Dell PowerEdge T550 Installation and Service Manual

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Drive backplane

The PowerEdge T550 supports a 3.5-inch SAS/SATA and 2.5-inch SAS/SATA/NVMe drive backplane.
Figure 1. 3.5-inch drive backplane
This image shows a 3.5-inch backplane.
  1. BP_PWR_1
  2. BP_SIG
Figure 2. 2.5-inch drive backplane
This image shows a 2.5-inch backplane.
  1. BP_PWR_CTRL
  2. BP_SIG
  3. BP_PWR_1
  4. BP_DST_PA1

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