Lenovo ThinkStation S20 4157 Hardware Manual page 161

Important
When you receive a new hard disk drive, you also receive a set of Product
Recovery discs. The set of Product Recovery discs will enable you to restore the
contents of the hard disk drive to the factory-installed state. For more
information on recovering factory-installed software, refer to "Recovering
software" in your ThinkStation User Guide.
Attention: Your computer supports both SAS hard disk drives and SATA hard
disk drives. However, be sure that you do not install both the SAS and SATA hard
disk drives into the same computer.
To replace a hard disk drive:
1. Remove the computer cover. See "Removing the cover" on page 96.
2. Locate the hard disk drive. See "Locations" on page 97.
3. Disconnect the signal and power cables from the hard disk drive.
4. Pull the handle to remove the hard disk drive.
5. Remove the failing hard disk drive from the bracket by flexing the bracket.
6. To install the new hard disk drive into the bracket, flex the bracket, and then
align pin 1 , pin 2 , pin 3 , and pin 4 on the bracket with the holes in the
hard disk drive. Do not touch the circuit board 5 on the bottom of the hard
disk drive.
Chapter 11. Replacing FRUs - Ibiza Computers
155