HP ProLiant DL385 G2 Server - Manual (Page 21)

Component identification 21
Hot-plug fans (6-fan configuration)
For server models that support six fans, the fan configuration operates in redundant mode when all six
fans are installed.
For more information, see "Hot-plug fan operation (on page 30 )."
Hot-plug fans (12-fan configuration)
For server models that support 12 fans, the fan configuration operates in redundant mode when all 12
fans are installed.
For more information, see "Hot-plug fan operation (on page 30 )."