IBM DS5100 Installation, User's, And Maintenance Manual page 181

Table 47. RAID controller LEDs (continued)
Legend LED
11 Ethernet Link
Activity
12 Numeric Display
(enclosure ID and
Diagnostic Display)
13 iSCSI Host Link
Speed
14 iSCSI Host Link
Activity
The L1 and L2 LEDs for each host and drive channel combine to indicate the status
and the operating speed of each host or drive channel.
Table 48. Host and drive channel LED definitions
L1
Off
Color Normal Status
Green LED Off = No link
established
On = Link
established
Blinking = Activity
Green/yellow Diagnostic LED = flashing: Controller enclosure ID is displayed
seven-
Diagnostic LED = on: Diagnostic code is displayed
segment
display
The Diagnostic LED is located on the Numeric Display. See
"Seven-segment numeric display LEDs" on page 150.
Green LED Off = 100BASE-T
On = 1000BASE-T
Green LED Off = No link
established
On = Link
established
Blinking = Activity
L2 Definition
Off When both LEDs for a host or drive channel are off, this
indicates one or more of the following conditions:
v The host or drive channel ports are bad.
v An SPF module is inserted with no fibre channel cable
v No SFP module is inserted in one or both of the host or
Problem Status
LED is off when a
Ethernet cable is
connected:
Not applicable
LED is off when a
iSCSI cable is
connected:
attached.
drive ports in the channel.
Chapter 4. Operating the storage subsystem
Procedure
v Check to see whether
there are problems
with the Ethernet
cables or switch.
v Verify that the Ethernet
controller is not offline.
v Verify that the
controller Ethernet port
has not been disabled.
v Verify that the
controller Ethernet port
is not bad.
v Check to see whether
there are problems
with the iSCSI cables
or iSCSI switch.
v Verify that the
controller is not offline.
v Verify that the switch
port that the controller
iSCSI port is
connected to has not
been disabled.
v Verify that the
controller iSCSI port is
not bad using the
Ethernet port
loopback.
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