IBM TotalStorage DS300 Best Practices Manual page 57

LED symbol Controller problem indicator
Amber Battery Fault LED is lit.
When this LED is lit, it indicates that the
battery cannot sustain the RAID controller
memory in case of power loss. This might
be caused by any of the following
conditions:
The battery is removed.
There is a battery-charger circuit
failure.
The battery temperature is too high.
The battery voltage is out of range.
The battery charge current is out of
range.
Amber Cache Dirty LED is lit.
When this LED is lit, it indicates that there
is data in the cache that has not been
written to a disk or synchronized to the
redundant controller cache.
Action
1. Determine whether any other amber
LEDs are lit and follow the appropriate
recovery process for that component.
2. Remove the controller and replace the
battery. Then reinsert the controller.
Note: This action is not applicable to
the type 1701 (model 1RL) because it
does not have a battery
The Cache Dirty LED will go on and off at
varying rates and durations during normal
operation. No action is required when this
LED goes on.
If the Cache Dirty LED lit solidly, it indicates
an improper controller shutdown during the
controller initialization. Restart the
controller from ServeRAID Manager to
flush the cache. The Cache Dirty LED will
turn off before the Controller Ready LED
turns on and the server logins start.
Attention: Do not turn off power to the
enclosure or remove the controller from the
enclosure when the Cache Dirty LED is
illuminated. Doing so could cause loss of
any data in the cache that is not mirrored.
Notes:
1. This is not a FRU.
2. This action is not applicable to the
DS300 type 1701 (model 1RL
because it does not support a cache.
Chapter 3. Components overview
39