IBM 88631SU Service Guide - Page 62
Checkout, procedure, About, checkout, Performing
UPC - 000435913135
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Checkout procedure The checkout procedure is the sequence of tasks that you should follow to diagnose a problem in the server. About the checkout procedure Before performing the checkout procedure for diagnosing hardware problems, review the following information: v Read the safety information beginning on page vii. v The diagnostics programs provide the primary methods of testing the major components of the server, for example, the I/O board, Ethernet controller, keyboard, mouse (pointing device), serial ports, and hard disk drives. You can also use them to test some external devices. If you are not sure whether a problem is caused by the hardware or by the software, you can use the diagnostics programs to confirm that the hardware is working correctly. v When you run the diagnostics programs, a single problem might cause several error messages. If you receive several error messages, correct the cause of the first error message. The other error messages might not occur the next time you run the diagnostics programs. v Before running the diagnostics programs, you must determine whether the failing server is part of a shared hard disk drive cluster (two or more servers sharing external storage devices). If it is part of a cluster, you can run all diagnostics programs except the ones that test the storage unit (that is, a hard disk drive in the storage unit) or the storage adapter that is attached to the storage unit. The failing server might be part of a cluster if any of the following conditions is true: - You have identified the failing server as part of a cluster (two or more servers sharing external storage devices). - One or more external storage units are attached to the failing server and at least one of the attached storage units is also attached to another server or unidentifiable device. - One or more servers are located near the failing server. Important: If the server is part of a shared hard disk drive cluster, run one test at a time. Do not run any suite of tests, such as "quick" or "normal" tests, because this might enable the hard disk drive diagnostic tests. v If the server is suspended and a POST error code is displayed, see "Error logs" on page 18. If the server is suspended and no error message is displayed, see "Problem isolation tables" on page 47 and "Solving undetermined problems" on page 104. v For information about power-supply problems, see "Solving power problems" on page 102 and "Power-supply LEDs" on page 67. v For intermittent problems, check the error log; see "Error logs" on page 18 and "Diagnostic programs, messages, and error codes" on page 69. Performing the checkout procedure To perform the checkout procedure, complete the following steps: 001 IS THE SERVER PART OF A CLUSTER? 002 No. Go to step 004 . 003 Yes. Schedule maintenance. Shut down all failing systems that are related to the cluster. Go to step 004 . 46 IBM System x3850 Type 8863, 7362: Problem Determination and Service Guide