原討論串看到的，所以應該能接到32顆吧

Q: How many cables do I need to connect the HP SAS expander to my RAID or HBA card?
A: You only need 1, at 2.4Gbps it's enough bandwidth for all your drives, however 2 cables provide a 4.8Gbps interlink. In benchmark tests I didn't see any performance difference between using 1 and 2 interlink cables. That may change however when the expander is combined with SAS2 RAID cards and/or SATA3 harddisks. When a SAS2 RAID or non-RAID HBA drives this expander, the interlink speeds are double (4.8Gbps for single cable, 9.6Gbps for two cables).

Q: How many harddisks can you attach to the HP SAS expander?
A: Up to 32. I've stress various configurations including a RAID6 array of 32 x 1Tb drives and had no issues