Item Features Icon Description
NOTE: 
• To reset iDRAC using system ID, ensure that the system 
ID button is enabled in the iDRAC setup.
• If the system stops responding during POST, press and 
hold the system ID button (for more than ve seconds) 
to enter the BIOS progress mode.
13 Full height riser slot Use the card slots to connect full-height PCIe expansion cards on 
full height riser.
14 Buttery riser slot Use the card slots to connect full-height PCIe expansion cards on 
buttery riser.
15 PCIe slot Use the card slots to connect up to three half-height PCIe 
expansion cards on the system board.
Drive indicator codes
Each drive carrier has an activity LED indicator and a status LED indicator. The indicators provide information about the current status of 
the drive. The activity LED indicator indicates whether the drive is currently in use or not. The status LED indicator indicates the power 
condition of the drive.
Figure 11. Drive indicators
1
Drive activity LED indicator 2 Drive status LED indicator
3 Drive 
NOTE: If the drive is in the Advanced Host Controller Interface (AHCI) mode, the status LED indicator does not turn on.
Table 8. Drive indicator codes
Drive status indicator code Condition
Flashes green twice per second Identifying drive or preparing for removal.
O Drive ready for removal.
Dell EMC PowerEdge R540 overview 17