Symptom-To-Fru Index - IBM DS3950 User And Installation Manual

Table 21. Symptom-to-FRU index
Problem indicator Component
Amber LED is lit
94
IBM System Storage DS3950 EXP395 Storage Expansion Enclosure: Installation, User's, and Maintenance Guide
Possible cause
Drive FRU Drive failure
(Drive Fault
LED
Note: The
green Drive
Activity LED
might also be
Drive not certified
lit.)
Controller firmware
is not at the
minimum version
to support the drive
ESM (Fault ESM failure
LED)
ESM (Port No incoming signal
Bypass LED) detected
Incorrect enclosure
speed setting
ESM failure
Possible solutions
Replace the failed drive.
Note: The amber LED on the
drive might also be lit if the
drive slot has a blank drive tray
inserted in certain ESM firmware
versions.
Verify that the drive option and
FRU part number is supported
by the DS3950 with EXP395s
storage subsystem. (For FRU part
numbers, see "Parts listing" on
page 100, or the DS3950 RFAs).
Upgrade the controller firmware
to the latest version from the
IBM Support web site.
Replace the ESM. See your
controller documentation for
more information. See Chapter 5,
"Installing and replacing
components," on page 65 for
more information.
Reconnect the SFP modules and
the fibre-channel cables. Verify
the input and output SFP and
the FC loopback and
female-female LC connector.
Replace either input or output
SFP modules or fibre channel
cables as necessary.
When connecting the EXP395 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.
If the ESM Fault and Service
Action LEDs are lit, replace the
ESM.