Lenovo ThinkStation 4215 Hardware Maintenance Manual page 114

Figure 27. Installing the hard disk drive into the bracket
10. Slide the new hard disk drive into the drive cage until it snaps into position.
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Hardware Maintenance Manual
9. To install a new hard disk drive into the blue bracket, flex the bracket and
align pin 1 , pin 2 , pin 3 , and pin 4 on the bracket with the
corresponding holes in the hard disk drive. Do not touch the circuit board 5
on the bottom of the hard disk drive.
Note: If you are installing a 2.5-inch hard disk drive, install the hard disk
drive into a 2.5-inch to 3.5-inch hard disk drive tray first and then
install the tray into the blue bracket.