Checkpoint Description Action/
Possible Failing FRU
E526 Reassign the I/O subsystems to the closest
RIO hub
1. Replace the RIO-2 cable specified by
the location code.
2. Replace the RIO riser card that the
failing drawer is attached to.
3. Replace the RIO riser, U0.dd-P1.1, in
the I/O subsystem that the RIO cable in
step 1 is attached to.
4. If the location code associated with this
checkpoint specifies a PCI adapter
card, replace the adapter card.
5. Replace the I/O subsystem planar that
the RIO-2 cable in step 1 is attached to.
6. Go to “MAP 1540: Problem Isolation
Procedures” on page 124.
E527 Enable the memory MAP and I/O MAP for
the current RIO hub port
1. Check for system firmware updates.
2. Replace the RIO riser card specified by
the location code.
3. Go to “MAP 1540: Problem Isolation
Procedures” on page 124.
E528 Begin search for the next available I/O
drawer from a current RIO port
1. Check the RIO cable specified by the
location code. If the location code
specifies an I/O subsystem or its RIO
interface, check the RIO cables going
into and out of the I/O subsystem.
2. Verify that the entire RIO loop
associated with the location code is
cabled correctly.
3. Replace the RIO cables specified by
the location code. If the location code
specifies an I/O subsystem or its RIO
interface, replace the RIO cables going
into and out of the I/O subsystem.
4. Replace the RIO riser, U0.dd-P1.1, in
the I/O drawer that the RIO cables in
step 1 are attached to.
5. Replace the CEC backplane, U0.1-P1.
6. Go to “MAP 1542: I/O Problem
Isolation” on page 127.
Chapter 4. Checkpoints 177
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