IBM Power System Series Manual page 27

Figure 10. Cache data present LED
The following table describes the states of the cache data present LED and what to consider before
attempting a service action.
Table 9. LED indications and actions
Cache battery card
(Un-P1-C14)
Off
Off
Flashing
Flashing
Related information:
Displaying rechargeable battery information
Displaying rechargeable battery information
Displaying rechargeable battery information
RAID/Cache storage
controller (Un-P1-C19)
Off
Flashing
Off
Flashing
Indication
Cache is not active.
Cache is active on C19. Cache
might have been flushed on
C14 if C19 failed.
Cache is active on C14. Cache
might have been flushed on
C19 if C14 failed.
Cache is active on the dual
controllers.
Action
Service actions can proceed.
Attempt to power on and shut
down prior to any service
action.
Attempt to power on and shut
down prior to any service
action.
Attempt to power on and shut
down prior to any service
action. If this is unsuccessful in
clearing the cache active LEDs,
contact support.
SAS subsystem
15