IBM DS3950, Инструкция по установке, использованию и обслуживанию, Страница: 189 / 252

Table 22. Symptom-to-FRU index (continued)
Problem indicator Component Possible cause Possible solutions
Intermittent or
sporadic power
loss to the storage
subsystem Some or all
CRUs Defective ac power
source or
improperly
connected power
cable Check the ac power source.
Reseat all installed power cables
and power supplies. If
applicable, check the power
components (power units or
universal power supply). Replace
defective power cables.
Drives are part of
an exported array.
When the array is
exported, the power
to the drives in the
array is turned off
so that they can be
removed from the
enclosure. Use the Subsystem Management
window in the DS Storage
Manager to verify that the drives
are indeed part of an exported
array. If they are, remove the
drives from the storage
subsystem as required.
Note: If the drives are removed,
the empty drive slots must be
filled with other drives or blank
drive trays to ensure optimal air
flow.
Drives are
incompatible.
Power to
incompatible drives
is turned off when
they are inserted
into the drive slots. Use the Subsystem Management
window in the DS Storage
Manager to verify that the drives
are recognized as incompatible.
Replace the incompatible drives
with drive options that are
supported by the storage
subsystem controllers. See the
“Parts listing” on page 164 for a
list of compatible drives.
Drive failure Use the Subsystem Management
window in the DS Storage
Manager to verify that the drive
or drives are recognized as failed
by the storage subsystem.
Replace the failed drives. See the
“Parts listing” on page 164 for a
list of compatible drives.
Power supply
failure Check the power supply Fault
LED on the power supply. If the
LED is lit, replace the failed
CRU.
Midplane failure Have the midplane replaced.
Contact an IBM technical support
representative.
Chapter 6. Hardware maintenance
161