Numeric Display Leds; Numeric Display Diagnostic Codes - IBM System Storage DS5020 Installation, User's, And Maintenance Manual

Figure 72. Numeric display LEDs
When you turn on the power to the storage subsystem, the seven-segment LEDs
show 88 before the boot firmware starts to run. After the boot code starts, - - is
displayed.
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
storage subsystem 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 19.
Table 19. Numeric display diagnostic codes
Value
L0
L1
L2
L3
L4
L5
L6
L7
L8
L9
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IBM System Storage DS5020 Storage Subsystem: Installation, User's, and Maintenance Guide
Diagnostic Seven-segment
LED display
Controller State
Suspended
Suspended
Suspended
Suspended
Suspended
Suspended
Suspended
Suspended
Suspended
Suspended
Description
Mismatched controller board
ID
Missing interconnect canister
Persistent memory errors
Persistent hardware errors
Persistent data protection
errors
ACS failure
Unsupported host card
Submodel identifier not set or
mismatched
Memory configuration error
Link speed mismatch