the component andreplace it if necessary. The most likely cause of the symptom is listed first.Chapter 8. Symptom-to-FRU index 77