IBM Midrange System DS4000 Series Hardware Manual page 69

Table 3-2 Host and drive channel LED definition
HIC version L1 (Label)
4 Gbps FC Off (1 Gbps)
On (1 Gbps)
Off (1 Gbps)
On (1 Gbps)
8 Gbps FC Off (2 Gbps)
On (2 Gbps)
Off (2 Gbps)
On (2 Gbps)
iSCSI Off (Link)
On/blink (Link)
On/blink (Link)
Numeric display LEDs
When the storage subsystem is operating normally, the numeric display shows the enclosure
identification (enclosure ID) of the storage subsystem and the diagnostic LED flashes once
every two seconds. The storage subsystem tray ID is normally set at the factory to either
values 85 or 00. Verify that the attached storage expansion enclosures are not set to either of
these enclosure IDs.
If an error has occurred and the controller Needs Attention LED is on, the numeric display
shows diagnostic information. The numeric display indicates the information is diagnostic by
illuminating an LED that appears as a decimal point between the display numbers. The
diagnostic LED tuns off when the numeric display shows the storage subsystem enclosure ID.
The numeric display shows various diagnostic codes as the controllers perform the startup
process after each power cycle or reset. After diagnostics are complete, the current storage
subsystem enclosure ID is displayed.
Diagnostic codes in the form of Lx, where x is a hexadecimal digit, indicate controller state
information. In general, these codes are displayed only when the controller is in a
non-operational state. The controller might be non-operational due to a configuration problem
(such as mismatched controller types), or it might be non-operational due to hardware faults.
L2 (Label) Definition
Off (2 Gbps) When both LEDs for a host or drive channel are off, this indicates
one or more of the following conditions:
The host or drive channel ports are bad.
An SPF module is inserted with no Fibre Channel cable
attached.
No SFP module is inserted in one or both of the host or drive
ports in the channel.
Off (2 Gbps) The host channel is operating at 1 Gbps.
On (2 Gbps) The host or drive channel is operating at 2 Gbps.
On (2 Gbps) The host or drive channel is operating at 4 Gbps.
Off (4 Gbps) When both LEDs for a host or drive channel are off, this indicates
one or more of the following conditions:
The host or drive channel ports are bad.
An SPF module is inserted with no Fibre Channel cable
attached.
No SFP module is inserted in one or both of the host or drive
ports in the channel.
Off (4 Gbps) The host channel is operating at 2 Gbps.
On (4 Gbps) The host or drive channel is operating at 4 Gbps.
On (4 Gbps) The host or drive channel is operating at 8 Gbps.
Off (Speed) When both LEDs for a host channel are off, this indicates one or
more of the following conditions:
The host channel ports are bad.
No ethernet connectivity.
Off (Speed) 100 Mbps Ethernet connection established, transfer data
(blinking).
On (Speed) 1000 Mbps ethernet connection established, transfer data
(blinking).
Chapter 3. IBM System Storage DS4000 and DS5000 hardware
51