IBM DS3500, Installation, User'S, And Maintenance Manual

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10 Gbps iSCSI activity LED (green, right)
When this LED is lit solid on, the link is established and there is no activity on this port.
When this LED is off, no link is established. When this LED is flashing, there is activity
on this port.
Seven-segment numeric display LEDs
The seven-segment numeric display LEDs provide information about enclosure identification and
diagnostics. Figure 4-12 shows the numeric display LEDs.
When you turn on the power to the storage or storage enclosure, the numeric display LEDs cycle though
various codes as the controller or ESM firmware starts to boot.
When the storage subsystem is operating normally, the numeric display shows the enclosure
identification (enclosure ID) of the storage subsystem.
If an error has occurred and the 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 enclosure ID. The numeric display shows various diagnostic codes as the enclosures
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 or Hx, where x is a hexadecimal digit, indicate storage subsystem
state information. In general, these codes are displayed only when the storage subsystem is in a
non-operational state. The storage subsystem might be non-operational due to a configuration problem
(such as mismatched types), or it might be non-operational due to hardware faults. If the storage
subsystem is non-operational due to system configuration, the storage subsystem Needs Attention LED is
off. If the storage subsystem is non-operational due to a hardware fault, the storage subsystem Needs
Attention LED is on. The definitions for Lx diagnostic codes are listed in Table 4-2.
Table 4-2. Controller numeric display diagnostic codes
Value Description
L0 Mismatched controller board ID.
L1 Missing interconnect canister.
L2 Persistent memory errors.
e35i0009
Activity (green)
Link rate (green)
Figure 4-11. 10 Gbps iSCSI port LEDs
Figure 4-12. Numeric display LEDs
4-12
System Storage DS3500 and EXP3500: Installation, User's, and Maintenance Guide