IBM SSA 32H3816 - Manual (Page 64)

C.1.2 Rules for SSA Loops
For SSA loops that include the SSA RAID Adapter, the following rules apply:
Each SSA loop must be connected to a valid pair of connectors on the SSA adapter (that is, either connectors A1 and A2, or
connectors B1 and B2).
A maximum of 48 devices can be connected in a particular SSA loop
Only one pair of adapter connectors can be connected in a particular SSA loop
SSA RAID Adapter Installation and User's Guide.
Rules for SSA Loops
_ Copyright IBM Corp. 1996
C.1.2 - 1