Dell PowerVault LTO3-080 - Manual (Page 28)

Step 4 — Attaching Mounting Hardware
If your system requires special rails or other hardware to install the tape drive, mount them on the tape drive in this step.
If your system does not require special mounting hardware, proceed to step 5.
Step 5 — Installing the Drive
Slide the tape drive into the open bay, aligning the tray or rails with the slots in the bay, as shown in Figure 7.
Figure 7. Install the Drive
If your system does not use mounting hardware, check that the holes in the chassis are aligned with the holes in the side of the tape drive (see Figure 8).