Hello AlpsUk, You need to use a SAS HBA instead of the PERC card.  Your MD3200 needs a 6GB SAS non-raid card.  The issue is that you have configured your setup correctly, however since you have your MD3200 connected to a PERC card, your PERC is not able to present the virtual disk to the host. Here is the link to the support matrix & if you look on page 13 it lists out the supported sas hba’s. [URL] Please let us know if you have any other questions.
Hello Need some assistance with an MD3200 we have. It is connected to the server (Dell R710) via SAS cable to a Dell Perc 6/E card. I've set it up so it has a virtual drive and have set a host mapping but in Disk Management it never shows the storage in Disk Management. The host mappings are set like this  [IMAGE] Any clues as to what I am missing please?
Dell MD3200 host mapping issue