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Table 51. Symptom-to-FRU index
Problem
indicator Component Possible cause Possible solutions
Amber LED is lit Drive CRU
(Drive Fault
LED)
Note: The
green Drive
Activity LED
might also be
lit.
Drive failure Replace the failed drive.
Note: The amber LED on the
drive is also lit if the drive slot
has a blank drive tray inserted.
Drive uncertified Verify the drive option and FRU
part number to verify that it is
supported by the DS4700
Express Storage Subsystem. (For
FRU part numbers, see Table 52
on page 189.)
RAID controller
(Fault LED)
Note:
Controller
Service Action
Allowed LED
will also be lit.
RAID controller
failure
Replace the RAID controller. See
your controller documentation for
more information. See Chapter 5,
“Replacing components,” on page
145 for more information.
Controller was
placed offline by a
user or the other
controller.
Use the menu function in the
DS4700 Express Subsystem
Management window to place the
controller back online. If the
controller continues going to an
offline state after being placed
online, replace the RAID
controller.
Unsupported
controller type. For
example, a DS4200
Express FRU is
inserted into a
DS4700 Express
chassis.
Use the Storage Manager Client
Subsystem Management window
and Recovery Guru to verify that
the correct controller FRU is
used. Replace with the correct
DS4700 Express controller FRU.
RAID controller
(Port Bypass
LED)
No incoming signal
detected
Reconnect the SFP modules and
the fibre-channel cables. Verify
the input and output SFP using
the path failure determination
instruction in the DS4000
Problem Determination Guide
and the FC loopback and
female-female LC connector.
Replace either input or output
SFP modules or fibre channel
cables as necessary.
Incorrect enclosure
speed setting
When connecting storage
expansion enclosures to the
existing operating redundant
drive loop with a different speed
setting, the port goes into bypass
mode because mixing different
speed enclosures within the
same redundant drive
loop/channel is not supported.
RAID controller
failure
If the RAID controller Fault LED
is lit, also replace the RAID
controller.
184 IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide