Contents | 11 
 
 
Troubleshooting a Storage Controller ......................................................... 290 
Troubleshooting Expansion Cards ................................................................ 291 
Troubleshooting Processors ......................................................................... 292 
IRQ Assignment Conflicts .............................................................................. 293 
5  Jumpers and Connectors ......................................................... 294 
System Board Connectors .............................................................................. 294 
Backplane Connectors ................................................................................... 295 
3.5" Hard-Drive Direct Backplane ......................................................... 295 
2.5" Hard-Drive Direct Backplane ......................................................... 298 
2.5" Hard-Drive Expander  Backplane .................................................. 300 
Middle Plane Connectors .............................................................................. 301 
Interposer Extender for 2U Node Connectors ............................................. 302 
LSI 2008 SAS Mezzanine Card Connectors .................................................. 303 
1GbE Mezzanine Card Connectors ................................................................ 304 
10GbE Mezzanine Card Connectors .............................................................. 305 
Power Distribution Board 1 Connectors ...................................................... 306 
Power Distribution Board 2 Connectors ...................................................... 307 
Sensor Board Connectors .............................................................................. 307 
Jumper Settings .............................................................................................. 308 
System Configuration Jumper Settings ............................................... 308 
Direct Backplane Jumper Settings ...................................................... 309 
6  Getting Help ................................................................................ 310 
Contacting Dell ................................................................................................ 310 
7  Index ............................................................................................ 311