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IBM System x3650 M3 Types 4255, 7945, and 7949: Problem Determination and Service Guide
c. Install the controller retention bracket from step b by aligning the
retention bracket controller slot and then placing the bracket tabs in the
holes on the chassis and slide the bracket to left until it clicks into place.
d. Install the controller retention bracket from step a by sliding the bracket
inward 1 and pressing down the release tab into place 2 .
2. Place the front end of the SAS controller in the retention bracket and align
the SAS riser card with the SAS riser-card connector on the system board.
3. Press down on the SAS riser card and the rear edge of the SAS controller
until the SAS riser card is firmly seated and the SAS controller card retention
latch clicks into place. One or two pins (depending on the size of the card)
clicks into the corner holes of the SAS controller card when the controller
card is correctly seated.