IBM 79463AU Installation And User Manual page 88

11. Insert the SAS/SATA adapter into the connector on the SAS/SATA RAID
12. Tilt the SAS/SATA RAID riser-card assembly slightly and insert the end of the
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IBM System x3550 M2 Types 4198 and 7946: Installation and User's Guide
riser-card until it is firmly seated.
Attention: Incomplete insertion might cause damage to the server or the
adapter.
adapter in the slot on the retention bracket as shown in the following
illustration. Make sure that the SAS/SATA RAID riser-card assembly keys align
correctly with the connector on the system board and press down on the
assembly until it is seated firmly into the connector on the system board.