Ssa Maintenance Analysis Procedures (Maps); Using Ssa Maps - IBM F80 Service Manual

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.

Using SSA MAPs

Attention:
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:
turn off the power to the system unit when servicing an SSA hot-swap disk drive or the
external SSA cable.
v To isolate the FRUs associated within the failing SSA hot-swap disk drive, perform
the actions and answer the questions given in this MAP.
v When you are instructed to exchange two or more FRUs in sequence, do the
following:
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. Perform the next action indicated by the MAP.
SSA disk drives have light emitting diodes (LEDs) to identify the state of the disk
drive (1) shown in the following diagram.
If all the devices and cables have been removed, then one of the FRUs
remaining in the system unit is defective.
To test each FRU, exchange the FRUs in the following order:
1. Adapter (last one installed)
2. System board (see note 3 on page 41)
If the symptom did not change and all the FRUs have been exchanged, return
to "Step 1540-2" on page 58.
Turning off the power to an SSA hot-swap disk drive can cause a system
Unless the system unit must be turned off for some other reason, do not
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.
Chapter 3. Maintenance Analysis Procedures
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