IBM Power Series Handbook page 22

Figure 7. Memory card locations
PCIe SAS RAID and SSD adapter locations
Figure 8. PCIe SAS RAID and SSD adapter locations
The following table provides location codes for parts that comprise the server.
Table 3. FRU location
Failing item name
System unit
10
Finding parts, locations, and addresses
Physical location code
Un
Failing item
removal and
replacement
Identify LED procedures