Fujitsu PRIMERGY TX2550 M5 Upgrade And Maintenance Manual page 206

Hard disk drive (HDD) / solid state disk (SSD)
Figure 113: Example: six backplanes - rack model
1 SAS backplane 1 in HDD cage 1 (basic
configuration)
2 SAS backplane 2 in HDD cage 1 (basic
configuration)
3 SAS backplane 3 in HDD cage 2 (basic
configuration)
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4
5
6
Upgrade and Maintenance Manual
SAS backplane 4 in HDD cage 2 (basic
configuration)
PCIe SSD backplane 1 in optional 4x
2.5-inch PCIe SSD extension box
PCIe SSD backplane 2 in optional 4x
2.5-inch PCIe SSD extension box
TX2550 M5