For the MD1220, you will have to choose the PERC H800 to be able to use it as an external RAIDed JBOD. You should be able to get 1 or 2 depending on how much redundancy you want and how many slots the R310 has. Some useful Dell websites: [URL] [URL]  [URL]  
Hi,   I am trying to understand which external controller will work best for connecting PE R310 and MD 1220.   When I' m trying to configure R310 on customization page, I see below available options, Dell Single Channel Ultra 320 SCSI PCIe Host Adapter [add $174.30]SAS 6Gbps HBA External Controller [add $139.30]    PERC H800 RAID Adapter for External JBOD, 512MB [add $454.30]    PERC H800 RAID Adapter for External JBOD, 512MB NV Cache [add $489.30]    PERC H800 RAID Adapter for External JBOD, 1Gb NV Cache [add $559.30   And, when I am customizing MD1220, I see below, 2 x PERC H800, SAS Ext 512MG [add $856.68]        PERC H800, SAS, Ext 512MG [add $428.34]    No PERC H800 add $0.00    PERC H800 RAID Kit for External JBOD, 512MB NV Cache [add $461.34]    PERC H800 RAID Kit for External JBOD, 1Gb NV Cache [add $527.34]   I know I have to choose and add external controller in any of the 2 customizations above.    Which controller I choose for best performance and is "6Gb SAS Cable " always to work regardless of controller I choose?   Please let me know, Thanks.
External controller advise