IBM DS3950, Руководство пользователя и инструкция по установке

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Table 21. Symptom-to-FRU index (continued)
Problem indicator Component Possible cause Possible solutions
One or more
green LEDs are
off Power supply
FRUs Power cable is
unplugged or
switches are turned
off Make sure that the power cable
is plugged in and that the
switches are turned on.
All drive FRUs The EXP395 is
connected to an
unsupported
storage subsystem. Verify that the EXP395 is
connected to a supported DS3950
storage subsystem. Use the steps
“Finding controller, storage
expansion enclosure, and drive
information” on page 50 to
identify which storage subsystem
is connected. Replace the
incorrect storage subsystem with
a correct one.
The enclosure speed
is not the same as
other storage
expansion
enclosures and
DS3950 storage
subsystem in the
same redundant
drive channel pair. Verify that all of the storage
expansion enclosures and DS3950
storage subsystem enclosure
speeds are the same.
Incorrect SFPs are
used such as a 2
Gbps SFP used
when the EXP395
enclosure speed is
set to 4 Gbps. Verify and replace the SFPs with
the correct speed SFPs.
The EXP395 is not
cabled or
incorrectly cabled to
other storage
expansion
enclosures or
DS3950 storage
subsystem. For
example, ESM ports
labeled 2A and 2B
were used instead
of ports labeled 1A
and 1B. Verify and correct the incorrect
cabling if required.
Drive FRUs are not
fully inserted in the
drive slots. Verify that the drives are seated
correctly in the drive slots.
Remove and reinsert the drive
FRUs if required.
Midplane failure Replace the midplane. Contact an
IBM technical support
representative.
Chapter 6. Hardware maintenance
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