Lenovo ThinkServer TS440 - Manual (Page 40)

Note: Depending on the model, your server might look slightly different from the illustrations in this topic.
Each hot-swap hard disk drive has two status LEDs on the front. Unlock and open the front door to access
the hard disk drives and view the status LEDs.
Figure 14. 3.5-inch hot-swap hard-disk-drive status LEDs
28 ThinkServer TS440 User Guide