Table 5. Components on the front view of 2.5-inch drive configuration (continued)
3  Drive status LED (yellow) 7  2.5-inch drive bays (bay 0 to 7)
4  Front I/O module
1  Front panel
For more information about the front panel, see “Front panel” on page 25.
2  Drive activity LED (green)
Each hot-swap drive comes with an activity LED. When this LED is flashing, it indicates that the drive is in 
use.
3  Drive status LED (yellow)
The drive status LED indicates the following status: 
•  The LED is lit: the drive has failed.
•  The LED is flashing slowly (once per second): the drive is being rebuilt.
•  The LED is flashing rapidly (three times per second): the drive is being identified.
4  Front I/O module
For more information about the front I/O module, see “Front I/O module” on page 26.
5  PCIe slot 3-6
Install PCIe adapters, particularly GPUs to these slots. These PCIe slots support the following configuration: 
•  PCIe slot 3-6, PCIe x16, double-wide, FH/FL
6  PCIe slots 1-2
Not available when rear PCIe riser 1 and rear PCIe riser 2 are installed.
Install PCIe adapters, particularly network adapters to these slots. These PCIe slots support the following 
configuration: 
•  PCIe slot 1-2, PCIe x16, FH/FL
7  2.5-inch drive bays (bay 0 to 7)
Install 2.5-inch drives to these bays. See “Install a 2.5-/3.5-inch hot-swap drive” on page 230 for more 
information.
Front view of 3.5-inch drive configuration
Figure 5. Front view of 3.5-inch drive configuration
Chapter 2. Server components 17