IBM DS5100 Installation, User's, And Maintenance Manual page 183

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. If the controller is non-operational due to
system configuration, the controller Needs Attention LED is off. If the controller is
non-operational due to a hardware fault, the controller Needs Attention LED is on.
Definitions for Lx diagnostic codes are listed in Table 49.
Table 49. Numeric display diagnostic codes
Value Controller State
L0 Suspend
L1 Suspend
L2 Suspend
L3 Suspend
L4 Suspend
L5 Offline
L6 Suspend
L7 Suspend/Offline
L8 Offline
L9 Suspend
Storage Manager
Description View
Mismatched controller Needs Attention
types condition for board
type mismatch
Missing Needs Attention
interconnect-battery condition for missing
unit interconnect-battery
unit
Persistent memory Needs Attention
errors condition for offline
controller
Persistent hardware Needs Attention
errors condition for offline
controller
Persistent data Needs Attention
protection errors condition for offline
controller
The alternate Needs Attention
controller has condition for offline
incompatible firmware controller
but automatic
controller firmware
synchronization (ACS)
cannot be performed
Unsupported host
card
Controller with Needs Attention for
different controller offline controller
submodel ID inserted
Unsupported memory Need Attention
is present or memory because the controller
is not populated in is in offline/failed state
the correct memory
slots
Link speed mismatch
Chapter 4. Operating the storage subsystem
151