Figure 15. Server components (3.5-inch drive bay chassis)
The parts are identified as one of the following: 
•  Tier 1 customer replaceable unit (CRU): Replacement of Tier 1 CRUs is your responsibility. If Lenovo 
installs a Tier 1 CRU at your request with no service agreement, you will be charged for the installation. 
•  Tier 2 customer replaceable unit (CRU): You may install a Tier 2 CRU yourself or request Lenovo to 
install it, at no additional charge, under the type of warranty service that is designated for your server.
•  Field replaceable unit (FRU): FRUs must be installed only by trained service technicians.
•  Consumable and structural parts: Purchase and replacement of consumable and structural parts is your 
responsibility. If Lenovo acquires or installs a structural component at your request, you will be charged 
for the service.
Chapter 2. Server components 65