System-error  LED:  When  this  amber  LED  is  lit,  it  indicates  that  a  system  error  has 
occurred.  Use  the  diagnostic  LED  panel  and  the  system  service  label  on  the  inside 
of  the  left-side  cover  to  further  isolate  the  error.  See  the  Problem  Determination  and 
Service  Guide  on  the  IBM  System  x  Documentation  CD  for  additional  information. 
USB  1  connector:  Connect  USB  devices  to  these  connectors. 
USB  2  connector:  Connect  USB  devices  to  these  connectors. 
DVD-eject  button:  Press  this  button  to  release  a  CD  or  DVD  from  the  DVD  drive. 
Hard  disk  drive  status  LED:  When  this  LED  is  lit,  it  indicates  that  the  associated 
hard  disk  drive  has  failed.  If  an  optional  RAID  adapter  is  installed  in  the  server  and 
the  LED  flashes  slowly  (one  flash  per  second),  the  drive  is  being  rebuilt.  If  the  LED 
flashes  rapidly  (three  flashes  per  second),  the  controller  is  identifying  the  drive. 
Hard  disk  drive  activity  LED:  When  this  LED  is  flashing,  it  indicates  that  the  drive 
is  in  use. 
Hard  disk  drive  status  LED:  On  some  server  models,  each  hot-swap  hard  disk 
drive  has  a  status  LED.  When  this  LED  is  lit,  it  indicates  that  the  drive  has  failed.  If 
an  optional  IBM  ServeRAID  controller  is  installed  in  the  server,  when  this  LED  is 
flashing  slowly  (one  flash  per  second),  it  indicates  that  the  drive  is  being  rebuilt. 
When  the  LED  is  flashing  rapidly  (three  flashes  per  second),  it  indicates  that  the 
controller  is  identifying  the  drive. 
DVD  drive  activity  LED:  When  this  LED  is  lit,  it  indicates  that  the  DVD  drive  is  in 
use. 
 
Chapter  1.  The  System  x3500  server  9