IBM RS6000 - 7026 - H70, Service Manual

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SSA Maintenance Analysis Procedures (MAPs)
These maintenance analysis procedures (MAPs) describe how to analyze a
continuous failure that has occurred in a system that contains two or more disk drive
modules. Failing field-replaceable units (FRUs) of the system unit can be isolated
with these MAPs.
How to Use These MAPs
Attention: Switching off the power to an SSA Hot-Swap Disk Drive can cause a
system fault unless you first make the SSA Hot-Swap Disk Drive modules
unavailable to the system unit. To do this:
1. Use the system-management task menus to make the disk drive modules
unavailable.
2. If the system unit has more than one SSA adapter, make the SSA Hot-Swap
Disk Drive modules unavailable to the system for each of the paths to the SSA
Hot-Swap Disk Drive.
Attention: Unless the system unit needs to be switched off for some other reason,
do not switch off the power to the system unit when servicing an SSA Hot-Swap Disk
Drive or the external SSA cable.
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To isolate the FRUs associated with in the failing SSA Hot-Swap Disk Drive,
perform the actions and answer the questions given in this MAP.
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When instructed to exchange two or more FRUs in sequence:
1. Exchange the first FRU in the list for a new one.
2. Verify that the problem is solved. For some problems, verification means
running the diagnostic programs (see the using-system service procedures).
3. If the problem remains:
a. Reinstall the original FRU.
b. Exchange the next FRU in the list for a new one.
4. Repeat steps 2 and 3 until either the problem is solved, or all the related
FRUs have been exchanged.
5. Perform the next action indicated by the MAP.
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The following table explains the meaning of the Power, Ready and Check status
LEDs.
Chapter 2. Maintenance Analysis Procedures
2-35