Dell PowerEdge 2970 - Manual (Page 17)

Information Update
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Figure 1-3. SAS/SATA Backplane Board Removal
4 If present, disconnect the optical drive power cable from the SAS/SATA
backplane board. See Figure 1-4 for the location of the optical drive power
connector.
5 Disconnect the SAS cable(s) from the backplane connectors.
See Figure 1-4 for the location of the SAS cable connectors.
6 If an optical drive is installed, disconnect the data cable from the back
of the optical drive.
7 If present, remove the storage controller daughter card. See "Removing
a SAS Controller Daughter Card" in your Hardware Owner’s Manual.
1 drive carrier 2 SAS backplane board
3 SAS-backplane board release pin
3
1 2