Hello Matteo, You can use a 12gb sas hba to connect to your MD3200. You will need to get a 12gb to 6gb sas cable so you can connect your host to your MD3200.  Here is the Dell part#1502C which is 12gb on one end and 6GB connector on the other.     Here is the link to the Administrator guide & if you look on page 55 it explains how to configure host access. [URL] Please let us know if you have any other questions.
 Good morning, We are planning to add a PowerEdge R740 to our datacenter.Currently the configuration is composed of:2xPowerEdge R520 connected with a Dell PowerVault MD3200 dual controller SAN with 6Gb/s SAS cabling in redunded connection.Reading the PowerVault manual it seems possible to add other server connections.Currently there is plenty of space on the PowerVault and we don't need fast disk access. As now it is not affordable to upgrade the SAN too I hope it is possible in some way to connect the R740 too to the SAN.The default configuration on the dell site doesn't seem to permit adding a 6Gb/s HBA SAS card. Can the 12Gb/s card be used too with 6Gb/s connections or the connectors/protocol are different? If not possible is there a 6Gb/s HBA card that can be installed on the R740 that is compatible with the powervault? Thank You Matteo
Dell poweredge R740 and powervault MD3200