Getting Started With Your System 21
Backplane Board
Connectors
• 12 or 24 SAS hard-drive connectors
• Two power supply/cooling fan 
module connectors
• Two sets of RAID controller module 
connectors
• One control panel connector for front LEDs 
and enclosure mode switch
Sensors Two temperature sensors
LED Indicators
Front panel
• One two-color LED indicator for 
system status
• Two single-color LED indicators for power 
and enclosure mode
NOTE: The enclosure mode LED is not 
applicable to the PowerVault MD36xxi 
storage array.
Hard-drive carrier
• One single-color activity LED
• One two-color LED status indicator 
per drive
Power supply/cooling fan  Three LED status indicators for power supply 
status, power supply/fan fault, and AC status
RAID controller module Eight single-color LEDs:
• One battery fault
• One cache active
• One controller fault
• One controller power
• One system identification
• One management Ethernet activity
• Two iSCSI IN port activity
Four two-color LEDs:
• Two iSCSI IN link speed
• One SAS OUT link or fault
• One management Ethernet link speed