Mode jumper is missing . . . . . . . . . . . . . . . . . . . . . . . . . . . 573
System reference codes (SRC) address formats . . . . . . . . . . . . . . . . . . 573
Hardware SRC formats . . . . . . . . . . . . . . . . . . . . . . . . . . . 577
Cryptographic I/O processor . . . . . . . . . . . . . . . . . . . . . . . . . . 579
Determine if the system has logical partitions . . . . . . . . . . . . . . . . . . . . 579
Determine if the system has guest partitions . . . . . . . . . . . . . . . . . . . . 579
Determine the release level of a guest partition . . . . . . . . . . . . . . . . . . . 580
Determine the hosting partition of a guest partition . . . . . . . . . . . . . . . . . . 580
Determine the load source disk and alternate IPL device . . . . . . . . . . . . . . . 580
Find the load-source disk on systems without mirrored protection . . . . . . . . . . . 580
What you should know about load source disks on systems with mirrored protection . . . . 581
Find the load source disks on systems with mirrored protection . . . . . . . . . . . . 581
Alternate IPL device . . . . . . . . . . . . . . . . . . . . . . . . . . . . 581
Reclaim IOP cache storage . . . . . . . . . . . . . . . . . . . . . . . . . . 583
Forms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 583
Problem summary form . . . . . . . . . . . . . . . . . . . . . . . . . . . . 584
Preventive maintenance (PM) . . . . . . . . . . . . . . . . . . . . . . . . . 585
Work with electrostatic discharge-sensitive parts . . . . . . . . . . . . . . . . . . 585
System safety inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . 586
Covers - all models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 586
AC power cords - all models . . . . . . . . . . . . . . . . . . . . . . . . . 587
AC safety grounds . . . . . . . . . . . . . . . . . . . . . . . . . . . . 587
Safety labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 587
Power off and on (system unit) - all models . . . . . . . . . . . . . . . . . . . 587
Internal mechanical inspection . . . . . . . . . . . . . . . . . . . . . . . . 587
Service log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 588
HSL loop configuration and status form . . . . . . . . . . . . . . . . . . . . . . 590
HSL link status diagnosis form . . . . . . . . . . . . . . . . . . . . . . . . . 592
Installed features in a PCI bridge set form . . . . . . . . . . . . . . . . . . . . . 593
HSL cable location form . . . . . . . . . . . . . . . . . . . . . . . . . . . 593
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 594
Related information for Analyze hardware problems . . . . . . . . . . . . . . . . . . 600
Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 603
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 605
Contents ix
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