Table
38.
Symptom-to-FRU
index
(continued)
Problem
indicator
Component
Possible
cause
Possible
solutions
One or more
green LEDs are
off
Power supply
CRUs
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 CRUs
The EXP810 is
connected to an
unsupported
DS4000 storage
subsystem such as
a DS4200 Express.
Verify that the EXP810 is
connected to a supported
DS4000 storage subsystem. Use
the steps “Finding controller,
storage expansion enclosure, and
drive information” on page 72 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
DS4000 storage
subsystem in the
same redundant
drive channel pair.
Verify that all of the storage
expansion enclosures and
DS4000 storage subsystem
enclosure speeds are the same.
Use the procedure in “Verifying
the Link Rate setting ” on page
101 to correct the problem.
Incorrect SFPs are
used such as a 2
Gbps SFP used
when the EXP810
enclosure speed is
set to 4 Gbps.
Verify and replace the SFPs with
the correct speed SFPs.
The EXP810 is not
cabled or incorrectly
cabled to other
storage expansion
enclosures or
DS4000 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 CRUs are not
fully inserted in the
drive slots.
Verify that the drives are seated
correctly in the drive slots.
Remove and reinsert the drive
CRUs if required.
Midplane failure
Replace the midplane. Contact
an IBM technical support
representative.
Chapter 6. Hardware maintenance
129
Summary of Contents for DS4000 EXP810
Page 2: ......
Page 67: ...ds470067 Figure 20 Installing a bezel Chapter 2 Installing the EXP810 39...
Page 229: ......
Page 230: ...Printed in USA GC26 7798 09...
