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SSA Maintenance Analysis Procedures (MAPs)
The maintenance analysis procedures (MAPs) describe how to analyze a failure that
has occurred in an SSA loop.
How to Use the MAPs
Attention:
do not switch off the using system when servicing an SSA loop. Enclosure power
cables and external SSA cables that connect the devices to the using system can be
disconnected while that system is running.
v To isolate the FRUs, do the actions and answer the questions given in the MAPs.
v 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
3. If the problem remains:
4. Repeat steps 2 and 3 until either the problem is solved, or all the related FRUs
5. Do the next action indicated by the MAP.
Attention:
from strong magnetic fields.
Unless the using system needs to be switched off for some other reason,
the diagnostic programs (see the using-system service procedures).
a. Reinstall the original FRU.
b. Exchange the next FRU in the list for a new one.
have been exchanged.
Disk drives are fragile. Handle them with care, and keep them well away
Chapter 18. SSA Problem Determination Procedures
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