Depending on the model, the server might come with an optical drive or a tape drive installed in the lower 
5.25-inch optical-drive bay. The upper 5.25-inch optical-drive bay is for a secondary optical drive. Some 
models have a secondary optical drive installed.
4  5  2.5-inch hot-swap drive bays 
The drive bays are used to install eight 2.5-inch hot-swap drives. When you install drives, follow the order of 
the drive bay numbers. The EMI integrity and cooling of the server are protected by having all drive bays 
occupied. The vacant drive bays must be occupied by drive bay fillers or drive fillers.
For more information about drive LEDs, see 
“Drive LEDs” on page 30.
Four 3.5-inch hot-swap + eight 2.5-inch hot-swap drives hot-swap drives bays
Figure 6. Front view of server models with four 3.5-inch hot-swap + eight 2.5-inch hot-swap drives bays
Table 6.  Components on server models with four 3.5-inch hot-swap + eight 2.5-inch drives bays
1  Front I/O module 2  Optical-drive bay 2
3  Optical-drive bay 1 4  3.5-inch hot-swap SAS/SATA drive bays (Bay 4-11)
5  2.5-inch hot-swap SAS/SATA drive bays (Bay 0-3)
1  Front I/O module 
For more information about the front I/O module, see 
“Front I/O module” on page 23.
2  3  Optical-drive bay 
Depending on the model, the server might come with an optical drive or a tape drive installed in the lower 
5.25-inch optical-drive bay. The upper 5.25-inch optical-drive bay is for a secondary optical drive. Some 
models have a secondary optical drive installed.
Chapter 2. Server components 19