Lenovo ThinkSystem 4350 Series Installation And User Manual page 15

Heat sink
ThinkSystem RAID 9350 Series adapters include a passive heat sink, which does not support an optional fan.
The heat sink has four push-pins located at its four corners to ensure an even distribution of force across the
top of the ASIC. For airflow requirements, see "Environmental specifications" on page 25.
Visual indicators
LEDs on ThinkSystem RAID 9350 Series adapters provide a visual indication for the board hardware status
and cache backup system. The LED locations vary, and may be on the front of the board or back of the
board (see Figure 6 "ThinkSystem RAID 9350 Series LED locations" on page 11), and include DDR LEDs
(also referred to as Flash-Based Write Cache, or FBWC, LEDs) and status LEDs. The LED states are
described in Table 9 "ThinkSystem RAID 9350 Series Status LEDs" on page 12 and Table 10 "ThinkSystem
RAID 9350 Series DDR/FBWC LED states" on page 12.
Front panel brackets on ThinkSystem RAID 9350–8i controllers have three holes for the Heartbeat LED, Fault
LED, and Crypto LED.
Figure 6. ThinkSystem RAID 9350 Series LED locations
ThinkSystem RAID 9350–8i (on the front of board) ThinkSystem RAID 9350–16i (on the back of board)
. 11
Chapter 2 Adapter Characteristics