Dell PowerEdge 2550 - Manual (Page 5)

b. Position the card in the drive bay so that the notches on the left and right edges of the card are aligned with the tabs on the card guide in
the drive bay.
c. Lower the card into the card guide.
d. Slide the daughter card into the drive bay and align the connector on the card with the corresponding connector on the backplane.
e. Lock the card into place by closing the retention lever on the card's front edge (see Figure 10 -4 ).
6. Reinstall the hard-disk drives in the system.
7. Change the SCSI cable connections to the SCSI backplane as necessary to operate the backplane as a 2 x 2 split backplane.
To configure the drives in a split 2 x 2 configuration (or 1 x 2 and 1 x 3 in a five-drive system), you must connect two SCSI channels to the SCSI
backplane board. The channel attached to connector SCSIB on the backplane board controls slots SCSI ID 0 and SCSI ID 1, while the channel connector
to connector SCSIA controls slots SCSI ID 2, SCSI ID 3, and the fifth drive slot (if installed), SCSI ID 4 (see
Figure 10 -1 ).
8. Close the system doors, and then reconnect the system and peripherals to their electrical outlets.
Configuring the Boot Device
If you plan to boot the system from a hard-disk drive, the drive must be attached to the primary (or boot) controller or SCSI host adapter card. You can select
the primary controller using the System Setup program. See "Using the System Setup Program" in the User's Guide for instructions.
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NOTICE: Ensure that the two connectors are aligned before proceeding.